Nidec RINDCODE NRX Series User manual

www.nidec.com/jp/nidec-shimpo
91471N
Contents
Safety Precautions ・ ・ ・ ・ ・ ・
Operating Precautions ・ ・ ・ ・
Storing Precautions ・ ・ ・ ・ ・
Installation ・ ・ ・ ・ ・ ・ ・ ・ ・
Operation・・・・・・・・・・
Special Lubricating Oil ・ ・ ・ ・
Periodical Inspection ・ ・ ・ ・ ・
Troubleshooting ・ ・ ・ ・ ・ ・ ・ ・
Disassembly & Reassembly ・ ・
1
2
4
5
6
8
11
11
12
Ｒ
NRX
Series
Instruction Manual
200B to 18K
RINGCONE
Adjustable Speed Drive

1
Precautions for installation
Do not connect this product to an power source
beyond the speci󳞛ed voltage range.
If you connect the product to an power source beyond the voltage
range indicated on the motor nameplate, the heated motor could
result in motor burns and 󳞛re.
Be careful of electric shock during connection.
Do not connect the product with wet (or sweaty) hands. Before wiring, be
sure to turn the power OFF. Failure to follow this could result in electric
shock.
Do not touch the keyway on the input and output
shafts with bare hands.
Be careful to touch the keyway. Failure to follow this could result in
injury on your hands or 󳞛ngers due to the sharp edges.
Do not install Ringcone in a place directly exposed to
rain or water.
Failure to follow this could result in electric shock, fire, and/or
malfunction. When you use or install the product outdoors, select
an outdoor model.
Install the product on a rigid surface that is not prone
to vibration.
If the installation surface is not rigid enough, the machine could fall
over during operation or a device could be damaged due to excessive
vibration.
Mount a safety cover on the rotational items.
Failure to follow this could result in injury on your hands or 󳞛ngers
if you come into contact with the rotational items.
Do not install the product in an area with an ambient
temperature of lower than 0ºC and higher than 40ºC.
If you use the product in a transportation device, or
lifting device, apply protective device like brake for
safety.
Disconnect the power supply for motor, when
connecting. To prepare pan or something for an oil leakage, if
the leaking makes serious issues on application
such as food , chemical machines, etc.
Heavy! Be careful when carrying.
Failure to follow this could result in serious injury if you drop the
product on your feet accidentally during carrying or installation.
The type of precautions we would like you to observe is categorized using the following symbols,
and explanations are added (some examples as given below).
Safety Precautions
Be sure to read before use
Thank you for purchasing the NIDEC-SHIMPO product. To use this product properly and safely, please be sure to read this
manual thoroughly before use. Keep this instruction manual where all users can read and/or refer to it at any time.
Before use, please carefully read these safety precautions and follow them for proper use.
WARNING Indicates a potentially hazardous situation that may result in serious injury if you incorrectly handle
this product.
CAUTION Indicates a potentially hazardous situation that may result in minor or moderate injury and/or property
damage if you incorrectly handle this product. However, more severe results may also occur depending
on the situation if mishandled. Be sure to observe all precautions.
DANGER Indicates a potentially hazardous situation that may result in 󳞛re, serious injuries, and/or death if you
incorrectly handle this product by neglecting the following precautions.
A reminder to pay close attention.
A prohibited action you must not do.
A forced action you must always do.
！
！
！
！
・ We are not responsible for damages resulting from negligence through failure to follow the instructions set out in this manual.
・ We are not responsible for damages resulting from earthquake and/or 󳞛re unrelated to us, actions by third parties, or any other accidents,
intentional or through customer negligence, as well as from accidents caused by misuse or improper use under abnormal conditions.
・ For information regarding assurance provisions, please read the attached warranty certi󳞛cate.
This instruction manual categorizes safety precautions as DANGER, WARNING, and CAUTION according to level of importance.
Each precaution has an important explanation related to safety. Be sure to observe all precautions.
Precautions for operation
Do not use the product in an atmosphere with a risk of
󳞛re and/or explosion.
If you use this product in an atmosphere with risk of fire and/or
explosion, select the explosion-proof model.
Do not touch the unit because it may become hot
during operation.
Failure to follow this could result in burns.
Do not touch the rotating parts during operation.
Do not touch the output shaft, input shaft, or fan.
Avoid operation overloaded.
If you operate the unit with overload, the heated motor could result
in motor burns and/or 󳞛re.
Before rotating the motor reversely, be sure to stop it completely.
Precautions for inspection and maintenance
Turn the power OFF during inspection.
Con󳞛rm the power source complete off before inspection
& maintenance.
Do not touch the unit during operation and
immediately after operation stops.
The housing temperature will not decrease immediately after
operation stops. Confirm that the temperature of the product has
decreased before touching for inspection and/or disassembly.

2
■ Lubricating oil
・Be sure to use the speci󲶻ed lubricating oil.
・ Do not mix any other lubrication.
・ If you use this product in an area with an ambient temperature of 0ºC or less, or 40ºC or more, heat- or cold-resistant lubricating oil is required.
・ Since, unless otherwise requested, the speed drive is 󳞛lled with the proper amount of lubricating oil before shipping, additional lubrication is not
required.
・ Check the oil level every day.
・ Keep the replacement interval, and replace accordingly.
・ At initial operation, con󳞛rm the rotating direction of the output shaft, and gradually apply the load.
・ The handle rotational direction and increasing or decreasing speed may depend on the handle mounting direction. For more information,
please contact us.
・ The surface temperature of the speed drive housing under normal operation can reach up to approximately 50ºC higher than the ambient
temperature.
・ Switch between forward and reverse rotation after the motor (input) shaft stops completely.
・ Never change the speed when operation stops.
・ Be careful not to overload.
・ NRX is an output torque limiting model. Especially in the middle- and high-speed areas, the speed drive may be overloaded even with
the motor rated current value or less. For more information, please contact us.
■ Dial Plate & Load
・ The output speed will not change as long as a load does not change.
If a load changes greatly, however, the output speed might change even
at the same dial plate position
・ Note that the output speed might change if a load changes greatly.
■ Output Speed
・When using product continuously, use it in the middle and high-speed areas,
which secures high ef󳞛ciency.
・ If a special request was not given at the time of order, the rotation speed is set
to 0 rpm when a light load is applied.
・ If you continuously use this unit in the low-speed area of 100 rpm(*1) or less,
it could be susceptible to load changes, and the rotation speed might become unstable.
■ Input Speed
・Allowable input speed: based on the standard speci󳞛cations.
When using the product with a lower input speed than the above, please contact us.
Operating Precautions
*We recommend using the automatic control when high accuracy is desired.
About this product
Middle- and high-speed areas...
Indicates the range between 3 and MAX on the dial.
(*1) Output speed without the reducer
Precautions during operation
For purchase of the lubricating oil (special traction drive oil for the speed change section),
contact us or any of the ENEOS Corporation of󳞛ces.
*Refer to “ 3 Special lubricating oil” described on page 8.
Lubricating oil plays an important role, which can be used not only for power transmission, but also for burn,
wear, rust prevention, and for cooling.
Since lubricating oil greatly in󳞜uences the performance of the product and service life, be sure to use the
special lubricating oil only.
20 rpm (when 1800 rpm is input)
at this point with no load (*1)
0 rpm at this point with 100% load
Dial position at no load
Dail position at medium load
Dial position at 100% load
Mating mark
NRX-200 B to 7500 …700rpm to 2000rpm
NRX-11K to 18K …900rpm
to 1800rpm

3
■ Daily inspection
・ Check to ensure that the load condition is appropriate.
・ Check to ensure that the speed drive housing temperature is not extremely high during operation
・ Check to ensure that there is no abnormal rolling noise with the bearings and/or traction drive parts.
・ Check to ensure that abnormal vibration is not being generated from the speed drive.
<Lubricating oil inspection>
・ Check to ensure that the lubricating oil is supplied to the appropriate indication level (check when operation stops).
・ Check to ensure that the lubricating oil is not dirty, and that the degree of transparency is high.
・ Check to ensure that there is no oil leakage
■ Periodical inspection (every three months)
・ Check to ensure that pulleys, sprockets, and speed drive mounting bolts are not loose.
・ Check to ensure that there are no problems in the electrical system.
・ Check to ensure that the load condition is appropriate.
・ Replacement of lubricating oil
(A temperature of up to approximately 50ºC higher than the ambient temperature will not cause any problems).
(for example, check oil seals on the input and output shaft parts, O-rings, oil gauge, and the area around the oil 󳞛lling and drain ports).
◎ If abnormal high temperature, noise, vibration, and/or oil leakage occur, stop operation immediately
and contact us.
*Refer to “3-1 Special lubricating oil list” and “3-2 Replacement of lubricating oil” , and use the special lubricating oil.
Inspection

