Tsubaki EW Series User manual

1
EW00E.00TS-4
Printed May 10, 2021
TSUBAKI Worm Gear Reducer
EW/EWJ/EWM/EWJM series
SW/SWJ/SWM/SWJM series
Instruction Manual
TSUBAKIMOTO CHAIN CO.
Thank you for purchasing the EW/EWJ/EWM/EWJM or SW/SWJ/SWM/SWJM series worm gear
reducer.
To ensure full use of the features of this product, be sure to carefully read this instruction manual
and refer to it for installation and inspection. This product should be handled by trained individuals.
For special specifications, refer to this instruction manual and the external drawings (specification
and delivery drawings). Contact your distributor or Tsubakimoto Chain Co. if you have any
questions regarding this instruction manual.
Provide the instruction manual at a location that is accessible to the operator.
Keep the instruction manual in a safe place for easy reference before using the product.

2
Contents
Safety Precautions ··························································································· 3
1.After Purchase······························································································ 5
1-1.Checking the contents············································································· 5
1-2.Information to provide when contacting customer service ······························· 5
1-3.Model number designation······································································· 5
2.Transport ····································································································· 11
3.Installation···································································································· 11
3-1.Solid output shaft type ············································································· 11
3-2.Hollow output shaft type··········································································· 13
4.Connection··································································································· 15
4-1.Verifying the direction of rotation ································································ 15
4-2.Connection···························································································· 15
5.Lubrication ··································································································· 17
5-1.Recommended lubrication oil···································································· 17
5-2.Approximate oil volume ··········································································· 17
5-3.Replacing the lubrication oil ······································································ 17
5-4.Supplying grease (Semi-standard package) ················································ 18
6.Operation····································································································· 19
6-1.Double checking before operation······························································ 19
6-2.Trial run ································································································ 19
6-3.Load ···································································································· 19
6-4.Verification after operation starts ································································ 19
7.Maintenance································································································· 20
7-1.Maintenance precautions········································································· 20
7-2.Daily inspection······················································································ 20
7-3.Inspection and replacement of the oil seal ··················································· 20
8.Handling the standard motor and brake specifications··········································· 21
8-1.Standard motor specifications········································································ 21
8-2.Specifications and construction of SLB brake (for 0.1 to 2.2 kW motor with brake)
and gap adjustment····················································································· 33
8-3.Specifications and construction of VNB brake (for 3.7 to 5.5 kW motor with brake)
and gap adjustment····················································································· 35
9.Handling a Semi-standard Package ·································································· 36
9-1.Handling POWER-LOCK specifications······················································ 36
9-2.Handling the taper bush specifications························································ 38
10.Disassembly and Assembly ··········································································· 39
11.Troubleshooting··························································································· 40
12.Internal Construction and Parts List ································································· 40
12-1.Internal construction ·············································································· 40
12-2.Parts list······························································································ 45
13.Storage······································································································ 47
14.Others ······································································································· 48
15.Warranty ···································································································· 48
16.CE Certified Motor························································································ 49
17.UL Listed Motor ··························································································· 50

Safety Precautions
For the safe use of this product, be sure to follow all items listed below.
The reducer should be handled by trained individuals. Be sure to carefully read and familiarize yourself with the contents of the
instruction manual before using the product.
Provide the instruction manual at a location that is accessible to the operator during actual operation.
Keep the instruction manual in a safe place for easy reference before using the product.
The level of damage and injury that can occur if the correct operations are not followed is generally divided into "warnings" and
"cautions" in the instruction manual. The definition and use of each are described below.
Warning
Incorrect operation can result in death or serious injury.
Caution Incorrect operation can result in minor or moderate injury or damage.
Items denoted with "caution" can also lead to a serious result depending on the situation.
Be sure to read these, as they contain important information.
(General)
 Have a skilled individual with expert knowledge perform transport, installation, wiring, operation, maintenance, and inspection.
Otherwise, explosion, ignition, fire, electric shock, injury, or equipment damage can occur.
 When using this product in a crew transport device, be sure to provide protective safety equipment on the device. Runaway
operation and falls can result in personal injury or equipment damage.
 When using this product in an elevating device, be sure to provide safety equipment on the device to prevent falls. Falling of the
elevating device can result in personal injury or equipment damage.
 Do not work on this product using live-wire operation. Be sure to turn off the power before performing any work. Otherwise, electric
shock can occur.
 Do not apply water or oil to the brake. Reduced brake torque can result in falls or runaway accidents.
 Overhauling of the reducer requires skill, so be sure to send the product to the specialty plant of Tsubakimoto Chain Co.
(Transport)
 Never stand underneath the product while it is being lifted for transport. Falls can result in personal injury.
(Wiring)
 Connect the power supply cable according to the wiring diagram in the terminal box and the instruction manual. Otherwise, electric
shock or fire can occur. (If the terminal box does not have a wiring diagram, insulate the connectors properly.)
 Do not forcibly bend, pull, or pinch the power supply cable or motor lead wires. Otherwise, electric shock can occur.
 Ground the earth terminal properly. Otherwise, electric shock can occur.
 Be sure to ground the product and install a special ground fault interrupter for each product. Otherwise, electric shock can occur.
 Install a motor protection device for each product. Problems can result in a risk of fire.
 Be sure to use the AC source listed on the motor nameplate. Otherwise, motor burnout or fire can occur.
(Operation)
 Do not operate the product with the terminal box cover removed. After performing work, install the terminal box cover to its original
position.
 Never approach or touch the shaft or other rotating parts during operation. Catching and injury can occur.
 Be sure to turn off the switch if a power failure occurs. Unexpected resumption of power can result in injury or equipment damage.
(Daily inspection and maintenance)
 Never touch the shaft or other rotating parts when maintaining or inspecting the product during operation. Catching and personal
injury can occur.
 Do not remove the pressure vent during operation. High-temperature lubrication oil can splatter, creating burns.
 When inspecting the gear tooth surfaces while stopped, properly prevent the drive and driven equipment from rotating. Catching on
the gear meshing parts and personal injury can occur.
 Loading the motor and gears above their rated capacity can affect their life and result in damage.
(Inspection and maintenance of brake parts)
 Do not operate the product with the brake released using the manual release bolt or manual release lever. Falls or runaway
accidents can occur.
 Before operating the product, turn the power on and off and check the brake operation. Falls or runaway accidents can occur.
 After gap inspection and adjustment, do not operate the motor with the fan cover removed. Catching and injury can occur.
 When using this product for elevating, do not release the brake while lifting a load. Falling accidents can occur.
Warning

