Nabtesco RV E Series User manual

ERD15014B
Oct 1, 2016
Precision Reduction Gear RVTM
E series
C series
Original series
Operation Manual
<Applicable model>
RV-△E , RV-△C , RV-
above indicates the torque code.
above indicates the series code.
For the applicable models, refer to “Model” indicated on the shipping label of the product.
This manual must be thoroughly read and understood before using the product.
Be sure to deliver this operation manual to the system manager and the person in
charge of the operation.
Keep this manual in the specified location so that it can be immediately referred to
whenever necessary.
®

Contents
Important Information ...................................................................................................... i
1. Intended use of this product ..................................................................................................................................... i
2. Rules to ensure safe use of this product................................................................................................................... i
3. Sharing of hazard information with users............................................................................................................... ii
4. Product disposal...................................................................................................................................................... ii
5. Other important notes .............................................................................................................................................ii
About This Manual .......................................................................................................... iii
1. Users of this manual .............................................................................................................................................. iii
2. Copyrights.............................................................................................................................................................. iii
Warranty .......................................................................................................................... iv
Glossary ........................................................................................................................... v
Chapter 1 About safety.................................................................................................... 1
1.1. About warnings..................................................................................................................................................... 1
1.2. Type and indication of warning ............................................................................................................................ 1
1.3. General precautions .............................................................................................................................................. 2
Chapter 2 Product overview............................................................................................ 3
2.1. Name of each section............................................................................................................................................ 3
2.2. Parts codes of catalog products............................................................................................................................. 4
Chapter 3 Transportation and storage of product......................................................... 5
3.1. Transportation....................................................................................................................................................... 5
3.2. Storage .................................................................................................................................................................. 6
Chapter 4 Preparations for installation .......................................................................... 7
4.1. Installation environment ....................................................................................................................................... 7
4.2. Preparation of required components ..................................................................................................................... 8
4.3. Unpacking........................................................................................................................................................... 19
4.4. Lifting of this product......................................................................................................................................... 23
Chapter 5 Installation..................................................................................................... 24
5.1. Bolt tightening torque ......................................................................................................................................... 24
5.2. Installation work ................................................................................................................................................. 25
Contents

Contents
Chapter 6 Filling the Lubricant ..................................................................................... 53
6.1. Precautions when handling the lubricant ............................................................................................................ 53
6.2. Reduction gear mounting direction and amount of lubricant.............................................................................. 55
6.3. Lubricant filling procedure ................................................................................................................................. 61
Chapter 7 Operation....................................................................................................... 63
7.1. Checking before operation.................................................................................................................................. 63
7.2. Running-in operation .......................................................................................................................................... 63
7.3. Precautions for operation .................................................................................................................................... 63
Chapter 8 Maintenance and inspection........................................................................ 65
8.1. Precautions on maintenance................................................................................................................................ 65
8.2. Daily inspection .................................................................................................................................................. 65
8.3. Lubricant replacement ........................................................................................................................................ 66
8.4. Troubleshooting checksheet................................................................................................................................ 69
Appendix: Design Scheme of Input Gear ...................................................................... 68
CONTACT INFORMATION

Important Information
i
1. Intended use of this product
This product was designed and manufactured as a reduction gear that decelerates the rotation of the
motor and transmits the rotational torque. Do not use this product for other purposes.
Do not modify the reduction gear or use it outside its specified range. This could cause injury or
damage to the reduction gear.
The specifications indicated in the product catalog are based on Nabtesco evaluation methods. This
product should only be used after confirming that it is appropriate for the operating conditions of
your system. This could cause injury or damage to the reduction gear.
2. Rules to ensure safe use of this product
It is impossible for Nabtesco Corporation (referred to as “Nabtesco” hereafter) to foresee any potential
hazards related to this product and hazards caused by human errors or peripheral devices.
There are also various points that must be observed and operations that are prohibited in relation to the
use of this product, but it is also impossible to note all of them in this manual.
For this reason, it is necessary to take appropriate safety measures when operating this product, in
addition to the points noted in this manual.
The particularly important information for safe handling of this product is noted below. This
information applies to all workers involved, including the manager and supervisor of this product.
The “procedures” referred to in this manual indicate all the acts performed on this product during
transportation, installation, operation, and maintenance/inspection.
Be sure to read this manual
Before using this product, thoroughly read this manual and understand all the content of this manual.
Also, observe the safety precautions described in this manual.
Conditions for workers
The worker must have a fundamental knowledge of this product
The worker must be aware of the potential hazards of this product and have adequate knowledge to
avoid hazardous situations
The worker must be able to take appropriate measures to avoid hazardous situations
Important Information

