(!)Due to Microsoft's end of support for Internet Explorer 11 on 15/06/2022, this site does not support the recommended environment.
Instead, please kindly use other browsers like Google Chrome, Microsoft Edge or Mozilla Firefox.

Jaw Couplings Set Screw Type

Jaw Couplings Set Screw Type
  • Volume Discount

· GCJS/ GCJSLK/ GCJSRK/ GCJSWK Jaw Couplings Set Screw Type.
· Jaw Couplings Application: Stepping Motor / Encoder.
· Maximum Rotational Speed Range: 10001~78000 (r/min).
· Maximum Rotational Speed: 10000 (r/min).
· Allowable Angular Misalignment: 1
· Jaw Couplings Body material: Aluminum Alloy.
· The spacer is made of Polyurethane and thus, can absorb vibration efficiently.
· Shaft Tightening Method: Set Screw
· Spacer Selectable Color: Blue, White and Red.
· Operating Temperature: -20°C to 60°C.
· Excellent torque transmission performance has been achieved by press-fitting the spacer into the hub.

Coupling Product Overview

The claw Coupling, also known as the plum Coupling, is composed of two Coupling metal claw discs and an elastomer resin adjusting ring.
The resin adjusting ring can alleviate the inertia load impact when starting and stopping. Easy to disassemble and assemble.
Applicable motor types: recommended for stepping motors and universal motors.
 

Coupling Product Feature

The features of claw Coupling are as follows:
Simple structure, no lubrication, convenient repair, easy inspection, maintenance free, and continuous long-term operation.
Urethane elastic parts are wear-resistant and oil-resistant, have large carrying capacity, long service life, and are safe and reliable.
They have excellent damping, cushioning and electrical insulation properties. They have great axial, radial and angular compensation capabilities.
With simple structure, small radial dimension, light weight, and small moment of inertia, they are suitable for medium and high speed applications.
 

Dimensional Coupling Drawing

Dimensional drawing of claw Coupling

Dimensional drawing of claw Coupling
 
Standard
Bore
Keywayed BoreMaterialSurface
Treatment
d1
(One Side)
d2
(One Side)
d1, d2
(Both Sides)
HubSpacerSet
Screw
HubSet
Screw
GCJSGCJSLKGCJSRKGCJSWKAluminum AlloyPolyurethaneSCM435Clear AnodizeBlack Oxide

Coupling Specifications Overview

Overview/Features
SelectionColorHardness Shore A
BLBlue80
WHWhite92
RDRed98

Coupling Precautions

■ Calibration and adjustment
1. The Coupling allows axis deviation, and transmits rotation angle and torque, but when the axis deviation exceeds the allowable value, vibration will occur or the service life will be drastically reduced.
Be sure to make calibration and adjustment.
2. Axis deviation includes lateral misalignment (parallel error of two axes), angular misalignment (angular error of two axes) and axial amplitude (axial movement of shaft).
Please calibrate and adjust the shaft to ensure that the axis deviation is below the allowable value recorded in the dimension and performance table of each product.
3. The allowable value of axis deviation recorded in the dimension and performance table refers to the situation when either lateral misalignment, angular misalignment or axial amplitude occurs alone. When more than two axis deviations occur at the same time, the corresponding allowable values are halved respectively.
4. Axis deviation not only occurs when assembling to the device, but also is caused by vibration, thermal expansion and bearing wear in operation. Therefore, it is recommended to set the axis deviation below 1/3 of the allowable value.
 

Example of Use Coupling

Use example of Coupling 1) motor × gear boxUse example of Coupling 2) motor × ball screw
Use example of Coupling 1: motor × gearboxUse example of Coupling 2: motor×ball screw
 
Use example of Coupling 3) motor × encoderUse example of Coupling 4) motor × measuring tester
Use example of Coupling 3: motor×encoderUse example of Coupling 4: motor×measuring tester

Coupling Usage Method

■Mounting method
STEP1 Insert the Coupling
Confirm that the clamping bolt has been unscrewed, and then remove the dust, foreign matter and oil from the shaft and Coupling bore.
Then, when inserting the Coupling into the shaft, please be careful not to put the disc under excessive stress such as compression or tension.
STEP2 Use fixture to adjust
Please use fixture to adjust and fix the concentricity of the left and right hubs of the Coupling with high accuracy.
STEP3 Simple lateral misalignment and angular misalignment confirmation
Under the condition of unscrewed bolts, make the Coupling slide axially and confirm its smooth movement.
Then, rotate the Coupling to make sure it moves smoothly.
Lateral misalignment is not allowed for single disc type Coupling, so carry out positioning securely.
Simple lateral misalignment confirmation  Simple angular misalignment confirmation

STEP4 Installation
Please adjust the shaft insertion amount according to the dimension ℓ in the product catalog, and use a torque wrench to tighten with the specified torque.
* If the specified torque cannot be reached once, please cross fasten the left and right clamps twice or three times.
 