(General)
 Do not use with specifications other than on the reducer nameplate and the manufacturing specifications. Injury or equipment
damage can occur.
 Do not insert fingers or objects into the openings on the reducer. Electric shock, injury, fire, and equipment damage can occur.
 Do not use a damaged reducer. Injury or fire can occur.
 Do not remove the nameplate.
 Modifications made to the product by the customer are outside the range of the warranty, and Tsubakimoto Chain Co. is not
responsible.
(Upon receipt of your reducer)
 Open the packaging right side up. Otherwise, injury can occur.
 Check the contents for all ordered parts. Installing an incorrect product can result in injury or equipment damage.
(Transport)
 Be careful when transporting so as not to drop or overturn the product. Be sure to use lifting hardware when available. Avoid lifting
the entire machine by the lifting hardware after installing the machine. Breaking of the lifting hardware, falls, or overturning can result
in injury or equipment damage. Before lifting the reducer, check the load on the nameplate, packaging, external drawing
(specification and delivery drawings), or catalog. Do not lift a reducer that exceeds the rated load of the lifting equipment. Breaking
of the bolts, falls, or overturning can result in injury or equipment damage.
(Mounting)
 Do not place obstacles that can block ventilation around the reducer. This can prevent cooling and cause overheating, resulting in
injury or fire.
 Never place objects on or hang objects from the reducer. Otherwise, injury can occur.
 Do not touch the key grooves, such as the shaft end or inside diameter of the reducer, with a bare hand. Injury can occur.
 When using the reducer with food processing machines, especially equipment that is affected by oil vapor, install an oil pan or other
protective device in case of oil leaks in the event of a malfunction or the end of operating life. Oil leaks can result in product faults.
(Connection)
 When connecting the reducer to the motor and load, be careful of the alignment, belt tension, and parallelism of the pulley. When
direct coupling, be careful of the direct coupling accuracy. When setting a belt, adjust the belt tension correctly. Before operation,
securely tighten the pulley and coupling tightening bolts. Otherwise, launching of parts can cause injury or equipment damage.
 Provide a cover so that rotating parts cannot be touched. Otherwise, injury can occur.
 When rotating the reducer separately, remove the key temporarily attached to the output shaft. Otherwise, injury can occur.
 Check the direction of rotation before connecting to another machine. A difference in direction can result in injury or equipment
damage.
(Operation)
For a specification with a fan cover, do not insert your hand in the fan cover. Otherwise, there is a risk of being caught in those
parts resulting in injury.
The reducer becomes very hot during operation. Be careful not to touch it with your hands or body. Burns can occur.
 If a problem occurs, immediately stop operation. Otherwise, electric shock, injury, or fire can occur.
 Do not use at above the rated load. Injury or equipment damage can occur.
 Do not loosen the oil plug during operation. Lubrication oil can splatter, creating burns.
 When reversing operation, be sure to bring the reducer to a full stop before starting reverse operation. Plucking can cause the
forward-reverse operation to damage the reducer or equipment.
(Disassembly/assembly)
 Request repair, disassembly, and assembly to qualified personnel only. Otherwise, electric shock, injury, or fire can occur.
(Daily inspection and maintenance)
 Follow the instruction manual for replacing the lubrication oil and grease. Be sure to use the oil type recommended by the
manufacturer. Otherwise, equipment damage can occur.
 Do not touch the surface of the reducer with a bare hand, as it can be very hot. Burns can occur.
 Do not replace the lubrication oil during operation or immediately after stopping operation. Burns can occur.
 If a problem occurs, diagnose the problem according to the instruction manual. Never operate the reducer until the source of the
problem is determined and corrective measures have been taken.
(Disposal)
 Dispose of the reducer and lubrication oil in accordance with regulations on disposal of general industrial waste.
Caution

[ 1 ] After Purchase
1-1. Checking the contents
Check the following items upon receipt of your reducer.
Contact your distributor or Tsubakimoto Chain Co. if any defects are found.
Caution
 Check the contents for all ordered parts. Installing an incorrect product can result in injury or equipment damage.
 Open the packaging right side up. Otherwise, injury can occur.
(1) Verify the specifications on the nameplate correspond to your order. Pay special attention to the shaft arrangement and rotational
direction. Check this against the position of the input and output shafts, oil gauge and plugs.
(2) Make sure all accessories, such as pressure vents, are included.
(3) Visually inspect for damage sustained during transport.
(4) Make sure there are no loose screws or bolts.
(5) check the nameplate of motor.
Nameplate
Type (model number) Ratio Manufacturing number Drawing number
1-2. Information to provide when contacting your distributor or Tsubakimoto Chain Co.
Please provide the following information if the details on the nameplate do not match the product or when ordering parts or products:
(1) Model number (Type)
(2) Ratio
(3) Manufacturing number
(4) Drawing number
1-3. Model number designation
The meaning of the model number is shown the next page. Make sure the model number of the unit delivered matches your order.

