Worm gear head EWJMK, EWMK

Product photo
  • General-purpose gear heads for servo applications achieving high economic efficiency and short lead-time.
  • The Worm Gear Head EWJMK and EWMK are high-strength, right-angle shaft type capable of quiet operation.
  • Output shaft : Solid
  • Compatible servo motor : 0.2~7kW
  • Reduction ratio : 1/10~1/60

Features

  • ・Economical

    General-purpose gear heads are designed for servo motors, allowing us to quickly deliver economical products.

  • ・Low Noise & Low Vibration

    Unlike other types of gear transmission, the worm gear considerably reduces vibration and noise due to sliding contact.

  • ・High Precision & Compact

    Basic foot mount type with well-balanced optimum design delivers compactness and high precision.

  • ・Output shaft backlash (These are approximate values. )

    Units: arcmin
    Size EWJMK35 EWJMK42 EWJMK50 EWJMK63 EWJMK70 EWMK80 EWMK100
    Angle 40 30 25 35 30 25

    ※These values are not guaranteed.

Catalogs ・Instruction Manuals

Model No. examples

EWJMK 35 E 10 L - □□□C

Type

Size

Mounting Position

Reduction ratio

Shaft Arrangement

Mount code
See Table below. See Table below. (Clamp type )

EWJMK・EWMK
Mounting Position E, T V
Shaft Arrangement

■ Tsubaki model No. navigation

Selected model No. :

*Select each item in order from the left to make sure a valid model number is generated.

Series Size Mounting Position Reduction ratio Shaft Arrangement Mount code





E
W







Please refer to the motor mount dimension drawings below,
and select the specific mount code.

S
W


Series

EWJMK・EWMK:This model is primarily for foot mounting. This specifies the EWJMK Series for sizes 70 or smaller, and the EWMK Series for sizes 80 or above.

SWJMK・SWMK:This model is primarily for flange mounting or shaft mounting. This specifies the SWJMK Series for sizes 70 or smaller, and the SWMK Series for sizes 80 or above.

Size

This indicates the size of the gear reducer.

Mounting Position

E or  T:E: On this type, it can be mounted in any direction. (Applies to EWJMK and SWJMK Series)
T: On this type, the input shaft is located above the output shaft. (Applies to EWMK and SWMK Series)

B:On this type, the input shaft is located below the output shaft.

V:On this type, the output shaft is vertical.

Refer to the diagram below for details.

Reduction ratio

This indicates the reduction ratio.

Shaft Arrangement

This shows the relation of the input and output shafts to the mounting surface.

Refer to the diagram below for details.

Mount code

Specify the mount code that corresponds to the motor to be mounted.


List of Models

※Click the model No. for detailed information. Expand all Collapse all

Size 35 (Model No. EWJMK35~)

Size 42 (Model No. EWJMK42~)

Size 50 (Model No. EWJMK50~)

Size 63 (Model No. EWJMK63~)

Size 70 (Model No. EWJMK70~)

Size 80 (Model No. EWMK80~)

Size 100 (Model No. EWMK100~)

Motor Mounting Dimension Drawings

Units :mm

Size Mount code
Table of Compatible Motors
by Manufacturers
Coupling Motor Mounting Dimensions
Model No. Allowable Torque
N・m
MA MB MC MD ME ML MS MT
EWJMK35 E4DC NES70W 7 □60 Φ50G7 M5Depth 10
(PCD70)
5 80 25 Φ8 M3
E4HC 30 Φ14
EWJMK42 E4DC NES70W 7 □60 Φ50G7 M5Depth 10
(PCD70)
5 80 25 Φ8 M3
E4HC 30 Φ14
EWJMK50 G2HC NES250W 25 □80 Φ70G7 M6Depth 10
(PCD90)
5 --- 30 Φ14 M4
G5LC 40 Φ19
EWJMK63 G2HC
(SWJMK only )
NES250W 25 □80 Φ70G7 M6Depth 10
(PCD90)
5 --- 30 Φ14 M4
G5LC 40 Φ19
K2LC NES800W 80 □130 Φ110G7 M8Depth 13
(PCD145)
5 --- 40 Φ19 M6
K3YC 55 Φ24
L1MC NES1300W 130 □176 Φ114.3G7 M12Depth 16
(PCD200)
8 --- 55 Φ22 M6
L1PC 55 Φ28
L1RC 79 Φ35
EWJMK70 G2HC
(SWJMK only )
NES250W 25 □80 Φ70G7 M6Depth 10
(PCD90)
5 --- 30 Φ14 M4
G5LC
(SWJMK only )
40 Φ19
K2LC NES800W 80 □130 Φ110G7 M8Depth 13
(PCD145)
5 --- 40 Φ19 M6
K3YC 55 Φ24
L1MC NES1300W 130 □176 Φ114.3G7 M12Depth 16
(PCD200)
8 --- 55 Φ22 M6
L1PC 55 Φ28
L1RC 79 Φ35
EWMK80 K2LC NES800W 80 □130 Φ110G7 M8Depth 13
(PCD145)
5 --- 40 Φ19 M6
K3YC 55 Φ24
L1MC NES1300W 130 □176 Φ114.3G7 M12Depth 16
(PCD200)
8 --- 55 Φ22 M6
L1PC 55 Φ28
L1RC 79 Φ35
EWMK100 L1MC NES1300W 130 □176 Φ114.3G7 M12Depth 16
(PCD200)
8 --- 55 Φ22 M6
L1PC 55 Φ28
L1RC 79 Φ35