Coupling Related Products

(Economy series) GTR plum-shaped Coupling Clamping bolt fixing type/Clamping bolt with keyway typeCoupling Plum-shaped clamping screw fixing type JAAC buffer part material is blind hole (corresponding to LK8-C)Plum-shaped clamping screw fixing type SJCM
GTR plum-shaped Coupling Clamping bolt fixing type/Clamping bolt with keyway typeCouplingPlum-shaped clamping screw fixing type


Coupling Specification Table

Please order after selecting part number and parameters according to the selection steps Coupling Specification Table to Coupling Specification Table. Please specify the shaft bore dia. within the range of d1≤d2.
Part Number (TypeType·DD)SpacerSpacerd1d1d2d2
GCJS30
GCPJSWK40

WH
BL

8
12

10
15
 
Part NumberAdjusting ringAdjusting ring
(Color selection)
d1d1, d2d2 selection (But d1≤d2)LBCFClamp Screw
TypeTypeDDMTightening torque (N·m)
GCJS14BL(Blue)
WH(White)
RD(Red)
456       227613.5M30.7
20 566.358     301085
30    8101214  3511101.55.5M41.7
40     1012141516662512212.5M54
 
Part NumberAdjusting ringAdjusting ring
(Color selection)
d1d1, d2d2 selection (But d1≤d2)LBCFClamp Screw
TypeTypeDDMTightening torque (N·m)
GCJSLK
GCJSRK
GCJSWK
30BL(Blue)
WH(White)
RD(Red)
101214  3511101.55.5M41.7
401012141516662512212.5M54

■Characteristic Value
Part NumberAllowable torque
(N·m)
Allowable
angular misalignment
(°)
Allowable lateral misalignment
(mm)
Static torsional
stiffness
(N·m/rad)
Maximum
rotational speed
(r/min)
Moment of inertia
(kg·m2)
Allowable
axial amplitude
(mm)
Weight
(g)
TypeDBLWHRDBLWHRDBLWHRD
GCJS140.71.221.00.150.100.1081422450002.1×10-7+0.6
0
7.3
201.8350.200.15162955310001.0×10-6+0.8
0
18
3047.512.50.200.154673130210005.9×10-6+1.0
0
46
404.910170.150.103805701200150004.0×10-5+1.2
0
150
The allowable torque varies with temperature.The allowable torque varies with temperature.
Lateral misalignmentLateral misalignment, angular misalignment and axial amplitude are all single allowable values. If there are multiple deviations at the same time, the allowable value of each deviation will be reduced to 1/2 of the original value.
 
Part NumberAllowable torque
(N·m)
Allowable
angular misalignment
(°)
Allowable lateral misalignment
(mm)
Static torsional
stiffness
(N·m/rad)
Maximum
rotational speed
(r/min)
Moment of inertia
(kg·m2)
Allowable
axial amplitude
(mm)
Weight
(g)
TypeDBLWHRDBLWHRDBLWHRD
GCJSLK
GCJSRK
GCJSWK
3047.512.51.00.200.150.104673130210005.8×10-6+1.0
0
45
404.910170.150.103805701200150003.8×10-5+1.2
0
150
Press the adjusting ring into the main body to assemble.Press the adjusting ring into the main body to assemble.

Specification Table
Please order after selecting part number and parameters according to the selection steps to . Please specify the shaft bore dia. within the range of d1≤d2.
Part Number (Type·D)Spacerd1d2
GCJS30
GCPJSWK40

WH
BL

8
12

10
15
 
Part NumberAdjusting ring
(Color selection)
d1, d2 selection (But d1≤d2)LBCFClamp Screw
TypeDMTightening torque (N·m)
GCJS14BL(Blue)
WH(White)
RD(Red)
456       227613.5M30.7
20 566.358     301085
30    8101214  3511101.55.5M41.7
40     1012141516662512212.5M54
 