1-3-1. Model numbers for the EW/EWJ/EWM/EWJM and SW/SWJ/SWM/SWJM series
Single Reduction Gear Reducers
* For option symbols or special model numbers, see the external drawings (specification and
delivery drawings) and this instruction manual.
Series Size Mounting Position ReductionRatio Shaft Arrangement MotorCapacity MotorSpecifications
Without motor
EWJ 25 E 10 L
Option*
SWJ 50 E 20 DF
EW 100 B 30 R
SW 100 B 40 LF
With motor
EWJM 42 E 30 LD 040 S
SWJMR
63 E 40 DF 075
EWMR 100 T 25 H 370
SWMR 100 V 60 SRF 220 B
Series
EWJ
25/35/42
50/63/70
SWJ
25/35/42
50/63/70
EW/SW
80/100
125/150
175
/
200
Series
EWJ(R)
42/50
63/70
SWJ(R)
35/42
50/63/70
EWM(R)
SWM(R)
80/100
125
/
150
Mounting Position
EWJ25 to 42
EWJM42
SWJ25 to 70
SWJM35 to 70
E: E type
EWJ50 to 70
EWJM50 to 70
E: E type
V: V type
EW/EWM
SW/SWM
80 to 200
T: T type
B: B type
V: V type
ReductionRatio
10:1/10
15:1/15
20:1/20
25:1/25
30:1/30
40:1/40
50:1/50
60:1/60
Shaft Arrangement
See page 8
Motor Capacity
(3-phase)
010: 0.1 kW
020: 0.2 kW
040: 0.4 kW
075: 0.75 kW
150: 1.5 kW
220: 2.2 kW
370: 3.7 kW
550: 5.5 kW
MotorSpecifications
0.1 to 0.4kW
S: Ship with
standard motor
mounted.
SB: Ship with
standard brake
motor mounted.
0.75 to 5.5kW
No code:IE3
motor without
brake mounted
B: IE3 motor with
brake mounted
Common:
SX: Ship with
customer-supplied
motor mounted.
Y: Customer to
install motor

Double Reduction Gear Reducers
* For option symbols or special model numbers, see the external drawings (specification and delivery
drawings) and this instruction manual.
Series Size MountingPosition Reduction Ratio Shaft Arrangement MotorCapacity MotorSpecifications
Without motor
EWJ 50 T 100 R-L
Option*
EW 100 B 300 L-R
SW 100 B 1200 R-LF
With motor
EWJM 70 B 500 R-L 020 S
EWMR 100 V 300 R-LUD 075
SWMR 150 B 300 L-RF 370 B
Series
EWJ
EWJM(R)
50/63/70
EW/EWM(R)
SW/SWM(R)
80/100
125/150
175/200
MountingPosition
EWJ50/63
EWJM50/63
T: T type
V: V type
EWJ70
EWJM70
EW/EWM
80 to 200
SW/SWM
80 to 200
B: B type
V: V type
Reduction Ratio
100:1/100
150:1/150
200:1/200
250:1/250
300:1/300
400:1/400
500:1/500
600:1/600
800:1/800
1000:1/1000
1200:1/1200
1500:1/1500
1800:1/1800
2400:1/2400
3000:1/3000
3600:1/3600
Shaft Arrangement
See page 9
MotorCapacity
(3-phase)
010: 0.1 kW
020: 0.2 kW
040: 0.4 kW
075: 0.75 kW
150: 1.5 kW
220: 2.2 kW
370: 3.7 kW
550: 5.5 kW
MotorSpecifications
0.1 to 0.4kW
S: Ship with
standard motor
mounted.
SB: Ship with
standard brake
motor mounted.
0.75 to 5.5kW
No code:IE3
motor without
brake mounted
B: IE3 motor with
brake mounted
Common:
SX: Ship with
customer-supplied
motor mounted.
Y: Customer to
install motor

1-3-2. Shaft arrangement
①EWJ/EW series Single reduction type (Arrows in figures indicate direction of rotation.) *E type applies to the EWJ series.
Note 1) E type applies to the EWJ series, and the hollow output shaft type (-H) applies to theEWseries.
Note 2) If the reducer has a double output shaft, the keyway may not be in the same phase. Contact us if the phases must be matched.
②EWJM/EWM Single reduction type (Arrows in figures indicate direction of rotation.) * E type applies to the EWJM series.
Note 1) E type applies to the EWJM series, and the hollow output shaft type (-H) applies to the EWM series.
Note 2) If the reducer has a double output shaft, the keyway may not bein the same phase. Contact us if the phases must be matched.
E type
T type
V type E typeT type
B type
V type

③SWJ/SW/SWJM/SWMseries (Arrows in figures indicatedirectionofrotation.) *E type appliestotheSWJM series.
Note 1) The solid output shaft type (-SLF, -SRF) applies to the SW/SWM series. Shaft arrangements for models SWJ25 to 63 and SWJM35 to 63 are E-DF.
Note 2) If the reducer has a double output shaft, the keyway may not bein the same phase. Contact us if the phases must be matched.
④EWJ/EW series Double reduction type (Arrows in figures indicate direction of rotation.)
Note 1) Double reduction ratio models EWJ50 and EWJ63 come with the T type shaft arrangement instead of the B type. (Example: EWJ50T100L-R)
Note 2) Hollow output shaft type (-H) applies to the EW series.
Note 3) If the reducer has a double output shaft, the keyway may not be in the same phase. Contact us if the phases must be matched.
E typeB typeT typeV type
B typeV type

⑤EWJM/EWM series Double reduction type (Arrows in figures indicate direction of rotation.)
Note 1) Double reduction ratio models EWJ50 and EWJ63 come with the T type shaft arrangement instead of the B type.
(Example: EWJM50T100L-R020S)
Note 2) Hollow output shaft type (-H) applies to the EWM series.
Note 3) If the reducer has a double output shaft, the keyway may not be in the same phase. Contact us if the phases must be matched.
⑥SW series Double reduction type (Arrows in figures indicate direction of rotation.)
Note 1) If the reducerhas a double output shaft, the keyway may not be in the same phase. Contact us if the phases must be matched.
B typeV type
Double Reduction RatioSingle Reduction Gear Reducers
B typeV type