4
Perform periodical inspection to check that the aforementioned storage procedures have been taken properly, and that the storing methods
are correct.
(1) Return the product to normal conditions from those taken for storage (such as for the amount of special oil).
(2) Since bearings may partially run out of grease resulting from the grease hardening during long-term storage, be sure to turn the motor
shaft by hand from the fan side before operation, and check that there are no problems.
(3) Since exposed parts of rubber and/or resin parts in the oil seal, O-ring, and oil gauge, etc., may become deteriorated due to environmental
in󳞜uences, such as temperature, humidity, and/or ultraviolet rays, check those parts before resuming operation. If any deterioration is
found, replace with new ones.
Rust-proo󳞛ng interval Within one year (our shipping standard) Over one year to less than three years (our recommendation)
Instructions at ordering No particular instructions are necessary “Special rust-proo󳞛ng speci󳞛cations” need to be instructed
Rust-proo󳞛ng area Rust-proo󳞛ng procedures at factory
shipping Rust-proo󳞛ng oil agent Rust-proo󳞛ng procedures at
factory shipping Rust-proo󳞛ng oil agent Procedures after shipping
Exposed parts of the
product, input/output
shafts, and 󳞜ange
section
Input/output shafts
After rinsing, wrap plastic tape
around.
Flange section
After rinsing, apply the rust-
proo󳞛ng oil agent to it, and pack
the whole part with a plastic bag.
JIS K2246 NP-2
Idemitsu Daphne Evercoat PL,
or equivalent
Input/output shafts
After rinsing, apply the rust-
proo󳞛ng oil agent to them, and
wrap plastic tape around.
Flange section
After rinsing, apply the rust-
proo󳞛ng oil agent to it, and pack
the whole part with a plastic bag.
Equivalent to JIS K2246 NP-19
Taiyu Sabiden SAP D-15K, or
equivalent
Check the condition of the rust-
proo󳞛ng one year after shipping,
and re-apply the rust-proo󳞛ng
oil, if necessary.
After that, carry out the same
procedure every year.
Inside
of the
product
Grease Special grease supplied at shipping - Special grease supplied at shipping - No special procedures are
necessary
Oil
Special oil supplied at shipping
(The air breather has been sealed) -
Add special oil thoroughly
inside the housing.
(The air breather has been sealed)
-
Take the same procedures as in
the left, two years after shipping.
When starting operation, replace
with new oil, and 󳞛ll to the
speci󳞛ed level.
Supplied
oil
cooler
pump
unit
Water-cooled
system
Operate with special oil, and drain
oil at shipping.
(The air breather has been sealed)
Eliminate water from pipes
completely, dry, and seal the cooling
water openings.
-
Add special oil thoroughly inside
the unit.
(The air breather has been sealed)
Eliminate water from pipes
completely, dry, and seal the
cooling water openings.
-
Take the same procedures as in
the left, two years after shipping.
When starting operation, replace
with new oil.
Air-cooled
system
Operate with special oil, and drain
oil at shipping.
(The air breather has been sealed)
-
Add special oil thoroughly inside
the unit.
(The air breather has been sealed)
-
Take the same procedures as in
the left, two years after shipping.
When starting operation, replace
with new oil.
Storing Precautions
If you do not plan to use the product immediately after purchase, store it under the following precautions.
To store temporarily
To store for a long period of time
Inspection during storage
Inspection before resuming operation
(1) Store the product in a clean and dry place.
(2) If you store the product outdoors or in a humid place, put it in a box, seal the box, and cover with plastic sheets.
(3) When storing, attach a red rubber stopper into the air release plug, or set a plug stopper to prevent humidity from entering the product.
1) When storing the product in outdoor areas subject to a lot of rain and/or humidity after installing on the site
(1) Cover the whole product with a water-proof sheet, and 󳞛x the sheet securely to prevent it from coming off due to strong wind, as well as
to avoid entering rain and/or dust from clearance gap.
(2) If moisture is expected to evaporate from the ground, put the water-proof sheet underneath to prevent exposure to humidity from the
evaporation, 󳞛lling inside the sheet.
(3) When storing, attach a red rubber plug into the air release plug, or set a plug stopper to prevent humidity from entering the product.
(4) Set the cover on the motor terminal box, and seal the lead wire openings to avoid humidity from entering through the terminal box to the
inside of the motor.
2) When storing the product indoors
When there is less humidity, cover the product with a plastic bag, etc., and follow the procedures described in (3) and (4) above.
3) When storing the product for a long period of time, over a year, special rust-proo󳞛ng speci󳞛cations are required in addition to the above
procedures.
4) Rust-proo󳞛ng intervals and procedures
Note : Only when the export rust-proo󳞛ng speci󳞛cations or instructions are given, rust-proo󳞛ng oil is applied to the input/output shafts even in less than one year.

5
NRXMK Y
Base type
NRXMK Z
Base type
NRXMK V
Flange type
NRXMK I
Flange type
NRXMK X Flange type
c
b
a
d
2. When connecting the product, do not apply impact force and/or excessive thrust load on the output shaft
(use tapping hole on the output shaft for 11K to 18K).
a Since the output shaft diameter dimension tolerance of the speed drive has been
set to h6 for 200B to 7500, and m6 for 11K to 18K, set the hole tolerance of the
coupling, pulley, chain sprocket, and gear, which are to be mounted, to H7 for
200B to 7500, and F7 for 11K to 18K. Then, push the output shaft into the hole
by tapping with a wooden or plastic hammer. Pushing the shaft by hitting it hard
could result in damage to bearings and/or the inside of the speed drive.
b Chamfer the hole mouth by approximately 1 mm.
c Make clearance of 0.1 mm to 0.2 mm for the key head.
d Hold and secure the key head using a set bolt.
3.Ensure centering before connection.
■ For connection with a coupling, properly align the speed drive shaft with
the mated machine shaft.
■ For connection with pulley, chain sprocket, and gear, etc., properly make
the speed drive shaft parallel with the mated machine shaft, determine the
correct center line, and 󳞛t precisely.
Note : Make the effective diameter of the coupling, pulley, chain sprocket, and gear, etc. at least
five times the output (input) shaft diameter of the speed drive. Be careful not to allow
impact, vibration, and/or excessive thrust load from the machine to apply to the shaft ends.
(For information about allowable shaft weight, refer to the catalog).
1. Allow a suf󳞛cient margin when setting the rotating speed and torque.
■ When driving the mated machine at the maximum speed, connect the speed drive so that it also operates at the maximum rotation.
■ For machines of which torque increases at the lower speed (such as those with constant horsepower characteristics), set the maximum torque to be
within the rated torque of the speed drive.
1
NRXMK Base type
30cm
Maintain an ambient
temperature between
0ºC and 40ºC
Make it easy to add
and drain oil
Install horizontally on a
vibration-free bench
Keep from getting wet Provide sufficient
clearance
Make the oil gauge
easily visible
10cm
1-1 Installation
1-2 Connections
1. Avoid installing the product in a place directly exposed to rain or water.
■ Consult us in advance if you use the product outdoors, or in a place exposed to dust or water.
2.Install the product in an area with an ambient temperature of between 0ºC and 40ºC.
■ If you plan to use the product beyond the above mentioned temperature range (at higher or lower temperature), be sure to consult us.
3.Securely 󳞛x the product using bolts on a solid installation bench that is not prone to vibration.
■ Install the horizontal type horizontally, the vertical type (with downward output shaft) and inverted type (with upward output shaft)
vertically. Failure to follow this could result in malfunction due to poor lubrication.
For inclined installation, consult us.
4. Install the product in a way that provides easy access for inspection and maintenance.
■ To make it easy to add and drain lubricating oil, install the product at a level of approximately 10 cm from the 󳞜oor by securing a top
clearance of approximately 30 cm.
■ When installed the product into machines, place it so that the oil level can be checked externally, and lubricating oil can be easily replaced
using pipes.
[ Output shaft direction and installation direction ] [ Installation conditions ]
Note : The output shaft rotation direction for the speed drive equipped with a
Coronet speed reducer (N11, 17, 29, 35, 47, 59, 71 types) is the same as that
of the input shaft.
Installation
Horizontal type
(with horizontal output shaft)
Vertical type
(with downward output shaft)
Inverted type
(with upward output shaft)
Set bolt
Adjustable
speed drive
Output shaft
Coupling
Pulley
Chain sprocket
Gear
Mated machine
Mated machine
Coupling Belt, chain, gear
Speed drive
Speed drive