Important Information
ii
Observe the relevant laws, regulations, ordinances, and bylaws.
Observe the relevant laws, regulations, ordinances, and bylaws enacted by the related countries and
local governments.
Prevention of accidents
To prevent accidents, do not perform any procedures not noted in this manual. Also, do not use this
product for any purposes other than those noted at the beginning of this manual.
If any abnormalities are found, take appropriate measures immediately to prevent any accidents,
serious injury, or damage.
Everyone, including workers and supervisors, must voluntarily take measures to ensure safety and
well-being, as this can prevent accidents.
3. Sharing of hazard information with users
When selling or transferring this product embedded in a device, etc., hand this manual to the person
who actually uses or manages the device (the person/group in charge). Or, add the necessary
information concerning handling and maintenance procedures for preventing the accidents and failures
described in this manual to the contents of the operation manual of the device.
4. Product disposal
When disposing of this product, drain the lubricant completely and handle it according to the ordinances
of the local government and entrust the disposal to an industrial waste disposal specialist.
5. Other important notes
It is strictly prohibited to reverse-engineer the internal parts of this product.

About This Manual
iii
1. Users of this manual
If this product is operated by non-native speakers of English, the customer is responsible for conducting
safety training and giving operation instructions to those workers.
2. Copyrights
The copy right for this manual belongs to Nabtesco Corporation. Unauthorized reprinting, reproduction,
copying, or translation of this manual in whole or in part is strictly prohibited.
About This Manual

Warranty
iv
1. In the case where Nabtesco confirms that a defect of the Product was caused due to
Nabtesco’s design or manufacture within the Warranty Period of the Product, Nabtesco
shall repair or replace such defective Product at its cost. The Warranty Period shall be from
the delivery of the Product by Nabtesco or its distributor to you (“Customer”) until the end
of one (1) year thereafter, or the end of two thousand (2,000) hours from the initial
operation of Customer's equipment incorporating the Product at end user's production line,
whichever comes earlier.
2. Unless otherwise expressly agreed between the parties in writing, the warranty obligations
for the Product shall be limited to the repair or replacement set forth herein. OTHER THAN
A PROVIDED HEREIN, THERE ARE NO WARRANTIES ON THE PRODUCT,
EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE.
3. The warranty obligation under Section 1 above shall not apply if:
a) the defect was caused due to the use of the Product deviated from the Specifications or the
working conditions provided by Nabtesco;
b) the defect was caused due to exposure to foreign substances or contamination (dirt, sand, etc.)
c) lubricant or spare part other than the ones recommended by Nabtesco was used in the Product;
d) the Product was used in an unusual environment (such as high temperature, high humidity, a lot
of dust, corrosive/volatile/inflammable gas, pressurized/depressurized air, under water/liquid or
others except for those expressly stated in the Specifications);
e) the Product was disassembled, re-assembled, repaired or modified by anyone other than
Nabtesco;
f ) the defect was caused due to the equipment into which the Product was installed;
g) the defect was caused due to an accident such as fire, earthquake, lightning, flood or others; or
h) the defect was due to any cause other than the design or manufacturing of the Product.
4. The warranty period for the repaired/replaced Product/part under Section 1 above shall be
the rest of the initial Warranty Period of the defective Product subjected to such
repair/replace.
Warranty