[ 2 ] Transport
Warning
 Never stand underneath the product while it is being lifted for transport. Falls can result in personal injury.
Caution
(Transport)
 Be careful when transporting so as not to drop or overturn the product. Be sure to use lifting hardware when available. Avoid lifting the entire
machine by the lifting hardware after installing the machine. Breaking of the lifting hardware, falls, or overturning can result in injury or
equipment damage. Before lifting the reducer, check the load on the nameplate, packaging, external drawing (specification and delivery
drawings), or catalog. Do not lift a reducer that exceeds the rated load of the lifting equipment. Breaking of the bolts, falls, or overturning can
result in injury or equipment damage.
Be sure to use the eye-nut on the top surface of the housing (fastened with a hex bolt) when transporting the reducer. Never hook
wires or slings to the input/output shafts. Doing so may cause unexpected load to the shaft/bearing and shorten the life of the reducer
or cause a malfunction. If the reducer comes with a motor, use the lifting hook on the motor as well to keep it balanced while lifting.
Note 1) EWJ25 to 42, and EWJM42: No through holes on the top surface of the housing. Move by hand.
Note 2) SWJ25 to 63, SWJM35 to 63: No lifting bolts provided. Move by hand.
[ 3 ] Installation
Caution
 Do not place obstacles that can block ventilation around the reducer. This can prevent cooling and cause overheating, resulting in injury or fire.
 Never place objects on or hang objects from the reducer. Otherwise, injury can occur.
 Do not touch the key grooves, such as the shaft end or inside diameter of the reducer, with a bare hand. Injury can occur.
 When using the reducer with food processing machines, especially equipment that is affected by oil vapor, install an oil pan or other protective
device in case of oil leaks in the event of a malfunction or the end of operating life. Oil leaks can result in product faults.
The area of installation should have an ambient temperature of 0 to 40°C, be well-ventilated, low in humidity, and have little or no dust.
Avoid use in areas with corrosive, explosive, or flammable liquids and gases.
If the reducer is to be used outdoors, furnish a cover or similar protection to avoid direct exposure to rain.
(1) When installing or removing the reducer from the driven shaft, make sure to shut off the power source before working.
(2) Always use the lifting bolt on the top surface of the reducer housing when installing or removing it from the driven shaft. Never
hook wires or slings to the input/output shafts.
(3) Make sure the reducer is balanced and stable when installing or removing it from the driven shaft. Working with the reducer in
an unbalanced position is extremely dangerous as it may turn over.Always maintain the reducer in a stable position.
(4) Models SWJ25 to 63 and SWJM35 to 63 do not have lifting bolts. Hold the reducer with both hands to keep it steady and
parallel to the driven shaft while inserting or removing it from the driven shaft.
3-1. Solid output shaft type
Reducers with a solid output shaft are either foot-mounted or flange-mounted (SW/SWM80 and later).
3-1-1. Foot mount (EW/EWM/EWJ/EWJM)
Confirm whether the installation is standard.
If the installation is non-standard, refer to the outline drawing or contact us as the volume of lubrication oil and the method of
lubrication differs from the standard design.
Install on a smooth flat installation surface that can easily withstand the weight of the equipment. The installation angle should
be within ±1°.
Use bolts compliant to JIS strength class 10.9T for installation.
Recommended bolts and length for mounting
Reducer size EWJ25 EWJ35 EWJ42 EWJ50 EWJ63 EWJ70 EW80 EW100 EW125 EW150 EW175 EW200
Recommended
bolts
M6x15 M8x15 M10x20 M8x25 M10x30 M12x35 M12x40 M14x45 M16x55 M20x60 M20x70 M24x80

Single reduction type: 1/10 to 1/60 Double reduction type: 1/100 to 1/3600
Standard/mounting position
T/B type
V type
B type
V typ
e
Double reduction ratio models for sizes 50 and 63 come standard with the T type instead of the B type.
Avoid installing in such a way that can cause the housing to become deformed.
3-1-2. Flange mount (solid output shaft type EWJ25 to 42/EWJM42/SW80 to 200/SWM80 to 200)
Mount the reducer using the flange side of the housing. Observe these points.
Solid output shaft SW80 to 200/SWM80 to 200
(1) Use the taps on the flange side of the reducer housing and use the spigot facing on the housing for positioning.
(2) Install the reducer by adjusting the radio runout, and the connection and angularity of the input/output shafts.
(3) Use bolts compliant to JIS strength class 10.9T for installation. Refer to the following table for recommended bolts.
(Bolt sizes in table: depths are tapping depths.)
Note) If the input/output connections are done without utilizing the spigot facing, tightening the bolts on the flange surface may
cause an unexpected load on the shafts/bearings which may shorten the life of the reducer.
Recommended bolt sizes for flange surface
Reducer size
SWJ50
SWJ
63
SWJ70
SW80
SW100
SW125
SW150
SW175
SW200
Bolt size
M8 16 deep
M10 18 deep
M8 15 deep
M10 20 deep
M10
20 deep
M12
25 deep
M12 25 deep
M14 30 deep
M16 30 deep
Mounti
ng PCD
120
145
157
180
205
255
3
00
350
380
Number used 4 evenly
spaced
4 evenly
spaced
6 evenly
spaced
6 evenly
spaced
6 evenly
spaced
6 evenly
spaced
8 evenly
spaced
8 evenly
spaced
8 evenly
spaced
Bolt strength class
10.9 or
higher
10.9 or
higher
10.9 or
higher
10.9 or
higher
10.9 or
hi
gher
10.9 or
higher
10.9 or
higher
10.9 or
higher
10.9 or
higher
Tightening torque
N·m
{
kgf·m
}
25 to 35
{
2.5 to 3.5
}
48 to 68
{
4.9 to 6.9
}
25 to 35
{
2.5 to 3
.5
}
48 to 68
{
4.9 to 6.9
}
48 to 68
{
4.9 to 6.9
}
84 to 118
{
8.6
to 12
}
84 to 118
{
8.6 to 12
}
137 to 186
{
14 to 19
}
206 to 294
{
21 to 30
}
EWJ25 to 42, EWJM42
When mounting the reducer to the floor or wall, take note of the following:
(1) Use the mounting holes provided on the flange surface to mount the reducer. The surface of the housing protrudes beyond the
mounting surface of the reducer. Leave at least the amount of clearance (φD, t) shown in the drawing between the reducer and
the mounting surface.
(2) Install the reducer by adjusting the radio runout, and the connection and angularity of the input/output shafts.
(3) Refer to the following table for recommended bolts and pitches for the flange surface of the reducer.
Note) If the input/output connections are done before tightening the bolts on the flange surface, an unexpected load may occur on
the shafts/bearings and shorten the life of the reducer.
Clearance required between installation surfaces
Model No. φD t
EWJ25
46
3
EWJ35
48
1.5
EWJ42
63
3
Mounting bolt size, quantity, pitch
Model No.
Mounting bolt
size
Pitch A
Pitch B
EWJ25
4
-
M6
x
60
57
76
EWJ35
4
-
M8 x 80
71
96
EWJ42
4
-
M10 x 90
88
111
Recommended tightening torque
Model No. Strength class Tightening torque (N･m)
Tightening torque (kgf·m･
m)
EWJ25
4.8 or higher
4.9 to 5.9
0.5 to 0.6
EWJ35
4.8 or h
igher
12 to 14
1.2 to 1.4
EWJ42
4.
8 or higher
24 to 27
2.4 to 2.7
Input
shaft
Input
shaft
Input
shaft
Input
shaft
R-L (R) L-(L) R R-LU (D) L-RU (D)
LU (D) RU (D)
B-L (R) T-(L) R
(E-L (R))
Pitch
A
Mounting holes on flange surface
Pitch B