6
Since the forced cooling system has been adopted, be sure to connect the supplied oil cooler pump unit according to the following procedures.
■ Install the oil cooler pump unit at the same level as the oil gauge level of the speed drive.
■ Be sure to provide a separate power supply from the speed drive motor.
・ Since the speed drive has been shipped with the proper amount of special lubricating oil supplied inside, do not open the oil inlet (outlet)
valves of the speed drive until all hoses have been connected completely.
1.Be sure to connect the main unit and oil cooler pump unit using the supplied rubber hoses (two pieces).
2.Connect “IN” of the connection manifold in the unit to the connecting port on the side of the oil outlet in the speed drive, and “OUT” to
the connecting port on the side of the oil inlet in the speed drive.
For NRXMK-18K (including models equipped with the reducer)
Connection method
1
・ Connect the cooling water hose (needed to be prepared by your company)
to the cooling water 󳞜ow conduit. Pass the cooling water with a 󳞜ow rate
of 20 liter/min.
[Water-cooled system]
Horizontal type
Oil inlet
Pump unit Oil 󳞛lter
Manifold OUT
(Oil outlet)
IN
(Oil inlet)
Cooling water
outlet
Cooling water
inlet
Water-cooled oil cooler
Oil inlet
Oil outlet
Oil outlet
Vertical type
Rubber hoseRubber hose
[Air-cooled system]
Horizontal type
Oil 󳞛lter
Air-cooled oil cooler
OUT
(Oil outlet)
Pump unit
IN
(Oil inlet)
Oil inlet
Oil inlet
Oil outlet
Oil outlet
Vertical type
1-3 Connection with the oil cooler pump unit
2
2-1 Precautions before starting operation
1. Since, unless otherwise requested, the speed drive is filled with the proper amount of lubricating oil before shipping,
additional lubrication is not required *
(Before use, check that lubricating oil has been supplied at the speci󳞛ed level of the oil gauge just in case).
* Note that models with the rod-shaped oil gauge have not been 󳞛lled with lubricating oil.
■ Before use, be sure to remove the (red) pressure-release rubber plug attached to the breather cap at the oil 󳞛lling port. Also, for models
equipped with the reducer (G, W, N types), be sure to remove the (red) pressure-release rubber plug attached to the oil port cap of the reducer.
2.Check that electrical wiring has been performed properly.
3.Check that connection to the mated machine has been performed properly (󳞛tting conditions, centering, etc.).
4. At initial operation, con󳞛rm the rotating direction of the output shaft, and gradually apply the load.
If you operate the speed drive without removing the (red)
rubber plug from the cap, pressure escape routes will be
blocked, which could result in oil leakage.
Operation
Breather cap Red pressure-release
rubber plug
Pressure-release plug
Red rubber plug

7
■Operate the oil cooler pump unit according to the following procedures.
■ Be sure to provide a separate power supply to the pump unit from the speed drive motor.
1 Before operation, be sure to open the oil inlet (outlet) valves (two positions) of the speed drive.
* Operating the pump unit with those valves closed could result in malfunction of the pump unit.
2 Turn the power switch of the oil cooler pump unit ON, and con󳞛rm that there is no problem with oil feeding conditions between the speed drive
main unit and pump unit, then turn the power switch of the speed drive ON.
3 Con󳞛rm the rotation direction of the cooler pump unit motor.
1. Perform wiring so that the motor rotates in a counter-clockwise
direction when viewed from the motor fan side.
2. For the indication position of the rotation direction, refer to the table
on the right.
4 Inspection and cleaning of the oil 󳞛lter
・ The 󳞛lter clogging condition will be indicated by “color” in the detector inside the 󳞛lter on top of the oil cooler pump unit, depending on the degree of use.
For NRXMK-18K (including models equipped with the reducer)
Blue Yellow White
Normal Clean the element Danger (clean or replace the element)
Model Indication position
RXCA-01
RXCW-01 Indicated on the motor
RXCW-01-1
RXCW-01-2 Indicated on the pump unit
Turn the power switch of
the oil cooler pump unit ON
Open the oil inlet (outlet) valves of the speed drive
Turn the power switch
of the speed drive ON
Con󳞛rm that the oil cooler pump
unit has been 󳞛lled with oil
Con󳞛rm that oil has been supplied at the speci󳞛ed
level of the oil gauge in the speed drive
Base
2-4 Operation of the oil cooler pump unit
1. Never turn the speed change handle when operation stops (when the motor is not running).
2. Be careful not to overload.
3.The surface temperature of the speed drive housing under normal operation can reach up to approximately 50ºC higher than
the ambient temperature.
4.If the following events occur, stop operation immediately, and inspect the unit. Take any necessary procedures.
＊ For more details on the above symptoms and possible causes of problems, refer to “ 5 Troubleshooting” on page 11.
5.Switch between forward and reverse rotation after checking that the motor (input) shaft has stopped operation completely.
Instantaneous switching between forward and reverse rotation could result in malfunction.
For NRX, the rotation will not change as long as the load
does not change.
If a load changes greatly, however, the rotation speed will
change even at the same graduation point.
1. Read the graduation on the dial depending on the load.
2. Note that the rotation speed will change if a load changes greatly.
(We recommend using the automatic control when high accuracy
is desired). (*1) Rotation speed for the type without the reducer
2-2 Precautions during operation
2-3 Dial graduation and load
Symptoms Possible causes
・ The temperature suddenly increases.
・ An abnormal, loud noise is suddenly generated.
・ The rotation speed suddenly becomes unstable.
・ Other abnormal events are found.
・ The unit has been overloaded
・ Lubricating oil has been excessively or insuf󳞛ciently used,
or has deteriorated. Or, a different type of lubricating oil has
been used.
・ Bearings and/or drive surfaces have been damaged
・ Improper connecting conditions with the mated machine, etc.
Dial position at 100% load
Dail position at medium load
Mating mark
Dial position at no load
0 rpm at this point with 100% load
20 rpm (when 1800 rpm is input) at
this point with no load (*1)