Glossary
v
Rated service life
The lifetime resulting from the operation with the rated torque and the rated output speed is referred to
as the “rated service life”.
Allowable acceleration/deceleration torque
When the machine starts or stops, the load torque to be applied to the reduction gear is larger than the
constant-speed load torque due to the effect of the inertia torque of the rotating part. In such a situation,
the allowable torque during acceleration/deceleration is referred to as “allowable
acceleration/deceleration torque”.
Note: Be careful that the load torque, which is applied at startup and stop, does not exceed the
allowable acceleration/deceleration torque.
Momentary maximum allowable torque
A large torque may be applied to the reduction gear due to execution of emergency stop or by an
external shock. In such a situation, the allowable value of the momentary applied torque is referred to
as “momentary maximum allowable torque”.
Note: Be careful that the momentary excessive torque does not exceed the momentary maximum
allowable torque.
Allowable output speed
The allowable value for the reduction gear’s output speed during operation without a load is referred to
as the “allowable output speed”.
Note: Depending on the conditions of use (duty ratio, load, ambient temperature), the reduction gear
surface temperature may exceed 60°C even when the speed is under the allowable output speed.
In such a case, either take cooling measures or use the reduction gear at a speed that keeps the
surface temperature at 60°C or lower.
Allowable Moment and Maximum Thrust Load
The external load moment or thrust load may be applied to the reduction gear during normal operation.
The allowable values at this time are referred to as “allowable moment” and “maximum thrust load”
respectively.
Note 1: The above specification values are noted in the catalog or separately provided specification sheet.
Note 2: The “reduction gear” described in this manual indicates the E series, C series, or Original series
of the product.
Load torque
External shock torque
Max. torque for startup
Constant torque
Time
Max. torque
for stop Shock torque at
emergency stop
Glossary

Chapter 1 About safety
1
Chapter 1 About safety
The safety precautions noted in this chapter should be used as guidelines to prevent injury of workers
who perform transportation, installation, operation, and maintenance of this product, as well as damage
to the product.
1.1. About warnings
This manual alerts workers to hazardous situations and precautions related to this product in the
following manner:
1. Safety regulations are described in Chapter 1 “About safety” in this manual
2. Warning statements are noted in this manual
1.2. Type and indication of warning
Warnings for potential hazards during operation are given according to the following four categories in
this manual. If you fail to observe these warning statements, it could result in lethal injury or serious
damage and malfunction of the product.
Indicates a hazardous situation that, if not avoided, is highly likely to result in death or
serious injury.
Indicates a potentially hazardous situation that, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation that, if not avoided, could result in minor or
moderate injury.
Indicates a potentially hazardous situation that, if not avoided, could result in physical
damage.
Provides important information for correct use of this product, as well as supplemental
explanation for the main body of the text or other information that helps to prevent
erroneous operation.
Note
Important

Chapter 1 About safety
2
1.3. General precautions
This section describes general precautions for safe use of this product. For precautions concerning
transportation, installation, operation, maintenance, and inspection, be sure to confirm the contents of the
relevant chapter.
Do not modify or disassemble the reduction gear in a manner not described in this manual. This
could cause injury or damage to the reduction gear.
Transportation, installation, operation, maintenance, and inspection of the reduction gear must be
performed by personnel who fully understand this manual. The person in charge of the operation
and manager of the reduction gear must not allow anyone without an understanding of the contents
of this manual to operate it. This could cause injury or damage to the reduction gear.
Do not put your fingers or any object into the opening of the reduction gear. If a belt or chain is used
for connection of the drive sections, do not put your fingers or any object into the clearance of the
protective cover, etc., as it could cause injury.
If any abnormalities or damage to the reduction gear are found, stop the operation immediately.
Incorrect motion could cause injury.
The reduction gear could become extremely hot during operation. After stopping the operation,
never touch the reduction gear until it is completely cooled. Touching the reduction gear could cause
burns.
Handle the lubricant according to the instructions given in this manual. Failure to do so could impair
your health.
This reduction gear is not filled with lubricant. Fill the reduction gear with an appropriate amount of
Nabtesco-recommended lubricant before use. Failure to do so could cause damage to the reduction
gear.
Return the tools and other necessary items to the specified location after use. If a tool, bolt, nut, or
other foreign object is trapped in the system, it could cause damage to the reduction gear.
Avoid excessive impact or vibration of the reduction gear Failure to do so could cause damage to
the reduction gear.
Note