3-2. Hollow output shaft type
There are three ways to prevent the reducer from rotating: torque arm mount, flange mount, and foot mount (EW-H only).
(1) Before inserting the driven shaft into the hollow output shaft, make sure the outside of the driven shaft and the inside of the hollow shaft
are free of scratches and dust.
(2) To make insertion easier, apply grease or molybdenum disulfide to the driven shaft.
(3) If the shafts fit very tightly, help the hollow shaft slide smoothly by tapping its opposite end with a plastic hammer. When you do this, be
careful not to damage the oil seal.
(4) The hollow shaft keyway is finished to New JIS standards for normal grade keyways. As for key length, refer to the following table,
Recommended driven shaft lengths.
Recommended driven shaft lengths
Reducer series
SWJ
EW/SW
Reducer size
25
35
42
50
63
70
80
100
125
150
175
200
Output sha
ft
length: A
60
70
80
108
128
130
148
174
200
250
270
290
Recommended length
of driven shaft: L
58 68 78 89 109 106 122 146 170 220 238 258
3-2-1. Installation/removal of torque arm
1. Installation procedures
Note) Avoid using a line shaft to connect reducers with a double input shaft.
(1) Fix the torque arm to the reducer with bolts.
Note) If the torque arm is purchased from Tsubakimoto Chain Co., use the attached bolts. If you make the torque arm, use a bolt strength class
of 10.9 or equivalent.
(2) Insert the reducer onto the driven shaft.
(3) Fix the reducer to the driven shaft in the axial direction.
SWJ25 to 42: Tsubakimoto Chain Co. recommends fixing the end plate on the end of the output shaft. (Figure 1)
SWJ50 to 70, SW80 to 200, EW80-H to 200-H (hollow output shaft): Tsubakimoto Chain Co. recommends fixing the stop
ring and end plate by using the stop ring groove on the hollow output shaft (Figure 2). (See the "Detailed dimensions of
hollow output shaft" Technical Data in the catalog.)
(4) After finalizing the installation position of the reducer, fix the torque arm to prevent the reducer and driven shaft from rotating.
Provide sufficient room so that the torque arm is free to move in the axial direction.
Note) Do not fix the tip of the torque arm before fixing it to the reducer. Doing so may damage the reducer. Follow the work procedure as outlined
here. (EW80-H to 200-H are foot mount types. After fixing the output hollow shaft and driven shaft, set up the position of the bearing which
supports the driven shaft.)
Fig. 1 (SWJ25 to 42) Fig. 2 (SWJ50 to 70, SW80 to 200, EW80-H to 200-H)
Note) The dimensions and configurations given in the table below are recommended for the end plate, which also serves as a draw plate.
Table 1: Recommended dimensions for the end plate and bolt and stop ring to use
Size Output shaft
bore diameter
Recommended plate dimension
Bolt for plate
(with spring washer) Stop ring size
φ
D
T H Z Y hole P
SWJ25 Φ12 16 4.5 - - 5.5 - 1-M5 x 15 -
SWJ35 Φ
20
26 6 - - 9 - 1-M8 x 25 -
SWJ42 Φ
25
32 6 - - 9 - 1-M8 x 25 -
SWJ50 Φ30 29.6 9 25 M12 - - 1-M10 x 40 C30
SWJ63 Φ
35
34.6 9 30 M12 - - 1-M10 x 40 C35
SWJ70 Φ
40
39.6 12 34 M12 2-6.6 24 2-M6 x 40 C40
EW/SW80
Φ50 49.6 12 44 M16 2-9 30 2-M8 x 45 C50
EW/SW100
Φ
55
54.6 14 48 M16 2-11 32 2-M10 x 55 C55
EW/SW125
Φ
70
69.5 14 62 M24 2-14 44 2-M12 × 60 C70
EW/SW150
Φ80 79.5 17 70 M24 2-14 52 2-M12 × 65 C80
EW/SW175
Φ
90
89.5 17 80 M30 2-14 60 2-M12 × 65 C90
EW/SW200
Φ
100
99.5 17 89 M30 2-18 65 2-M16 x 75 C100
A(
Output shaft length
)
Output shaft
Driven shaft
L
(
Recommended length
of dri
ven shaft
)
A(
Output shaft length
)
Output shaft
Driven shaft
L
(
Recommended len
gth
o
f driven shaft
)
Y hole
Z tap
2
-
Y hole