8
Precautions for the air-cooled pump unit
・ When removing the radiator, drain oil 󳞛rst, and remove the outlet/inlet pipes, four supporting bolts (6 x 15), two pan head screws on the fan side
(4 x 50), fan, and then motor, in this order. If a large amount of oily dust is attached to the radiator, soak in a warm water solution with dissolved
neutral detergent, and rinse in water. After that, blow compressed air on it.
・ Clean oil deposit using solvent (Trichloroethylene) approximately once a year
(Deteriorated oil will be dissolved gradually in the solvent. Leave solvent inside for approximately 30 minutes).
・ When the detector indication ring turns yellow, remove the cover on top of the 󳞛lter,
and clean the element using light oil, etc.
Precautions for the water-cooled pump unit
・ Check that water is always running in the oil cooler pump unit.
・ If there is a risk of water freezing due to being in cold regions, a time of extreme
cold, or when interrupting operation, remove the drain plug of the pump unit, and
drain the water from it.
・ Since accumulated water deposit inside the pump unit could result in a decrease in
cooling function, clean the cooling water conduit once a year.
Note : When cleaning the water conduit, remove the water chamber covers on both sides.
Oil 󳞛lter
Water chamber cover
Cooling water outlet
Inlet openings
Cooling water drain plug
(White) Danger
(Yellow) Clean the element
(Blue) Normal
Detector
● When using the product at especially low temperatures (approximately -30ºC to 0ºC) or high temperatures (approximately 40ºC or more), heat or cold-
resistant lubricating oil and applicable internal parts are required. For details, consult us in advance.
● For purchase of special traction drive oil, contact us or any of the ENEOS Corporation of󳞛ces.
■ Speed change section
For special traction drive oil, the oil lifespan is extremely long, and the replacement interval is very long.
＊ For the replacement interval, refer to the above table.
■ Speed reduction section
Replace lubricating oil described in the above table at the speci󳞛ed replacement interval.
Note 1. For lubricating oil supplied at shipping, contact us accordingly.
2. The oil replacement interval differs depending on conditions of use. In particular atmospheres subject to high humidity and/or active gas, shorten the replacement interval described
in the above table.
3
3-1 Special Lubricating Oil
Lubricating oil plays an important role in power transmission, and also has various effects on burn, wear, and/or rust prevention, and/or cooling.
Since lubricating oil greatly in󳞜uences the performance of the product and product life, be sure to use the special traction drive oil for the speed change
section. The type of lubricating oil differs between the speed change and speed reduction sections. In the event that different types of oil are used,
suf󳞛cient performance may not be attained, or extension of the product life may be greatly in󳞜uenced.
■ The type of lubricating oil differs between the speed change and speed reduction sections. In the event that different types of oil are used, suf󳞛cient performance may not be
attained, or extension of the product life may be greatly in󳞜uenced.
3-2 Replacement of lubricating oil
Installation
Speed drive
Speed drive
model
RX-60 to 3700
NRX-60 to 7500
ARX-60 to 750
SC-200E to 22000C
O-200E to 1500E
RX-5500
7500
NRX-11K
15K
RX-11K to 15K
NRX-18K to 30K
Lubrication
system
Speed change section Gear section
Oil lubrication Forced oil
lubrication Oil lubrication
Type Special traction drive oil for the speed
change section
JIS K 2219
Industrial Gear
Oil Class 2
ISO VG220
Brand
Idemitsu
RINGCONE Traction
Drive Oil TD Oil 10
RINGCONE Traction
Drive Oil TD Oil 22
Daphne Super
Gear Oil 220
ENEOS Bonnoc TS220
Mobil Mobilgear
600XP 220
Showa
Shell
Omala S2G
220
Cosmo Cosmo Gear
SE 220
Replacement
interval
Every 20,000 hours,
or every 4 - 5 years Every 5,000 hours, or every year
Reducer type Planetary/Pinion reducer Inscribed planetary reducer Worm reducer
Speed drive
model
RX-60 / 90
NRX-60 / 90
ARX-60 / 90
RX-200B
NRX-200B / 400B
RX-400 to 7500
NRX-750 to 18K
ARX-400 to 750
SC-200E to 22000C
O-200E to 1500E
RX-90
NRX-90
ARX-90
RX-200B to 15K
NRX-200B to 30K
ARX-400 to 750 RX-90 to 3700
NRX-90 to 5500
ARX-90 to 750
SC-200E to 3700E
O-200E to 1500E
SC-200E to 3700E
O-200E to 1500E
Nominal
reduction ratio G3M / G5M G3M / G5M G3 / G5 / G6 G11 to G71 N(G)11 to 71 C11 to 87 W10 to W30
Reducer frame
number - - - A / B A / B / C D to G H to N -
Lubrication
system Grease Grease Oil Oil Grease Oil Oil
Type(Viscosity) NLGI No.1
Grease
NLGI No.0
Grease
JIS K 2219
Industrial Gear Oil Class 2
ISO VG220
JIS K 2213
Turbine Oil Class 2
ISO VG46
NLGI No.2
Grease
JIS K 2219
Industrial Gear Oil Class 2
ISO VG100
JIS K 2219
Industrial Gear Oil
Class 2
ISO VG320
Brand
Idemitsu
Daphne
Coronex
EP No.1
Daphne Polylex
No.0 Daphne Super Gear Oil 220 Daphne Mechanic Oil 46 -Daphne Super Gear Oil 100 Daphne Super Gear Oil 320
ENEOS Epnoc
Grease AP1
Pyronoc Grease
No.0 Bonnoc TS220 FBK Oil RO46 - Bonnoc TS100 Bonnoc TS320
Mobil Mobilux
EP No.1 - Mobilgear 600XP 220 DTE Oil Medium - Mobilgear 600XP 100 Mobilgear 600XP 320
Showa
Shell
Alvania
EP No.1 Stamina RL No.0 Omala S2G 220 Tellus S2M 46 - Omala S2G 100 Omala S2G 320
Cosmo Dynamax
EP No.1 - Cosmo Gear SE 220 Cosmo Allpus 46 - Cosmo Gear SE 100 Cosmo Gear SE 320
Kyodo
Yushi
Unilube
DL No.1 Excellite EP No.0 - - - - -
Nippeco - - - - NDS Grease - -
Replacement
interval
Every 20,000 hours,
or
every 4 - 5 years
Every 5,000 hours, or every year
Every 20,000
hours, or
every 4 - 5
years
Every 5,000 hours, or every year

9
Model
Horizontal type Vertical type
Speed change
section
Speed change
section
200B 0.2 0.4
400B 0.2 0.4
750 0.5 1.0
1500 0.8 1.9
2200 1.8 2.7
3700 2.5 4.8
5500 2.8 5.4
7500 2.2 5.4
11K 5.0 15
15K 5.0 15
18K 5.0 15
Model Reduction
ratio
Horizontal type Vertical type
Speed
change
section
Speed
reduction
section
Speed
change
section
Speed
reduction
section
200B G3M/G5M 0.2 Grease 0.4 Grease
400B G3M/G5M 0.2 Grease 0.4 Grease
750 G3/6 0.5 0.4 1.0 0.4
1500 G3/6 0.8 0.5 1.9 0.8
2200 G3/6 1.8 1.0 2.7 1.3
3700 G3/6 2.5 1.5 4.8 2.3
5500 G3/6 2.8 1.8 6.5 3.5
7500 G3/6 2.2 1.8 6.5 3.5
11K G3/5 5.0 9.0 15 18.2
15K G3/5 5.0 9.0 15 18.2
18K G3/5 5.0 9.0 15 18.2
Note : For the vertical type, be sure to set the unit vertically before adding oil. If oil
is added with the unit placed horizontally, the amount of oil will differ, and proper
lubrication management cannot be performed. If oil has been added excessively, remove
the drain plug, and drain out surplus oil to adjust the amount.
Note : Before adding oil in the vertical type of models 200B to 1500, be sure to remove the attached pressure relief plug for lubrication, which can be used to release the internal air pressure.
[ For the speed change section ]
■ Add oil up to the speci󳞛ed level of the oil gauge when the speed drive stops.
Note : Continuing operation with insuf󳞛cient oil could result in damage to internal parts.
Check the oil level every day.
■ Never mix different types of oil. Failure to follow this could result in adverse effect due to the change in oil quality.
■ Oil leakage could result in accidents. Wipe away oil spills at the time of 󳞛lling or draining.
■ For the grease lubricated system <Frame A/B/C of N(G)11 to 71>,
additional re󳞛ll is not required in the middle of the replacement interval.
When replacing oil, disassemble the unit for overhaul before lubrication.
[For the speed reduction section]
■ The plug position in the center of the speed reduction section indicates
the proper oil level. Remove the upper lubrication plug and level plug, and
󳞛ll with oil until oil 󳞜ows out of the level plug.
SC・O
N・RX
SC・O
N・RX
(200B, 400B, 750, 11K, or larger models)
(1500 to 7500)
Vertical
type Vertical
type
Lubrication level
(when the unit stops)
Lubrication level
(when the unit stops)
Lubrication level
(when the unit stops)
Horizontal
type
Horizontal
type Oil 󳞛lling port Level plug Level plug
Oil 󳞛lling port Oil 󳞛lling
port
Tube type oil gauge
(The band position
indicates the proper
oil level)
3-3 Oil 󳞛lling and draining
Drain plug
(with the planetary
reducer)
Drain plug
(with the CORONET reducer)
Drain plug
(with the worm reducer)
Drain plug
(with the inscribed
planetary reducer)
NRX □ (L)
Oil 󳞛lling port in the speed
reduction section
Oil 󳞛lling port in the
speed reduction section
Oil 󳞛lling port
in the speed
reduction section
Oil 󳞛lling port in the
speed reduction section
Oil drain port in the
speed reduction section
Oil drain port in the
speed reduction section
Oil drain port in the
speed reduction section
Oil 󳞛lling port in the
speed change section
Oil 󳞛lling port in the
speed change section
Oil 󳞛lling port in the
speed change section
Oil 󳞛lling port in
the speed change
section
Pressure relief plug for lubrication(200B to 1500)
Pressure relief plug for
lubrication(200B to 1500)
Oil 󳞛lling port
Oil 󳞛lling port
Oil 󳞛lling port
Oil 󳞛lling port
Oil level
Oil level
Oil gauge
Oil gauge
Oil gauge
Oil gauge
Oil gauge
Oil gauge
Oil gauge
Oil gauge
Oil gauge
Oil drain port
in the speed
change
section
Oil drain port in the
speed change section
Oil drain port in the
speed change section
Oil drain port in the
speed reduction section
Oil drain port in the speed
change section
Oil drain port
Oil drain port
Oil drain port Oil drain port
Oil gauge
NRX □ - □ -G □ Planetary/Pinion reducer (L)
3-4 Proper amount of oil, and oil filling/draining plug positions
Model 11K, 15K, 18K
Model 11K, 15K, 18K
200B to 7500
200B to 7500
After adding oil, attach the pressure relief plug.