Chapter 2 Product overview
3
Chapter 2 Product overview
This chapter provides an overview of this product.
2.1. Name of each section
This section provides an explanation of the name of each section.
If the shape of the actual section differs from the illustration below, refer to the separately provided
“Outer dimensions” drawings and specification sheet.
(1) E series
(2) C series
Fig. 2-1
Tapped hole for shaft
installation
Shaft
Case O-ring groove
on the case
Tapped hole for
hanging bolt
Case fixing hole
Spur gear
Standard input gear
(Optional)
Fig. 2-2
Shaft
Case
O-ring groove on the case
Tapped hole for hanging bolt
Case fixing hole
Spur gear
(Optional)
Tapped hole for center tube
installation
Hole for shaft installation
Center gear

Chapter 2 Product overview
4
(3) Original series
The shape of the reduction gear may differ from the illustration depending on the ordered
specifications.
2.2. Parts codes of catalog products
The parts codes are assigned as follows for the E series, C series and original series catalog products.
For detailed specifications of those products not included in the catalog, refer to the separately provided
“External dimensions” drawings and specification sheet. If anything is unclear, refer to our contact
information.
<Parts codes of catalog products for E series and original series>
Example) P35E001B00, P35E001D00, P35E001F00
Only for the E series and original series, when the third digit from the end of the parts code is “B”, “D”, or “F”, the
code indicates a catalog product.
Any other codes indicate products not included in the catalog.
For the parts code, check “Parts code” indicated on the shipping label of the product (Fig. 4-8).
<Parts codes of catalog products for C series>
P10L010-00, P10L014-00, P10L017-00, P10L018-00, P21L014-00, P21L015-00, P21L018-00, P21L019-00,
P31L012-00, P31L013-00, P31L014-00, P31L015-00, P41L013-00, P41L014-00, P41L017-00, P41L018-00,
P51L004-00, P51L005-00, P51L009-00, P51L010-00, P65L002-00, P65L013-00, P65L021-00, P65L023-00,
P76L004-00, and P76L014-00
Only for the C series, the above parts codes indicate the catalog products.
Any other codes indicate products not included in the catalog.
For the parts code, check “Parts code” indicated on the shipping label of the product (Fig. 4-8).
Note: The last two digits of the parts code, within the range from 00 to 99 (“00” in the above parts code), indicate the
revision code.
Fig. 2-3
Tapped hole for
shaft installation
Shaft
Case
O-ring groove
on the case
Tapped hole for
hanging bolt
Case fixing hole
Spur gear
Standard input gear
(Optional)
Removal
tap
Important

Chapter 3 Transportation and storage of product
5
Chapter 3 Transportation and storage of product
This chapter describes the transportation and storage of this product.
3.1. Transportation
Transport the product in an appropriate manner according to the weights indicated in the separately
provided “Outer dimensions” drawings and specifications.
If the reduction gear needs to be lifted after unpacking, also refer to “4.4 Lifting of this product”.
For the catalog products described in “2.2. Parts codes of catalog products”, refer to the weights of
the reduction gears listed below.
Do not stack the packing boxes containing this product too high.
Avoid excessive impact or vibration of the reduction gear.
Table 3-1
Model Weight (kg) Model Weight (kg) Model Weight (kg)
RV-6E 2.5 RV-10C 4.6 RV-15 3.6
RV-20E 4.7 RV-27C 8.5 RV-30 6.2
RV-40E 9.3 RV-50C 14.6 RV-60 9.7
RV-80E 13.1 RV-100C 19.5 RV-160 19.5
RV-110E 17.4 RV-200C 55.6 RV-320 34
RV-160E 26.4 RV-320C 79.5 RV-450 47
RV-320E 44.3 RV-500C 154 RV-550 72
RV-450E 66.4
If the packing boxes containing the reduction gear are stacked too high during transportation, they
may collapse and fall down, causing injury or damage to the reduction gear.
Applying excessive impact or vibration to the reduction gear could cause damage to the reduction
gear.
Each weight listed in the above table, as well as in the separately provided “Outer dimensions”
drawings and specification sheet, indicates the weight of the reduction gear only. It does not include
the weight of the packing box or optional parts, etc.
The actual weight of the reduction gear may slightly differ from that listed in the above table,
depending on the specifications.
Note
Important