2. Removal procedures
(1) Lift the reducer using the lifting bolt.
(2) Loosen the end plate bolt which fixes (axial direction) the reducer to the driven shaft.
(3) Remove any attachments on the tip of the torque arm, which stops the shaft from rotating, so that it moves freely.
(4) Remove the hollow output shaft from the driven shaft while preventing from applying excessive force between it and the
housing. Prepare a draw plate (Table 1) and jack bolt (Table 2). Removal is much easier when the draw plate is used as
shown in Figure 3.
Table 2 Jack Bolt Size Figure 3
Size Output shaft
bore diameter
Jack bolt
(Thread length)
SWJ50 Φ30 M12 x 80
SWJ63 Φ35 M12 x 80
SWJ70 Φ40 M12 x 80
EW/SW80 Φ50 M16 x 100
EW/SW100 Φ55 M16 x 100
EW/SW125 Φ70 M24 x 150
EW/SW150 Φ80 M24 x 150
EW/SW175 Φ90 M30 x 180
EW/SW200 Φ100 M30 x 180
3-2-2. Installation/removal of flange mounting
1. Installation procedures
Mounting the reducer to the driven machine (if radial load does not affect the reducer)
(1) Insert the reducer onto the driven shaft.
(2) Use the taps on the flange surface of the housing for mounting.
SWJ25 to 42: Use the holes on the flange surface of the housing to bolt the housing in place.
Refer to the table and figure on page 12 for mounting information such as bolt size, dimensions, and pitch.
(3) Use the spigot facing on the housing for positioning. (SWJ25 does not have a spigot facing.)
Note) The end plate is not necessary for flange mounting. If the end plate is used to fix the hollow output shaft, the bearing may be damaged
due to the thrust to the bearing on the hollow output shaft.
Mounting the reducer by its flange to the driven machine (if radial load affects the reducer)
(1) Insert the reducer onto the driven shaft.
(2) Adjust the radial runout of the driven shaft and install the reducer so that it is free in the thrust direction.
(3) Use the taps on the flange side of the reducer housing while using the spigot facing on the housing for positioning.
(SWJ25 does not have a spigot facing.)
(4) After fixing the reducer, fix the driven shaft in the thrust direction.
Note) If the driven shaft is fixed in the thrust direction first, the bearing may be damaged due to the thrust to the bearing on the hollow output
shaft.
2. Removal procedures
The reducer is mounted to the driven machine (if radial load does not affect the reducer)
(1) Loosen the flange bolts that fix the reducer to the driven equipment.
(2) Remove the hollow output shaft from the driven shaft while avoiding applying excessive force between it and the housing.
Prepare a draw plate (Table 1) and jack bolt (Table 2). Removal is much easier when the draw plate is used as shown in Figure 3.
The reducer is mounted by its flange to the driven machine (if radial load affects the reducer)
(1) Hold the driven shaft steady in a balanced state.
(2) Loosen the flange that fixes the reducer to the driven equipment.
(3) Remove the hollow output shaft from the driven shaft while avoiding applying excessive force between it and the housing.
Prepare a draw plate (Table 1) and jack bolt (Table 2). Removal is much easier when the draw plate is used as shown in Figure 3.
Output shaft
Stopper
Stop ring
Jack bolt
Draw plate (also used as end plate)
Driven shaft

3-2-3. Installation/removal of foot mounting (EW-H hollow output shaft)
Make sure the driven machine and reducer are aligned properly by referring to these installation procedures: Section 3-1-1. Foot
mount; Section 3-1-2. Flange mount; Section 3-2-1. Installation/removal of torque arm. Improper alignment can cause unexpected
loads which may lead to breakage of the shaft/bearing.
[ 4 ] Connection
Caution
 When connecting the reducer to the motor and load, be careful of the alignment, belt tension, and parallelism of the
pulley. When direct coupling, be careful of the direct coupling accuracy. When setting a belt, adjust the belt tension
correctly. Before operation, securely tighten the pulley and coupling tightening bolts. Otherwise, launching of parts
can cause injury or equipment damage.
 Provide a cover so that rotating parts cannot be touched. Otherwise, injury can occur.
 When rotating the reducer separately, remove the key temporarily attached to the output shaft. Otherwise, injury can
occur.
 Check the direction of rotation before connecting to another machine. A difference in direction can result in injury or
equipment damage.
4-1. Verifying the direction of rotation
Worms are always cut to a right-handed helix. Verify the rotational direction of the input and output shafts.
4-2. Connection
(1) Connecting to the input shaft and output shaft of the reducer
• Do not apply impact or excessive thrust loads to the shaft when installing pulleys, sprockets, or couplings to the reducer
input/output shafts.
• Align accurately. Refer to pulley, sprocket, or coupling catalogs/manuals to ensure alignment accuracy.
• Shaft eccentricity, and radial and axial loads that exceed allowable values may cause vibration or noise, possibly shortening gear,
bearing, and shaft life.
(2) Motor handling when the motor is installed by the customer (applies to motor handling code “Y” for the EWJM/EWM/SWJM/SWM Series)
• Couplings are not used to install the motor to the input shaft of the reducer, because the input shaft is hollow.
• Reducer input shaft bores and keyways are machined for the specified motor capacity. Use the key supplied with the motor.
• Take safety precautions when following the procedures below.
S
t
ep
Installation procedure
Notes
Step
Installation p
rocedure
Notes
1 Place the
reducer so
that the motor
can be
mounted
easily.
Take all necessary
safety precautions
during transportation.
3
Gently insert
the motor
output shaft
into the
reducer input
shaft.
Apply grease to the
motor output shaft and
the reducer input shaft
bore.
Grease brand:
Molybdenum Special
(COSMO OIL)
2 Align the
phases of the
key on the
motor output
shaft to the
keyway on
the reducer
input shaft.
Take all necessary
safety precautions
when transporting the
motor.
Align accurately to
eliminate any shaft
eccentricity.
4 Fully tighten
the supplied
hex bolts to
the motor
flange using
the spring
washers.
The bolts should be
tightened after verifying
the motor has entered
the reducer properly.
Torque the bolts
according to their size
and strength grade.
Note) Even with the same size reducer, motor flange diameters differ depending on the motor size. Similarly, the input bore and keyway
are machined differently.
Note) When connecting the reducer and motor, use the lifting hook on the motor and take all necessary safety precautions.