10
Model Speed change
section
Speed reduction section
H□U V□D V□U
200B W10/20/30 0.2 0.25 0.4 0.4
400B W10 0.2 0.25 0.4 0.4
W20/30 0.2 0.5 0.6 0.6
750 W10 0.5 0.5 0.6 0.6
W20/30 0.5 0.7 0.85 0.85
1500 W10 0.8 0.7 0.85 0.85
W20/30 0.8 1.3 1.5 1.5
2200 W10 1.8 1.3 1.5 1.5
W20/30 1.8 2.1 2.7 2.7
3700 W10 2.5 2.1 2.7 2.7
W20/30 2.5 3.3 4.1 4.1
5500 W10 2.8 3.3 4.1 4.1
W20/30 2.8 5.5 7.5 7.5
NRX □ - □ -W □ Worm reducer (L)
Model Reduction
ratio Frame size
Horizontal type Vertical type
Speed change
section
Speed reduction
section
Speed change
section
Speed reduction
section
200B G11/17 A0.2 Grease 0.4 Grease
N29 to 71 B 0.2 Grease 0.4 Grease
400B N11 to 71 B 0.2 Grease 0.4 Grease
750 N11 to 29 B 0.5 Grease 1.0 Grease
N35 to 71 C 0.5 Grease 1.0 Grease
1500 N11 to 29 C 0.8 Grease 1.9 Grease
N35 to 71 D 0.8 0.9 1.9 1.5
2200 N11 to 47 D 1.8 0.9 2.7 1.5
N59 to 71 E 1.8 1.8 2.7 2.4
3700 N11 to 29 D 2.5 0.9 4.8 1.5
N35 to 71 E 2.5 1.8 4.8 2.4
5500 N11 to 47 E 2.8 1.8 5.4 2.4
N59/71 F 2.8 3.2 5.4 4.3
7500 N11 to 35 E 2.2 1.8 5.4 2.4
N47 to 71 F 2.2 3.2 5.4 4.3
11K C11 to 43 H 5.0 4.6 15 7
C87 L 5.0 15 15 18
15K C11 to 43 H 5.0 4.6 15 7
C87 L 5.0 15 15 18
18K C11/21 H5.0 4.6 15 7
C29/43 L5.0 15 15 18
NRX □－□ - □ Inscribed planetary reducer(L)
N
C
200B to 7500200B to 7500
Model 11K, 15K, 18KModel 11K, 15K, 18K
Oil 󳞛lling port in the
speed reduction section
Oil 󳞛lling port in the
speed reduction section
Oil drain port in the
speed reduction section Oil drain port in the speed reduction section
Oil 󳞛lling port in the speed
change section
Oil level
Oil level
Oil drain port in the speed
change section
Oil gauge
H□U V□D V□U
Oil 󳞛lling port in the speed
reduction section
Oil drain port in the
speed reduction section
Oil 󳞛lling port in the
speed change section
Oil level
Oil gauge
Oil drain port in the
speed change section
Oil 󳞛lling port in the
speed reduction section
Oil drain port in the
speed reduction section
Oil 󳞛lling port in the
speed change section
Pressure relief plug for lubrication(200B to 1500)
Oil level
Oil gauge
Oil drain port in the
speed change section
Oil 󳞛lling port in the speed
reduction section
Oil drain port in the speed
reduction section
Oil 󳞛lling port in the speed
change section
Oil gauge
Oil gauge
Oil drain port in the
speed change section
Oil 󳞛lling port in the speed
reduction section
Oil drain port in the speed
reduction section
Oil 󳞛lling port in the speed
change section
Oil gauge
Oil gauge
Oil drain port in the speed
change section

11
4
1.Check to ensure that the speed drive housing temperature is not extremely high during operation.
＊ A temperature of up to approximately 50ºC higher than the ambient temperature will not cause any problems.
2.Check to ensure that there are no abnormal rolling sounds with the bearings and/or friction
transmission parts.
3.Check to ensure that abnormal vibration is not being generated from the speed drive.
＊ If any of these abnormal events occur, stop operation immediately, disassemble and inspect the unit, or contact us.
4.Con󳞛rm that oil has been supplied at the speci󳞛ed level of the oil gauge (Check when the unit stops).
5.Check to ensure that the oil has not been contaminated. Check to ensure that oil gauge is
transparent enough.
6.Check to ensure that there is no oil leakage anywhere (for example, in oil seals on the input and
output shaft parts, O-rings, oil gauge, and/or the area around the oil 󳞛lling and drain ports, etc.).
＊ If any oil leakage occurs, replace the necessary parts, or contact us.
1.Check to ensure that there is no excessive overload.
2.Check to ensure that pulleys, sprockets, and speed drive mounting
bolts are not loose.
3.Check to ensure that there are no problems in the electrical system.
4. Inspect and maintain major parts.
* If abnormal sounds occur inside of the speed drive, stop operation immediately,
disassemble and inspect the unit, or contact us.
5.Check to ensure that the speci󳞛ed time of replacement for
lubricating oil has not passed.
* Check to ensure that oil level has not decreased, and that it's not dark in
color. Check the speci󳞛ed replacement interval.
4-1 Daily inspection 4-2 Periodical inspection
Periodical Inspection
(approximately at least
every three months)
5
Troubleshooting
Symptoms Possible causes Remedies
When load is applied
The unit does not
rotate (drive)
Fuse has blown Abnormal load may have been applied After inspection, decrease load to the speci󳞛ed level
Fuse capacity may be insuf󳞛cient Replace with a fuse with the speci󳞛ed capacity
Load is excessive Speed drive capacity may be insuf󳞛cient Check the model and type again
Pressure contact of the driving
surface may be defective Inspect the pressure contact condition, and replace worn parts, if necessary
The mated machine and its connecting mechanism have malfunctioned After inspection, adjust or repair
The unit rotates
(drives)
Temperature has
increased abnormally
(overheating)
Pressure contact of the driving surface
may be excessive Adjust the pressure contact condition
Voltage may decrease Consult the power company
Load is excessive After inspection, decrease load to the speci󳞛ed level
High viscosity oil Replace with the speci󳞛ed or equivalent oil
The amount of oil may be excessive,
insuf󳞛cient, or oil may be deteriorated Replace with the speci󳞛ed or equivalent oil (in the speci󳞛ed amount)
The rotation speed
has been unstable
The connecting part with the mated
machine may be defective After inspection, adjust or repair
High viscosity oil Replace with the speci󳞛ed or equivalent oil
Slipping occurs Load is excessive After inspection, decrease load to the speci󳞛ed level
Pressure contact of the driving
surface may be defective Adjust the pressure contact condition
The driving surface may have been worn Replace the ring and cone with normal parts
Slipping does not
occur
Electric power may decrease Consult the power company
Load is excessive After inspection, decrease load to the speci󳞛ed level
Abnormal sound
is heard
The unit may be running with the missing phase
(Three phases may be functioning as one phase) Inspect electric wires, and/or consult the power company
Sound has changed
when changing the
speed
Bearing on the output side may be damaged Replace the bearing
The drive surface on the output side
may be damaged Replace the ring and cone with normal parts
Sound has not
changed even when
changing the speed
Bearing on the input side may be damaged Replace the bearing
The drive surface on the input
shaft side may be damaged Replace the ring and cone with normal parts
When no load is applied
The motor key section may be damaged Replace the key and shaft with normal parts
The unit does not rotate (start)
The ring and cone may be disconnected Reapir the unit
The ring and cone may have contact failure Adjust the shim
Fuse may have blown Adjust terminal contact, or replace the fuse
The switch may have contact failure Adjust the contact part
The stator coil may have been disconnected Repair at a specialized factory
The connecting wire may have been
disconnected After inspecting the disconnected part, replace
Bearing may be damaged Replace the bearing
The connecting wire may have been
disconnected in one phase Replace with a complete set
The unit rotates
(starts)
The unit rotates
in the reverse direction Wiring connection may be incorrect Replace two of three power leads
The rotation speed
has not increased
The switch may have contact failure
(Governor switch on the single phase) Adjust the contact part
The stator coil may have been
short-circuited in one phase Repair at a specialized factory
The rotor may come into contact with the stator Replace the bearing, or repair at a specialized factory
High viscosity oil Replace with the speci󳞛ed or equivalent oil
The driving surface may have been worn Replace the driving part with a normal part
Abnormal sound
is heard
Sound has changed
when changing the
speed
Bearing on the output side may be damaged Replace the bearing
The drive surface on the output side
may be damaged Replace the ring and cone with normal parts
Sound has not
changed even when
changing the speed
Bearing on the input side may be damaged Replace the bearing
The drive surface on the input shaft side
may be damaged Replace the ring and cone with normal parts
The motor key section may be damaged Replace the key and shaft with normal parts
● Oil leakage occurs
O-ring may be defective Replace the deformed or cracked O-ring with a normal part
Oil seal may be defective Replace the hardened or deformed oil seal with a normal part
Mounting bolts may be loose Tighten the bolts properly
Lubricating oil may be excessive Adjust to the speci󳞛ed amount
Packing or bonding agent
may not have been 󳞛xed Apply the bonding agent evenly Replace the packing with a normal part
The pressure-release rubber plug
may have been left Remove the rubber plug

