technical data Reducer Worm Reducer Handling

This page describes general matters regarding the handling of the EWJ, EWJM(R), EW, EWM(R), SWJ, SWJM(R), SW, SWM(R), and TD series.

For details, please refer to Instruction Manuals attached to the product.

4. Installation

Install the unit in a location with an ambient temperature between 0°C and 40°C, that is well ventilated and has minimal dust and humidity.

Avoid using the product in places where corrosive liquids or gases are present, or in places where there are flammable or explosive substances.

Also, when using outdoors, please use a cover to protect it from direct rain.

  • (1) When installing or removing the reducer to or from the driven shaft, be sure to turn off the power to the machine or device before performing the work.
  • (2) When attaching or detaching the reducer to or from the driven shaft, be sure to use the hanging bolt on the top of the reducer casing, and never hang wires or the like on the input or output shaft.
  • (3) When installing or removing the reducer from the driven shaft, make sure that the reducer is balanced and stable. Working in an unbalanced state will cause the reducer to rotate, which is extremely dangerous. Always ensure that the reducer is stable.
  • (4) SWJ25 to 63 and SWJM(R)35 to 63 do not have hanging bolts, so hold the reducer with both hands and insert or remove it from the driven shaft with the output shaft parallel to the driven shaft.

4-1. Solid output shaft type

There are two installation methods for the solid output shaft type: Foot mount (EWJ, EWJM(R), EW, EWM(R), TD-S) and flange mounting (SW, SWM80 to 200).

4-1-1. Foot mount (EWJ, EWJM(R), EW, EWM(R), TD-S)

  • - Check that the installation direction is standard.
  • If the installation direction is not standard, the oil volume and some lubrication methods will differ, so please refer to the drawing or inquire.
  • - The installation reference surface should be smooth and strong enough to avoid any strain, and the installation angle should be within ±1°.
  • - Use installation bolts equivalent to JIS strength classification 10.9T.

    Recommended installation bolts

    EWJ・EWJM size EWJ25 EWJ35 EWJ42 EWJ50 EWJ63 EWJ70
    Recommended Bolts M6×15 M8×15 M10×20 M8×25 M10×30 M12×35
    EW/EWM size EW80 EW100 EW125 EW150 EW175 EW200
    Recommended Bolts M12×40 M14×45 M16×55 M20×60 M20×70 M24×80
    TD-S size TD125 TD150 TD175 TD200 TD225 TD250 TD280 TD315
    Recommended Bolts M16×55 M20×60 M20×70 M24×80 M24×80 M30×100 M30×100 M30×110
  • - Never install in a way that causes deformation of the housing.
  • ・The reducer is shipped with lubricating oil sealed inside. The oil filler port is plugged to prevent oil leakage during transport, so please replace the "plug" with the included "pressure vent" before use. If the reducer is operated continuously with the plug in place, the internal pressure may increase, causing oil to leak from the oil seal.

    Note) EWJ25-70, EWJM42-70 (including Double reduction) and SWJ25-70, SWJM35-70 do not require a pressure vent, so please use them in the condition they are delivered.

4-1-2. Flange mounting (EWJ25 to 42, EWJM(R)42, SW80 to 200, SWM(R)80 to 200)

The reducer is fixed using the flange surface of the reducer case. Please note the following points.

1. SW/SWM(R) solid output shaft type
  • (1) Use the tapped holes on the case flange to secure the reducer, and use the case spigot to position it.
  • (2) Adjust the radial runout of the driven shaft, the input/output connection, and the angle, and then install the reducer.
  • (3) Please refer to the table below for the recommended bolt sizes for the flange surface. (The bolt size and depth in the table are tap depths.)

    Note: If you do not use a case spigot and first connect the input and output, and then fix the flange surface, unexpected loads may be applied to the shaft and bearings, which may shorten the life of the reducer.

    Recommended bolt size for flange surface

    Reducer size SW80 SW100 SW125 SW150 SW175 SW200
    Bolt size M10 depth 20 M10 depth 20 M12 depth 25 M12 depth 25 M14 depth 30 M16 depth 30
    Mounting PCD 180 205 255 300 350 380
    Number of attachments Distributed equally in 6 locations Distributed equally in 6 locations Distributed equally in 6 locations Equally distributed in 8 locations Equally distributed in 8 locations Equally distributed in 8 locations
2. For EWJ25-42 and EWJM(R)42

When installing the reducer on the floor or wall, please note the following points.

  • (1) Use the mounting holes on the flange surface to secure the reducer. The end face of the case protrudes beyond the installation surface of the reducer, so be sure to leave a clearance (ΦD, t) or more between the reducer body and the installation surface as shown in the table and diagram below.
  • (2) Adjust the radial runout of the driven shaft, the input/output connection, and the angle, and then install the reducer.
  • (3) Refer to the table below for the recommended bolt size and pitch for the flange surface of the reducer.