Chapter 3 Transportation and storage of product
6
3.2. Storage
To avoid rust, corrosion, or deterioration of the sealing material, etc., and collapse of stored packing
boxes, store the product in the following location.
Location where the ambient temperature is between -10°C to 40°C.
Location where the humidity is less than 85% and no condensation occurs
Location that is not directly affected by wind and rain
Location that is free from combustible/volatile/corrosive gas or dust.
Stable location that is free from any danger of collapse
Location with little vibration
If the packing boxes containing the reduction gear are stacked too high during transportation, they
may collapse and fall down, causing injury or damage to the reduction gear.
Store the reduction gear under the same conditions as those before unpacking. If it is left upside
down, it could cause damage to the reduction gear.
Although the reduction gear is coated with rust prevention oil before shipping, it is not designed for
long-term storage. If it is stored for a long period, check the condition of the reduction gear
periodically and perform rust prevention treatment as necessary. If rust occurs, it could cause the
leakage of lubricant or premature damage to the reduction gear.
If the reduction gear is used or operated after it has not been used for a long period of time, confirm
that it is free from rust or corrosion and that the sealing material is free from deformation or cracks
beforehand. If the reduction gear is used without checking these points, it could cause the leakage
of lubricant or premature damage to the reduction gear.
Note

Chapter 4 Preparations for installation
7
Chapter 4 Preparations for installation
This chapter describes the preparation for installing this product.
Before designing the equipment, take care regarding the following precautions.
When the reduction gear is used for human transportation equipment, install an effective safety unit
as a fail-safe mechanism, in case of an unexpected failure in the reduction gear.
When the reduction gear is used for elevating equipment, install an effective safety unit for
preventing falls caused by idle running as a fail-safe mechanism, in case of an unexpected failure in
the reduction gear.
Install an oil receiver, etc., to prevent damage in case of lubricant leakage due to a failure or lifetime
expiration.
As this product may have residual rust prevention agent coated on it before shipping, wipe it off as
necessary.
When the reduction gear is used for human transportation equipment, install an effective safety unit
as a fail-safe mechanism, in case of an unexpected failure in the reduction gear. If you fail to install it,
it could cause injury in case the equipment goes out of control or falls off.
When the reduction gear is used for elevating equipment, install an effective safety unit for
preventing falls caused by idle running as a fail-safe mechanism, in case of an unexpected failure in
the reduction gear. If you fail to install it, it could cause injury in case the elevating unit falls off.
4.1. Installation environment
Use this product under the following environment:
Location where the ambient temperature is between -10°C to 40°C
Location where the humidity is less than 85% and no condensation occurs
Location where the altitude is less than 1,000 m
Well-ventilated location
Do not install the reduction gear at the following locations.
Location where a lot of dust is collected
Outdoors that can be directly affected by wind and rain
Location near the environment that contains combustible/explosive/corrosive gases and flammable
materials
Location where the magnetic fields or vibration occur
If the required installation environment cannot be established/met, contact our service
representative in advance.
When using this product under special conditions (clean room, equipment for food, medical
equipment, concentrated alkali, high-pressure steam, etc.), contact our service representative in
advance.
Important

Chapter 4 Preparations for installation
8
4.2. Preparation of required components
The following components and materials are required for installing this product. Check the
components/materials and prepare them at each customer’s site.
If the shape of the actual section differs from the illustration below, refer to the separately provided
“Outer dimensions” drawings and specification sheet.
Prepare the input gear, motor mounting flange, case installation component, and shaft installation
component that have been designed and manufactured based on the catalog and separately provided
“Outer dimensions” drawings and specification sheet.
Fig. 4-1 (E series)
Fig. 4-3 (Original series)
Fig. 4-2 (C series)