12
Note : Since models larger than the medium-scale type (1.5 kW type), and those equipped with the reducer have heavy parts, hoist or crane equipment may be required at the time of disas-
sembly and reassembly.
Note : When disassembly and reassembly are performed by our workers, please have your company remove and mount the speed drive.
6
● Perform reassembly in the reverse order of disassembly.
● Put packing in joint parts between the M 󳞜ange/output shaft holder/motor and the
main unit housing/covers. In such cases, replace deformed or cracked packing with
normal one.
* When reassembly is complete, adjust pressure contact force inside according to
“6-3 Shim (pressure contact force) adjustment” .
● Since shim (pressure contact force) has been sufficiently adjusted at shipping, readjustment is not necessary before use.
When disassembly and reassembly have been performed due to unavoidable circumstances, readjust shim according to the following procedure.
NRX □ *For models with the reducer, refer to the respective page.
● Adjustment procedure
When reassembly is complete after disassembly, in order for the “automatic pressure adjustment mechanism” to function effectively, adjust pressure
contact force using the shim inside the bearing cover.
･When reassembling the speed change section, move the ring to the low speed end (output shaft) in advance.
● Procedure
(1) Tighten the bearing cover completely.
(2) Mount a pulley on the output shaft, and manually turn the pulley from side to side to seat internal parts.
If problems or malfunction have occurred in the unit, and disassembly inspection is required, refer to the disassembly and reassembly 󳞛gures on the following
pages, and perform accordingly (refer to “ 5 Troubleshooting” on page 11).
(3) When turning the pulley from side to side, check that output shaft
backlash is within the range of values in the table below.
If backlash is too large or small, remove the bearing cover, and
adjust to the normal value by increasing or decreasing the shim
(0.1 mm to 0.2 mm thick).
(3) Remove the top cover.
(4) Look into the inside of the main unit, and check that clearance between the
cam disc and input cam is within the range of values in the table below.
If clearance is too large or small, remove the bearing cover, and adjust to the
normal value by increasing or decreasing the shim (0.1 mm to 0.2 mm thick).
NRX □ -3700 to 18K
Adjust by clearance between the cam disc and input cam
NRX □ -200B/400B
NRX □ -750 to 2200
Adjust by output shaft backlash
Model Output backlash
200B/400B
750/1500 1°to 3°
2200 After adjusting to 1º to 3º,
add a shim 0.2 mm thick.
Model Clearance of the cam disc
3700 to 18K
Adjust clearance to 0 to 0.1 mm, and add a
shim 0.1 mm to 0.15 mm thick (0.05 mm to 0.1
mm thick when applying pressure).
Cam retainer
1°to 3°
Shim Shim
Input cam
Cam disc
Clearance
6-1 Disassembly procedure
6-3 Shim (pressure contact force) adjustment
6-2 Reassembly procedure
(5) When shim (pressure contact force) adjustment is complete, mount the top
cover, and set the dial.
Under no load, align the mating mark with 0 (zero) for NO LOAD on the dial,
and tighten using the bolt.
(4) When shim (pressure contact force) adjustment is complete,
mount the top cover, and set the dial.
Under no load, align the mating mark with 0 (zero) for
NO LOAD on the dial, and tighten using the bolt.
(1) Remove the plug from the oil drain port, and drain oil completely.
(2) Remove the top cover.
(3) Remove the output shaft assembly from the main unit.
(4) Remove the cam assembly from the output shaft assembly.
(5) Remove the cone assembly.
(6) Remove the ring assembly.
(7) Remove the input disc from the motor shaft.
・ Inspection & Washing
・ After disassembly, inspect each part, and wash all parts with washing oil.
・ Replace defective parts with normal ones.
Keep all disassembled parts away from dust
until reassembly.
Disassembly & Reassembly

13
NRX - -G with planetary reducer
NRX - -W with worm reducer
●When reassembly of the speed change and reduction sections is complete after disassembly, adjust pressure contact force
according to the following procedure.
●When reassembling the speed change section, move the ring to the low speed end (output shaft) in advance.
● Procedure
(1) Remove the top cover in the speed change section, look into the inside, and adjust pressure contact force according to the following procedure.
(2) Only for W type (with worm reducer), loosen the hexagon socket set screw. *Refer to the disassembly and reassembly diagram for the worm reducer section on page 19
NRX □ -200B to 2200-G □
NRX □ -200B to 2200-W □
Adjust by cam retainer backlash
NRX □ -3700 or larger -G □
NRX □ -3700 or larger -W □
NRX □ -11K to 18K-C □ H/L
Adjust by clearance between the cam disc and input cam
Model Cam retainer backlash
200B/400B
750/1500 1°to 3°
2200 After adjusting to 1º to 3º,
add a shim 0.2 mm thick.
Model Clearance of the cam disc
3700 to 18K
Adjust clearance to 0 to 0.1 mm, and add a
shim 0.1 mm to 0.15 mm thick (0.05 mm to 0.1
mm thick when applying pressure).
(3) Hold the cam retainer with pliers, etc., and check that the total
backlash is within the range of values in the table below.
If backlash is too large or small, remove the bearing cover (HS blind
cover for W type), and adjust to the normal value by increasing or
decreasing the shim (0.1 mm to 0.2 mm thick).
(4) Only for W type (with worm reducer), tighten the hexagon socket set screw after shim (pressure contact force) adjustment.
(5) Set the dial.
* Refer to the procedure for the standard NRX □ on page 12.
(3) Look into the inside of the speed drive, and check that clearance between
the cam disc and input cam is within the range of values in the table below.
If clearance is too large or small, remove the bearing cover (HS blind cover
for W type), and adjust to the normal value by increasing or decreasing the
shim (0.1 mm to 0.2 mm thick).
Cam retainer
Input cam
Cam disc
Clearance
Cam retainer
Cam disc
1°to 3°

14
NRX - -N with CORONET reducer ● For NRX □ -11K to 18K-C □ , follow the procedure on page 13.
●When reassembly of the speed change and reduction sections is complete after disassembly, adjust pressure contact
force according to the following procedure.
●When reassembling the speed change section, move the ring to the low speed end (output shaft) in advance.
● Procedure
(1) Put a rod (T-wrench) etc. into the ER 󳞜ange adjustment hole, and align the ER 󳞜ange and adjuster surfaces on the same level by turning the
adjuster. After that, assemble the main units of the speed reduction and change sections.
(2) Remove the top cover in the speed change section, look into the inside, and adjust pressure contact force by turning the adjuster with a rod (T-wrench)
etc. according to the following procedure.
(3) Check pressure contact force adjustment according to the tables below.
(Turning the adjuster clockwise increases contact force, and turning counterclockwise decreases contact force when viewed from the output shaft)
Adjuster 󳞛xing bolt
Adjuster
Cover
ER 󳞜ange
Align the surfaces
on the same level
Adjuster 󳞛xing bolt
Adjuster
Rod (T-wrench)
Casting hole
To increase
contact force
To decrease
contact force
ER 󳞜ange
Cover
NRX □ -200B to 2200-N □
Adjust by cam retainer backlash
NRX □ - 3700 to 7500-N □
Adjust by clearance between the cam disc and input cam
Model Cam retainer backlash
200B/400B
750/1500 1°to 3°
2200 After adjusting to 1º to 3º, turn the adjuster by
one pitch to increase contact force
Model Clearance of the cam disc
3700 to 7500 After adjusting clearance to 0 to 0.1 mm, turn the
adjuster by one pitch to increase contact force
(4) Hold the cam retainer with pliers, etc., and check that the total
backlash is within the range of values in the table below.
If backlash is too large or small, turn the ER 󳞜ange adjuster, and
make adjustment.
(5) When shim (pressure contact force) adjustment is complete, secure the adjuster using the 󳞛xing bolt, and set the blind bolt on the other side.
Note : The 󳞛xing bolt is used to keep the adjuster from turning. Keep the tip of the bolt from coming into contact with the bottom of the adjuster.
(4) Look into the inside of the speed drive, and check that clearance
between the cam disc and input cam is within the range of
values in the table below.
If clearance is too large or small, turn the ER 󳞜ange adjuster,
and make adjustment.
Cam retainer
Input cam
Cam disc
Adjuster
ER 󳞜ange
Blind bolt
Fixing bolt
Clearance
Clearance
Cam retainer
Cam retainer
Cam disc
1°to 3°
(6) Set the dial.
*Refer to the procedure for the standard NRX □ on page 12.