(3)
In case of the reducer and motor being connected by Jaw-Flex coupling
(Applies to motor handling symbol “Y” for models EWJM42, EWJM50 to 70 double reduction type, SWJM35 to 70.)
• The coupling hub on the reducer side is set (key and set screw) when shipped. Make sure it has not loosened during transport.
• The coupling hub supplied for the motor side is machined with a bore diameter and keyway that matches the specified motor
capacity.
* Collars are provided to adjust the length of the motor shaft. Do not forget to insert them.
Note) Use the key and set screw supplied with the reducer when installing the coupling hub on the motor.
• Use the supplied inserts.
• Motor and flange mounting bolts and spring washers are also supplied. Check against the table shown below.
Motor Capacity
0.1 kW
0.2 kW
0.4 kW
0.75 kW
1.5 kW
2.2 kW
3.7 kW
5.5 kW
Bolt Size
M8 x 25 mm
M8 x 25 mm
M8 x 25 mm
M10 x 30 mm
M10 x
3
0 mm
M12 x
3
0 mm
M12 x 30 mm
M12 x 35mm
Spring washer
M8
M8
M8
M10
M10
M12
M12
M12
Quantity 4 4 4 4 4 4 4 4
• Motor installation procedures: take safety precautions when following the procedures below.
Step Installation procedure Notes
1 Place the reducer so that the motor
can be mounted easily.
Take all necessary safety
precautions during
transportation.
2 Apply a small amount of grease to
the motor output shaft. Insert the
input collar and then attach the
Jaw-Flex coupling. Make sure to
assemble with the key in place.
Then, tighten the set screw with hole
in the key.
Do not hit the Jaw-Flex
coupling with a hammer or
other object when inserting it.
Take all necessary safety
precautions when transporting
the motor.
3 Insert the Jaw-Flex coupling insert
into the coupling on the reducer.
Then assemble it keeping it aligned
to the phase of the coupling.
Make sure the Jaw-Flex
coupling on the motor side fits
into the insert smoothly when
making the connection. Do
not force it in. Realign the
phases and the centers of the
hub and the insert.
4 Fully tighten the supplied hex Bolts to
the motor flange using the spring
washers.
The bolts should be tightened
after verifying the motor has
entered the reducer properly.
Torque the bolts according to
their size and strength grade.
Note) When connecting the reducer and motor, use the lifting hook on the motor and take all necessary safety precautions.
Insert
c
ollar
Flat key
Jaw-Flex
coupling
Set screw
with hole

[ 5 ] Lubrication
Worm gear reducers are filled with lubrication oil and sealed before shipment. They can be used as is without having to add oil.
5-1.Recommended lubrication oil Daphne Alpha Oil TE260 (IDEMITSU)
• Lubrication oil is vital to reducer capacity, life, and efficiency. Use only lubrication oil recommended by Tsubakimoto Chain Co.
.Do not mix the oil with other brands.
• Daphne Alpha Oil TE150 is recommended for reducers that have trouble starting in low temperature environments with an input
speed of 1500 r/min or faster.
• Do not mix with other lubrication oil. This can result in reduced performance and shortened operating life.
• Single reduction gear reducers running at an input speed of 500 r/min or slower can benefit from longer life by switching to Daphne
Alpha Oil TE380.
• Do not change the brand of lubrication oil. Contact your distributor or Tsubakimoto Chain Co. to have the lubrication oil changed.
• Contact your distributor or Tsubakimoto Chain Co. dealer for information about DaphneAlpha Oil TE.
Note) Contact us if the ambient temperature is below -10°C or above 50°C.
5-2Approximate oil volume
• Even with the same size reducer, the oil volume varies depending on the reduction ratio. Use the volumes in the following tables as a
guideline, and always check the oil volume with the oil gauge. (The oil volume is correct when it can be seen in the oil gauge when
the reducer is idle.)
Note) No oil gauge is provided on the EWJ/EWJM series and SWJ/SWJM series.
EWJ/EWJM Series
(Single reduction Reduction ratio: 1/10 to 1/60) Unit: L (Double reduction Reduction ratio: 1/100 to 1/3600) Unit: L
Size
type 25 35 42 50 63 70
Size
type 50 63 70
E
0.08 0.17 0.29 0.55 0.95 1.0 Mounting
direction
B&T
high speed side
0
.10
0.16
0.16
V
V
low
speed side
0.55
0.95
1.0
EW/EWM Series
(Single reduction Reduction ratio: 1/10 to 1/60) Unit: L (Double reduction Reduction ratio: 1/100 to 1/3600) Unit: L
Size
type 80 100 125 150 175 200
Size
type 80 100 125 150 175 200
Mounting
direction
B
1.2
1.7
3.1
5.1
8.4
13
Mounting
direction
B
1.5
2.4
3.7
7.0
11
17
T
2.3
4.1
6.4
11
16
25
V
2.
2
2.9
5.7
10
13
22
V
1.7
2.8
4.8
8.2
12
19
SWJ/SWJM Series
(Single reduction Reduction ratio: 1/10 to 1/60) Unit: L
Size
type 25 35 42 50 63 70
E type
0.08
0.10
0.16
0.55
0.95
1.3
SW/SWM Series
(Single reduction Reduction ratio: 1/10 to 1/60) Unit: L (Double reduction Reduction ratio: 1/100 to 1/3600) Unit: L
Size
type SW80
SW100 SW125 SW150 SW175 SW200
Size
type
SW80 SW100 SW125 SW150 SW175 SW200
Mounting
direction
B
1.0
1.4
2.2
4.2
6.5
8.5
Mounting
direction
B
1.5
1.9
3.1
6.3
9.1
12.5
T
1
.8
2.8
5.1
8.0
13.0
15.0
V
1.9
2.6
4.6
8.0
12.2
15.7
V
1.4
2.1
3.7
5.9
9.6
11.7
5-3. Replacing the lubrication oil
(1) Lubrication oil is vital to reducer capacity, life, and efficiency. Use only lubrication oil recommended by Tsubakimoto Chain Co.
(2) It is not necessary to replace the oil for the EWJ/EWJM series and SWJ/SWJM series. However, if the lubrication oil deteriorates
significantly due to usage conditions, it can be replaced for reassurance. For double reduction type of EWJ / EWJM series,
lubrication has to be changed each of the high speed and the low-speed gear box.
(3) Follow these guidelines to determine when to replace the lubrication oil for models EW/EWM80 to 200 and SW/SWM80 to 200:
• First change: 1000 hours or three months after starting operation, whichever comes first.
• Subsequent changes: 5000 hours or one year depending on operating conditions, whichever comes first.
• Replace the oil earlier if there are signs of significantly reduced oil performance (viscosity, color, etc.).
• It is easier to drain oil while it is warm, such as immediately after operation. However, hot oil may cause burns and is extremely
dangerous. Allow the temperature of the housing to cool to 40 to 50°C before draining the oil.
• Even when the oil level falls below the oil gauge when changing the oil or when the oil has decreased due to whatever conditions, the remaining
oil will occasionally appear to be remaining at the lower end of the oil gauge due to surface tension. Therefore, in managing the oil level, please
check that the oil level is maintained in the middle of the oil gauge.