Note: If the input and output are connected first and then the flange surface is fixed, unexpected loads may be applied to the shaft and bearings, which may shorten the life of the reducer.

フランジ面取付け穴

Required clearance from the installation surface

size ΦD t
EWJ25 46 3
EWJ35 48 1.5
EWJ42 63 3

Mounting bolt size, number, and pitch

size Mounting bolt size pitch
A		 pitch
B
EWJ25 M6 x 60 4 pieces 57 76
EWJ35 M8 x 80 4 pieces 71 96
EWJ42 M10 x 90 4 pieces 88 111

Recommended tightening torque

size Tightening torque
(N・m)		 Tightening torque
{kgf・m}
EWJ25 4.9 ～ 5.9 0.5 ～ 0.6
EWJ35 12 ～ 14 1.2 ～ 1.4
EWJ42 24 ～ 27 2.4 ～ 2.7

4-2. Hollow output shaft type

There are three methods for preventing the reducer from rotating: "torque arm mounting," "flange mounting," and "Foot mount (EW-H (hollow output shaft type) only)." We recommend a shaft diameter tolerance of g7 for the driven shaft.

  • (1) When inserting the reducer onto the driven shaft, be sure to check that there are no scratches or debris on the outer periphery of the driven shaft or inside the hollow output shaft of the reducer.
  • (2) To make insertion easier, apply grease or molybdenum disulfide to the driven shaft.
  • (3) If it is difficult to insert, gently tap the end face of the hollow output shaft with a soft hammer to insert it. Be careful not to damage the oil seal.
  • (4) The hollow shaft keyway is finished to the new JIS standard. For the key length, please refer to the "Recommended driven shaft length" below.

Recommended driven shaft length (see Figures 1 and 2 below)

series SWJ SW・EW SW・EW・TD TD
Reducer size 25 35 42 50 63 70 80 100 125 150 175 200 225 250 280 315
Output shaft length: A 60 70 80 108 128 130 148 174 200 250 270 290 320 356 404 454
Recommended driven shaft length: L 58 68 78 89 109 106 122 146 170 220 238 258 272 303 344 386

4-2-1. Torque arm installation and removal

1. Installation Procedure

Note) Avoid installing a double-shaft input reducer connected with a line shaft.

  • (1) Attach the torque arm to the reducer with bolts. Note: If you have purchased a torque arm, use the bolts that come with it. If you are fabricating your own torque arm, use bolts with a strength classification 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.
    • ・For SWJ25 to 42, we recommend fixing the output shaft end with an end plate as shown in Figure 1.
    • ・For SWJ50 to 70, SW80 to 200, EW80-H to 200-H (hollow output type), and TD125H to 315H, we recommend using the retaining ring groove on the hollow output shaft and securing it with a stop ring and end plate as shown in Figure 2. (For detailed dimensions of the hollow output shaft, refer to the product page.)
  • (4) After the installation position of the reducer has been determined, fix the torque arm so that the reducer does not rotate together with the driven shaft. At that time, make sure that the torque arm has some freedom in the axial direction.
    • Note: Fixing the tip of the torque arm before the reducer may damage the reducer, so please be sure to follow the work procedure carefully. (EW80-H to 200-H are Foot mount. After fixing the output hollow shaft and driven shaft, set the position of the bearing that supports the driven shaft.)
    • Note) For the manufacture of end plates, we recommend the dimensions and shapes shown in Table 1 below, which also serve as punched plates.

Figure 1 SWJ25-42

図1

Figure 2 SWJ50-70, SW80-200
EW80-H~200-H・TD125H~315H

図2

Table 1 Recommended dimensions for end plates (also used as punch plates)

size Output shaft
Hole Diameter		 Recommended plate dimensions Plate bolts
(with spring washer)		 Stop ring
size
ΦD T H Z Y Kiri P
SWJ25 Φ12 16 4.5 - - 5.5 - 1-M5×15 -
SWJ35 Φ20 26 6 - - 9 - 1-M8×25 -
SWJ42 Φ25 32 6 - - 9 - 1-M8×25 -
SWJ50 Φ30 29.6 9 25 M12 - - 1-M10×40 C 30
SWJ63 Φ35 34.6 9 30 M12 - - 1-M10×40 C 35
SWJ70 Φ40 39.6 12 34 M12 2- 6.6 24 2-M6×40 C 40
EW/SW80 Φ50 49.6 12 44 M16 2- 9 30 2-M8×45 C 50
EW/SW100 Φ55 54.6 14 48 M16 2-11 32 2-M10×55 C 55
EW/SW125 Φ70 69.5 14 62 M24 2-14 44 2-M12×60 C 70
EW/SW150 Φ80 79.5 17 70 M24 2-14 52 2-M12×65 C 80
EW/SW175 Φ90 89.5 17 80 M30 2-14 60 2-M12×65 C 90
EW/SW200 Φ100 99.5 17 89 M30 2-18 65 2-M16×75 C100
TD125 Φ70 69.5 14 62 M24 2-14 44 2-M12×60 C 70
TD150 Φ80 79.5 17 70 M24 2-14 52 2-M12×65 C 80
TD175 Φ90 89.5 17 80 M30 2-14 60 2-M12×65 C 90
TD200 Φ100 99.5 17 89 M30 2-18 65 2-M16×75 C100
TD225 Φ110 109.6 20 99 M30 2-18 65 2-M16×85 C110
TD250 Φ125 124.4 20 113 M30 2-18 70 2-M16×85 C125
TD280 Φ130 129.4 24 118 M36 2-22 80 2-M20×100 C130
TD315 Φ160 159.4 24 146 M36 2-22 85 2-M20×100 C160