15
R
34
35
36
37
38
A
B
71
G
S
71
D
74
E
76
77
F
78
79
80
82
18 20
21
17
23
22
19
17
16
15
B
13
12
C
11
11
10
101
104
Flange type
Base type
10
A
10
71
NRXM-200B to 3700
NRXMK-5500/7500
Speed reduction section
Speed reduction section
Automatic control specifications
Input disc includes bearings
(Only for the vertical
and inverted types)
Input disc includes bearings
(Only for the vertical and inverted types)
For 5500/7500
For 3700 or larger
For 750 or larger
For details, refer to
pages 18 to 21
Output shaft section
For details, refer to pages 18 to 21
For details, refer to page 23
For details, refer to page 23
Automatic control specifications
Speed change operation section Only for the vertical type
Input shaft section * For NRXK-200B to 7500 (coupling type), refer to page 16
Speed change section
37
8
9
26
30
28
29
102
103 105
27
2
1
10
G
71
For 2200/3700
D
82
5
5
6
For 3700 or larger
4
4
25
24
A
B
For 750
or larger
81
10
For
200B/
400B
Output shaft A Output shaft B Output shaft C Input disc D Input disc G Motor shaft E Motor shaft F
200B/400B 6203ZZ 6203 - 51204 - - -
750 6204ZZ TMB204 51204 51305 - - -
1500 6206ZZ 6206 51206 51405 - - - 2200 6207ZZ 6207 51207 51407 6008 - - 3700 6208ZZ 6307 51307 51408 6010 - -
5500/7500 6210ZZ 6308 51308 51410 6011 6210LLU 6011LLU
Oil seal name number list
Output shaft R Input shaft S
200B/400B D17328 -
750 D20358 -
1500 D30458 - 2200 D35508 - 3700 D40588 -
5500/7500 D507212 S507212
Model
Seal position
Disassembly and reassembly diagram for speed change section NRXM(K)-200B to 7500
1
* For the speed reduction section, refer to the disassembly and reassembly diagram for the respective speed reduction
section on pages 18 to 21.
Cone retainer Cone Ring Rubber packing Washer Guide shaft Base Hexagon socket plug Housing Snap Ring Shaft Collar Needle collar Output shaft Output cam Cam retainer Cam disc Input cam Auxiliary spring Spring Needle roller Spring seat R-Snap ring Rack gear holder Rack gear Packing (cover part) Cover Handwheel
1 2 3 4 5 6 7 8 9
10 11 12 13 15 16 17 18 19 20 21 22 23 24 25 26 27 28
Dial Plate Breather cap Bearing cover O-ring Shim Output shaft holder
Packing (on the output shaft side) Input disc Input shaft holder Fan Motor shaft Snap Ring Shaft Wave washer Fan cover Packing (on the input shaft side) Motor Vertical 󳞜ange Oil 󳞛lling tube Male and female elbow Nipple, Elbow, Plug Air release plug A to G: Bearing R, S: Oil seal
29 30 34 35 36 37 38 71 74 76 77 78 79 80 81 82
101 102 103 104 105
Bearing name number list
Parts list
A, B, E, F, G: Ball bearing (ZZ: metal seal type, LLU: contact rubber seal type) C, D: Thrust bearing Vertical type of NRXM(K)-200B/400B *The bearing type on the output shaft A is LLU. When the sensor gear is attached, the bearing type on the output shaft B is also LLU. Inverted type of NRXM(K)-750 or larger *The bearing type on the output shaft A and B is LLU.
Model
Bearing position

16
Motor shaft S
200B/400B S20358
750 S25408
1500 S25408 2200 S35508 3700 S40558
5500/7500 S507212
10
G
71
10
G
71
76
71
D
71
D
78
77
83 (For 400 or larger)
79
80
F
F
74
75
108
81
81
S
E
SE
NRXK-200Bto3700
NRXK-5500/7500
77
For 2200/3700
For details, refer to page 15
Speed change section RXK (Coupling)
Only for the vertical and inverted types
(Input disc includes bearings)
Only for the vertical and inverted types
(Input disc includes bearings)
NRXK
* For the speed change section, refer to page 15.
Bearing name number list Oil seal name number list D: Thrust bearing E, F, G: Ball bearing (ZZ: metal seal type, LLU: contact rubber seal type)
Input disc D
Input shaft E Input shaft F Input shaft G
200B/400B 51204 6005ZZ 6005ZZ -
750 51305 6007ZZ 6007ZZ -
1500 51405 6008ZZ 6008ZZ - 2200 51407 6209ZZ 6209ZZ 6008 3700 51408 6209ZZ 6209ZZ 6010
5500/7500 51410 6210LLU 6211LLU 6011
Model
Bearing position
Model
Seal position
Disassembly and reassembly diagram for speed change section input shaft NRXK-200B to 7500
2
Parts list
Snap Ring Shaft Input disc Input shaft holder Rubber plug Fan Motor shaft Snap Ring Shaft Wave washer Fan cover Packing (on the input shaft side) R-Snap ring D, E, F, G: Bearing S: Oil seal Motor 󳞜ange
10 71 74 75 76 77 78 79 80 81 83
108

17
30
26
29
33
32
31
28
102
105
103
27
R
35
34
36
37
38
10
A
10
11
B
13
C
15
16
18
20
21
17
19
22
23
4A
B
104
101
6
7
8
9
81
H71
2
82
70
71
D
96
106
74
S
E
76
77
F
79
80
3
1
4
5
25
24
B
A
5
107
Only NRXMK-18K
comes with a valve
for cooler
41
42
Base type
Flange type
Speed change section
Output shaft section
For details, refer to
pages 19 and 22
Speed reduction section
Speed reduction section
Automatic control specifications
For details, refer to pages 19 and 22
For details, refer to page 23
Input disc includes bearings
(Only for the vertical and inverted types)
(Only for the vertical type)
(Only for the vertical type)
Only for the vertical type
Input shaft section
Automatic control specifications Speed change operation section
For details, refer to page 23
NRXMK-11K to 18K
*For details on the speed reduction section, please refer to the disassembly and reassembly diagram for the respective speed reduction section on pages 19 and 22.
A, C, E, F, G, H: Ball bearing (ZZ: metal seal type, LLU: contact rubber seal type) B, D: Thrust bearing
Output shaft A Output shaft B Output shaft C Input disc D Input disc H Motor shaft E Motor shaft F
11K,15K
6312ZZ
6312LLU for the
inverted type
81212
6312ZZ
6312LLU for the
inverted type
89315 6013 6213LLU
6212LLU
18K 6213LLU
Output shaft R Motor (Input) shaft S
11K to 18K D608212 S659013
Disassembly and reassembly diagram for speed change section NRXMK-11K to 18K
3
Bearing name number list
Bearing position
Model
Oil seal name number list
Model
Seal position
Cone retainer Cone Ring Rubber packing Washer Guide shaft
Cam retainer Cam disc Input cam Auxiliary spring Spring Needle roller Spring seat R-Snap ring Rack gear holder Rack gear Packing (cover part) Cover Handwheel Dial Plate Breather cap Hexagon socket bolt Spring washer Eye bolt
1 2 3 4 5 6
7 8 9
10 11 13 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
Bearing cover O-ring Shim Output shaft holder
Packing (on the output shaft side) Valve (on the outlet side) Valve (on the inlet side) Snap Ring Shaft Input disc Input shaft holder Fan Motor shaft Wave washer Fan cover Packing (on the input shaft side) Motor Collar B Vertical 󳞜ange Oil 󳞛lling tube Male and female elbow Nipple, Elbow, Plug Breather plug Oil plate Shaft washer A to F: Bearing R, S: Oil seal
34 35 36 37 38 41 42 70 71 74 76 77 79 80 81 82 96
101 102 103 104 105 106 107
Parts list Base
Plug Housing Snap Ring Shaft Collar Output shaft Output cam