• Tsubakimoto Chain Co. recommends flushing the inside of the housing with the new oil.
Note) Do not mix the oil with other brands.
Note) No oil gauge is provided on the EWJ/EWJM series and SWJ/SWJM series.
5-4. Supplying grease (Semi-standard package)
• If the mounting direction of the reducer causes the shaft bearing to be face up (where the bearing is located above the oil level), the
bearing must be greased periodically. (Applicable to sizes 80 and above, excludes sizes 70 and below.)
• Models that must be greased are provided with a tapped hole for mounting a grease nipple.
(This is indicated on the external drawings (specification and delivery diagrams) as a grease nipple. See the external drawings
(specification and delivery drawings)).
• A stopper plug (M6 fine threaded hex bolt) is mounted before shipment to prevent oil leakage during transport. Replace it with the
grease nipple supplied with the reducer during installation or before operating. Note, the bearings are greased before shipment.
• Follow the procedures outlined below to supply grease every 1000 hours of operation. Greasing has to be done on installation,
before initial drive and every 1000 hours.
•
Step
Replacement procedures
1
Add grease when the machine is stopped.
2 Supply grease from the grease nipple located on the top of the housing. Use only the recommended grease.
Note) Do not over grease. Doing so may c
ause the reducer to heat
up and
cause the lubrication oil to de
t
eriorate prematurely.
Grease nipple size: A-M6F
5-4-1. Recommended grease (standard package ambient temperature: -10°C to 40°C)
Manufacturer
Brand (industrial all
-
purpose grease JIS grade 2)
EMG
Lubricants
Mobilux EP2 (factory filled)
Idemitsu
Daphne
E
p
o
nex No.
2
Note) A different brand of grease may be used for special packages (high temperature, freezing, etc.) Always supply with the type of lubricant
appropriate for the specifications. Also take note of any precautions documented on the external diagrams (specification and delivery
diagrams).
5-4-2. Approximate greasing volume (*Grease the top of the input shaft.):
Input installed on top: (Same as when equipped with motor.)
Reduction ratio: 1/10 to 1/60 Unit: g
EW Se
ries
SW Series
Size
80
100
1
2
5
150
175
200
Size
80
100
125
150
175
200
20 25 25 25 30 42 20 25 25 25 30 42
Double reduction ratio: 1/100 to 1/3600 Unit: g
EW Series
S
W
Series
Size
80
100
125
150
175
200
Size
80
100
125
150
17
5
200
- - - 20 25 25 - - - 20 25 25
②Input installed on bottom: (Same as when equipped with motor.)
Reduction ratio: 1/10 to 1/60 Unit: g
EW Series
SW Series
Size
80
100
125
150
175
200
Size
80
100
125
150
175
200
10.5 14.5 33 45.5 60 70.5 15 21.5 37 56 79 99
Double reduction ratio: 1/100 to 1/3600 Unit: g
EW Series
SW Series
Size
8
0
100
125
150
175
200
Size
80
100
125
150
175
200
- - - 10.5 14.5 33 - - - 15 21.5 37
Greaseni
pple (opposite side)

[ 6 ] Operation
Warning
(Operation)
Never approach or touch the shaft or other rotating parts during operation. Catching and injury can occur.
Caution
(Operation)
For a specification with a fan cover, do not insert your hand in the fan cover. Otherwise, there is a risk of being caught in those
parts resulting in injury.
The reducer becomes very hot during operation. Be careful not to touch it with your hands or body. Burns can occur.
If a problem occurs, immediately stop operation. Otherwise, electric shock, injury, or fire can occur.
Do not use at above the rated load. Injury or equipment damage can occur.
Do not loosen the oil plug during operation. Lubrication oil can splatter, creating burns.
When reversing operation, be sure to bring the reducer to a full stop before starting reverse operation. Plucking can cause the forward-reverse
operation to damage the reducer or equipment.
The reducer is filled with lubrication oil and plugged before shipment. Replace the plug with the supplied pressure vent before use.
Note 1) Otherwise, oil can leak from the oil seal due to high internal pressure.
Note 2) EWJ/EWJM series (including double reduction models) and SWJ/SWJM series: A pressure vent is not necessary and can be
used as is.
6-1. Double checking before operation
6-1-1. Checking the reducer
Upon completing the installation, check the following prior to operation:
①the reducer is filled with the correct amount of lubrication oil. (The amount of lubrication oil is correct if it can be seen in the oil gauge.)
②the pressure vent is installed. (If the reducer mounting direction is a special design and comes with a grease nipple, install it as
well.)
③the reducer is connected properly to the driven machine.
④all mounting bolts are fully tightened.
⑤the direction of rotation is correct.
For reducers equipped with a motor, also check the following items:
an appropriately sized earth leakage breaker and overcurrent relay is wired into the motor circuitry.
all wiring is correct.
the motor is properly ground.
Make sure the equipment incorporates failsafe measures to prevent accidents from occurring during operation of the reducer, or in the
event the reducer stops working properly.
6-2. Trial run
No trial run is made prior to shipment. For best results, operate the reducer for roughly one day under 1/2 to 1/3 load.
6-3. Load
Loading the reducer above its rated capacity can affect its life and result in damage.
Do not load the reducer above its rated capacity.
6-4. Verification after operation starts
Verify the following after starting operation:
a) There is no abnormal noise, vibration, or overheating.
b) There is no shock or overload.
c) The temperature is not unusually high.
Note) The reducer may generate heat during the first two or three days of operation. This is expected and is not a problem.
However, if the housing temperature exceeds 100°C, it could indicate an undersized reducer, low oil level, or improper
installation, so inspect these as necessary. To prevent burn injuries, do not touch the reducer with your bare hands.