Chapter 4 Preparations for installation
9
The actual components may differ from the required components shown in the above illustration,
depending on the customer’s equipment.
The above is an illustration of the bolt-clamping output shaft type from the catalog. Note that a pin is
required for the pin/bolt clamping output shaft type.
Seal the shaft mounting surface of the reduction gear and shaft installation component using liquid
sealants.
If liquid sealants cannot be used, use an O-ring (I) and high-torque seal washer.
4.2.1. Input gear
Prepare the input gear for motor rotation into the reduction gear. For the design of the input gear,
refer to “Appendix: Design Scheme of Input Gear”.
The prepared gear teeth must meet the specifications and materials described in “Appendix: Design
Scheme of Input Gear”. An operation error due to damage or wear of the gear teeth could cause
injury.
If the input gear has an oil sealing surface, take extra care so that no scratch will be made on the oil
sealing surface when handling the input gear. Any scratches could cause leakage of the lubricant.
Take extra care so that no scratch will be made on the gear tooth section when handling the input
gear. Any scratches could cause abnormal noise.
The customer is requested to prepare the oil seals used for sealing the circumference of the input
gear.
The standard input gear, which is an optional component, is not provided with installation
components such as bolts and keys. Prepare them as necessary at each customer’s site.
4.2.2. Flange and its installation components
Motor mounting flange
Prepare the motor mounting flange for fixing the motor on the reduction gear input side.
In order to avoid contact with reduction gear components, refer to the sizes indicated in the “Outer
dimensions” drawings when designing the motor mounting flange.
Confirm that a tapped hole for injecting/draining grease is installed in the motor mounting flange. It
will be necessary for filling or replacing the lubricant after installing the reduction gear.
Important
Note
Important

Chapter 4 Preparations for installation
10
Design the motor mounting flange to the following accuracy. If the installation accuracy is poor, it
will result in vibration, noise, and increase in backlash. If a model other than those listed below is
used, contact our service representative.
<Installation accuracy> (E series)
Table 4-1
<Installation accuracy> (C series)
Table 4-2
<Installation accuracy> (Original series)
The reduction gear of the original series will be embedded in the equipment as a component.
When designing a system, be sure that the external thrust load and radial load are not applied to the
reduction gear.
Table 4-3
Fig. 4-4
(110E or above)
Model
Concentricity
tolerance
a (mm)
Model
Concentricity
tolerance
a (mm)
Parallelism
tolerance
b (mm)
Fig. 4-5
Model
Circumference
deviation tolerance
a (mm)
Runout
tolerance
b (mm)
Runout
tolerance
c (mm)
Concentricity
tolerance
d (mm)
Dimension accuracy on the
mounting side

Chapter 4 Preparations for installation
11
Fig. 4-6
Confirm that the design of the prepared motor mounting flange conforms to the size and quantity of
the case mounting bolts indicated in the separately provided “Outer dimensions” drawings and
specification sheet. For the catalog products described in “2.2. Parts codes of catalog products”,
refer to the size and quantity of the bolts listed in Table 4-4 in “4.2.3 Reduction gear mounting bolts”.
If no tapped hole for injecting/draining grease is installed in the motor mounting flange, the lubricant
cannot be filled/replaced after installing the reduction gear.
Case installation component
Prepare the case installation component for the reduction gear. The component can also be embedded in
the motor mounting flange.
Confirm that the design of the prepared case installation component conforms to the size and
quantity of the case mounting bolts indicated in the separately provided “Outer dimensions”
drawings and specification sheet. For the catalog products described in “2.2. Parts codes of catalog
products”, refer to the size and quantity of the bolts listed in Table 4-4 in “4.2.3 Reduction gear
mounting bolts”.
After attaching the reduction gear, bring
the dial gauge in contact with the location
shown in the illustration and rotate the
output shaft of the reduction gear by a
turn. At this point, be sure that the
deviation in the gauge reading is 0.02
mm or less.
Output shaft mating face
Case mating face
(Inside mating part)
(Outside mating part)
Use either of the inside or outside for mating part
B of the output shaft.
For the RV-320, RV-450, and RV-550, only the
inside mating part can be used.

Chapter 4 Preparations for installation
12
Shaft installation component
Prepare the installation component for the output shaft of the reduction gear.
Confirm that the component is structured so that the lubricant can be sealed with an O-ring or liquid
sealant.
Confirm that a tapped hole for injecting/draining grease is installed in the shaft installation
component. It will be necessary for filling or replacing the lubricant after installing the reduction
gear.
Confirm that the design of the prepared shaft installation component conforms to the size and
quantity of the shaft mounting bolts indicated in the separately provided “Outer dimensions”
drawings and specification sheet. For the catalog products described in “2.2. Parts codes of catalog
products”, refer to the size and quantity of the bolts listed in Table 4-5 in “4.2.3 Reduction gear
mounting bolts”.
If no tapped hole for injecting/draining grease is installed in the shaft installation component, the
lubricant cannot be filled/replaced after installing the reduction gear.