18
212
210
2C
2E 219
220
221
2D
219
211
218
213
213
217
2D
216
2C
206
209
215
214
207
2B
210
2A
204
202
2R
201
281
2S
212
210
2B
208
203
2A
205
203
202
201
206
215
214
281
2R
2C
2D 2D
220
221
222
222
219
211
218
213
218
210
211
211
213
2F
220
219
219
2C
221
222
222
218
213
2F
220
219
221
222
222
210
2C
2
1
17
16
15
38
226
225
2G
224
223
2S
2S
G6
G3
NRXM(K)-200B/400B-G3M/G5M
750
1500 to 7500
2200 to 7500
750/1500
NRXM(K)-750 to 7500-G3/G6
Base type
Base type
Flange type
Flange type
Input shaft section
Speed change section
Only for 1500 to 7500
For details on the speed change
section, refer to page 15
Speed reduction section
200B/400B
*For the speed change section, refer to page 15.
Bearing name number list
G3M/G5M
2A, 2B, 2C, 2D: Ball bearing (ZZ: metal seal type) The bearing type on the input shaft 2C/2D for the inverted type is LLU when the sensor gear is attached.
Output shaft
2A
Output shaft
2B
Input shaft
2C
Input shaft
2D
200B/400B 6205ZZ 6304ZZ 6204ZZ 6303
750 to 7500
Bearing name number list
G3 / G6
Output shaft
2A
Output shaft
2B
Output shaft
2C
G3 G6
Input shaft
2G
Planetary gear 2D Planetary gear 2E Planetary gear 2F
750 6206LLU 6007 4T-30203 HK 1212(2)
IR 8×12 ×12.5(2)
6200(3) 6203ZZ
1500 6207LLU 6009 4T-30204 HK 1516(2)
IR 12 ×15 ×16.5(2)
6202(3) 6205ZZ
2200 4T-30208 6010 4T-30205 6001(4) -6203(3) 6206ZZ 3700 4T-30210 6012 4T-30206 6002(4) -6204(3) 6207ZZ
5500/7500 4T-30211 6013 4T-30207 6002(4) -6305(3) 6208ZZ
Oil seal name number list
Output shaft 2R Input shaft 2S
200B/400B D25408 S20358
Oil seal name number list
Output shaft 2R Input shaft 2S
750 D30458 S 25408 (2)
1500 D35508 S 32458 (2) 2200 D40588 S 38558 (2) 3700 D50729 S 42659 (2)
5500/7500 D55729 S 50729 (2)
Disassembly and reassembly diagram for planetary reducer section NRXM(K)-200B/400B-G3M, G5M / NRXM(K)-750 to 7500-G3, G6
1
Model
Bearing position
Model
Seal position
Model
Bearing
position
Model
Seal position
The number of pieces is indicated in brackets. The number of pieces without bracket indication is one.
The number of pieces is indicated in brackets. The number of pieces without bracket indication is one.
2A: Ball bearing or taper roller bearing (LLU: contact rubber seal type) 2B, 2F, 2G: Ball bearing (ZZ: metal seal type) 2C: Taper roller bearing 2D: Needle bearing or ball bearing 2E: Shaft washer
Parts list
Cone retainer Cone Output cam Cam retainer Cam disc Packing (on the output shaft side) Base A Gear case Plug Packing O-ring Shim R-Snap ring Snap Ring Shaft Matex unit Output shaft Spring pin Input gear Input shaft Bearing cover O-ring Joint Middle 󳞜ange Planetary gear pin Collar Planetary gear E-Snap ring R-Snap ring Coupler Air release plug Spacer Base B Vertical 󳞜ange 2A to 2G : Bearing 2R, 2S: Oil seal
1 2
15 16 17 38
201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 281
Each part has been assembled in the speed reduction section. For replacement, the reducer assembly needs to be replaced.

19
402
4A
4C
415
413
15
16
17
1
2
38 226
412
414
4A
4R
416 4S 4S
417
410 407
408
411
409
409
406
4B
4B
405
404
401
403
Input shaft section
For details on the speed change section, refer to page 15
Speed change section
Speed reduction section
2C 2D
38
2
1
17
13
39
2Ｂ266
272
268
265
264
2A
2R
Input shaft section
Speed change section
For details on the speed change section, refer to page 17
R35
34
36
NRXMK-11K to 18K-G3,G5
270267255273260276
254
2B
2A
269
262 259 278 258 277
253
2C
251 257 256 263 261 2D
2R
*For the speed change section, refer to page 17.
Bearing name number list
2A, 2B, 2C, 2D: Tapered roller bearing
Bearing position Output shaft
2A
Output shaft
2B
Pinion shaft
2C
Pinion shaft
2D
Speed drive model Reduction ratio
11K to 18K G3/G5 HR32216J HR32213J HR30308J HR32207J
*For the speed change section, refer to page 15.
NRXM(K)-200B to 5500-W10/W20/W30
Output shaft
4A
Worm shaft
4B
Worm shaft
4C
200B W10
6204LLU(2) 7203 BDF(2)
6905
W20 / 30
400B W10
W20 / 30 6205LLU(2) 7204 BDF(2) 6005
750 W10 6204
W20 / 30 6206LLU(2) 7304 BDF(2) 60/28
1500 W10
W20 / 30 6207LLU(2) 7305 BDF(2) 6007
2200 W10
W20 / 30 6208LLU(2) 7306 BDF(2) 6910
3700 W10
W20 / 30 6210LLU(2) 7308 BDF(2) 6210
5500 W10
W20 / 30 6212LLU(2) 7309BDF(2) 6211
Disassembly and reassembly diagram for planetary and pinion reducer section 2
Oil seal name number list
Seal position Output shaft
R
Output shaft
2R
Speed drive
model Reduction
ratio
11K to 18K G3 / G5 D608212(2) D8010513
The number of pieces is indicated in brackets. The number of pieces without bracket indication is one.
Cone retainer Cone Speed drive output shaft Cam disc (on the output shaft side) Bearing cover O-ring Shim Packing Coupler Housing Cover on the low speed side Bearing housing on the low speed side Primary pinion Primary gear Secondary pinion Secondary gear Output shaft Key for the primary pinion Key for the primary gear Key for the secondary gear Spacer for the secondary pinion shaft
Drain plug Oil gauge Vent hole Eye bolt Pin for the cover on the low speed side Locknut for the primary pinion Stud bolt for the high speed ring Bolt for the cover on the low speed side Bolt for the bearing housing on the low speed side Packing for the cover on the low speed side Secondary pinion Shim for the shaft bearing Shim for the low speed shaft bearing 2A to 2D : Bearing R, 2R : Oil seal
1 2
13 17 34 35 36 38 39
251 253 254 255 256 257 258 259 260 261 262 263
264 265 266 267 268 269 270 272 273
276
277 278
Parts list
Each part has been assembled in the speed reduction section. For replacement, the reducer assembly needs to be replaced.
Disassembly and reassembly diagram for worm reducer section
Bearing name number list The number of pieces is indicated in brackets. The
number of pieces without bracket indication is one.
Model
Bearing position
4A, 4C: Ball bearing (LLU: contact rubber seal type) 4B: Angular bearing
Output shaft
4R
Worm shaft
4S
200B
W10
/
20
/
30
S 20358 S 25357 (2)
400B W10
W20 / 30 S 25408 S 25357 (2)
750 W10 S 20358 (2)
W20 / 30 S 305011 S 28408 (2)
1500 W10
W20 / 30 S 355511 S 35508 (2)
2200 W10
W20 / 30 S 406212 S 50659 (2)
3700 W10
W20 / 30 S 507212 S 50729 (2)
5500 W10
W20 / 30 S 608212 S557812(2)
Oil seal name number list
The number of pieces is indicated in brackets. The number of pieces without bracket indication is one.
Model
Seal position
Parts list
Cone retainer Cone Output cam Cam retainer Cam disc Packing (on the output shaft side) Base B Stand HS blind cover Oil check plug Shim Snap Ring Shaft Worm shaft Housing Oil 󳞛lling plug Hexagon socket set screw O-ring LS blind cover LS cover O-ring Output shaft Worm shaft wheel Flange Collar 4A, 4B, 4C: Bearing 4R, 4S: Oil seal
1 2
15 16 17 38
226 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417