2. Removal procedure

  • (1) Hang the reducer using the hanging bolts.
  • (2) Loosen the bolts on the end plate that secure the reducer to the driven shaft (axial direction).
  • (3) Free the tip of the torque arm that stops the rotation direction of the shaft.
  • (4) Remove the hollow output shaft from the driven shaft so that no excess force is applied between the case and the hollow output shaft. Prepare the removal plate (Table 1) and jack bolt (Table 2) and attach the jack bolt as shown in Figure 3 to ensure smooth removal.

Table 2 Jack bolt dimensions

size Output shaft hole diameter Jack bolt
(Fully threaded)		 size Output shaft hole diameter Jack bolt
(Fully threaded)
SWJ50 Φ30 M12×80 TD125H Φ70 M24×150
SWJ63 Φ35 M12×80 TD150H Φ80 M24×150
SWJ70 Φ40 M12×80 TD175H Φ90 M30×180
EW/SW 80 Φ50 M16×100 TD200H Φ100 M30×180
EW/SW100 Φ55 M16×100 TD225H Φ110 M30×180
EW/SW125 Φ70 M24×150 TD250H Φ125 M30×180
EW/SW150 Φ80 M24×150 TD280H Φ130 M36×250
EW/SW175 Φ90 M30×180 TD315H Φ160 M36×250
EW/SW200 Φ100 M30×180

Figure 3: Jack bolt installation instructions

図3

4-2-2. Flange installation and removal

1. Installation Procedure

When fixing the reducer to the driven machine (when no radial load acts on the reducer)
  • (1) Insert the reducer onto the driven shaft.
  • (2) When fixing, use the taps on the flange surface of the case.
    • - For SWJ25 to 42, use the holes on the flange surface to secure with bolts.
    • - For bolt size, mounting dimensions, pitch, etc., please refer to the table and diagram in item 2 of 4-1-2 above.
  • (3) We recommend using the case's pilot joint for positioning. (SWJ25 does not have a pilot joint.)

    Note: End plates are not required for flange mounting.
    If the hollow output shaft is fixed with an end plate, thrust force will be applied to the hollow output shaft bearing, which may damage the bearing.

When fixing the reducer to the driven machine by flange mounting (when a radial load acts on the reducer)
  • (1) Insert the reducer onto the driven shaft.
  • (2) Adjust the radial runout of the driven shaft, leaving the axial direction free, and then install the reducer.
  • (3) We recommend using the taps on the flange surface of the case to secure the reducer, and the spigot on the case for positioning. (SWJ25 does not have a spigot.)
  • (4) After fixing the reducer, fix the axial direction of the driven shaft.

    Note: If the axial direction of the driven shaft is fixed first, a thrust force will be applied to the hollow shaft bearing, which may damage the bearing.

2. Removal procedure

When the reducer is fixed to the driven machine (when no radial load acts on the reducer)
  • (1) Loosen the flange bolts that secure the driven machine and reducer.
  • (2) Remove the hollow output shaft from the driven shaft so that no excess force is applied between the case and the hollow output shaft. Prepare the removal plate (Table 1) and jack bolt (Table 2) and attach the jack bolt as shown in Figure 3 to ensure smooth removal.
When fixing the reducer to the driven machine by flange mounting (when a radial load acts on the reducer)
  • (1) Keep the driven shaft in a balanced and stable state.
  • (2) Loosen the flange bolts that secure the driven machine and reducer.
  • (3) Remove the hollow output shaft from the driven shaft so that no excess force is applied between the case and the hollow output shaft. Prepare the removal plate (Table 1) and jack bolt (Table 2) and attach the jack bolt as shown in Figure 3 to ensure smooth removal.

4-2-3. Attaching and Removing Foot mount (EW-H Output Hollow Shaft Type)

When installing and removing, be sure to center the driven machine and reducer by referring to Section 4-1-1 for Foot mount, Section 4-2-1 for torque arm installation, and Section 4-2-2 for flange installation.

If the centering is incorrect, unexpected loads may occur, which may damage the bearings, shafts, etc.