Part NumberAdjusting ring
(Color selection)
d1, d2 selection (But d1≤d2)LBCFClamp Screw
TypeDMTightening torque (N·m)
GCJSLK
GCJSRK
GCJSWK
30BL(Blue)
WH(White)
RD(Red)
101214  3511101.55.5M41.7
401012141516662512212.5M54

■Characteristic Value
Part NumberAllowable torque
(N·m)
Allowable
angular misalignment
(°)
Allowable lateral misalignment
(mm)
Static torsional
stiffness
(N·m/rad)
Maximum
rotational speed
(r/min)
Moment of inertia
(kg·m2)
Allowable
axial amplitude
(mm)
Weight
(g)
TypeDBLWHRDBLWHRDBLWHRD
GCJS140.71.221.00.150.100.1081422450002.1×10-7+0.6
0
7.3
201.8350.200.15162955310001.0×10-6+0.8
0
18
3047.512.50.200.154673130210005.9×10-6+1.0
0
46
404.910170.150.103805701200150004.0×10-5+1.2
0
150
The allowable torque varies with temperature.
Lateral misalignment, angular misalignment and axial amplitude are all single allowable values. If there are multiple deviations at the same time, the allowable value of each deviation will be reduced to 1/2 of the original value.
 
Part NumberAllowable torque
(N·m)
Allowable
angular misalignment
(°)
Allowable lateral misalignment
(mm)
Static torsional
stiffness
(N·m/rad)
Maximum
rotational speed
(r/min)
Moment of inertia
(kg·m2)
Allowable
axial amplitude
(mm)
Weight
(g)
TypeDBLWHRDBLWHRDBLWHRD
GCJSLK
GCJSRK
GCJSWK
3047.512.51.00.200.150.104673130210005.8×10-6+1.0
0
45
404.910170.150.103805701200150003.8×10-5+1.2
0
150
Press the adjusting ring into the main body to assemble.

Part Number 

CAD Data download and 3D preview are not available because the part number has not yet been determined.

  • *In order to open the CAD Data download and 3D preview screen, the part number must be fixed.
  • Please confirm the part number from "Specification / Dimension"on the left side, and then perform the CAD Data Download / 3D Preview operation.
Loading...
Part Number
GCJS20-BL-5-8
GCJS20-BL-8-8
GCJS20-RD-6-8
Part NumberStandard Unit PriceMinimum order quantityVolume DiscountDays to ShipShaft Bore Dia. 1 d1 (or d)
(Ø)
Allowable Torque Range
(N•m)
Allowable Torque
(N•m)
Allowable Lateral Misalignment
(mm)
Spacer (Color)

SGD 20.33

1 Piece(s)Available 7 Day(s) 51.01~3.001.80.2BL (Blue)

SGD 20.60

1 Piece(s)Available 6 Day(s) 81.01~3.001.80.2BL (Blue)

SGD 20.38

1 Piece(s)Available 7 Day(s) 63.01~5.0050.1RD (Red)

Loading...

  1. 1
 

Basic Information

Series Name Jaw Shaft Bore Dia. 2 d2 (or d)(Ø) 8 O.D.(Ø) 20
Overall Length(mm) 30 Application Stepping Motor / Encoder Features High Torque Type / Low Moment of Inertia / Vibration Insulation
Allowable Misalignment Angular Misalignment / Eccentricity / Axial Misalignment Max. Rotational Speed Range(r/min) 10001~78000 Body Material Aluminum Alloy
Allowable Angular Misalignment(deg) 1 Product Category Coupling Main Body Allowable Lateral Misalignment Range(mm) 0.02~0.2
Max. Rotational Speed(r/min) 10000 / 31000 Buffer Material Polyurethane Operating Temperature(°C) -20::60
Allowable Axial Misalignment(mm) +0.8 Moment of Inertia(kg・m2) 1.0×10-6 Shaft Bore Shape Standard Bore
Shaft Tightening Method Set Screw

Frequently asked question (FAQ)

Question: What are the characteristics of claw couplings?
Answer: Claw couplings can absorb vibration, compensate radial and angular deviation, and are maintenance free, oil resistant and electrically insulated.
Question: Claw couplings can absorb vibration, compensate radial and angular deviation, and are maintenance free, oil resistant and electrically insulated.
Answer: Applicable motor types for claw couplings: recommended for stepping motors and universal motors.
Question: How to select according to the purpose, environment, working conditions?
Answer: Please refer to the MISUMI website.
Question: What is a coupling?
Answer: A coupling is a part that connects two different rotating bodies (motor shaft, ball screw, etc.) and aims at transmitting torque. The load of assembly adjustment is reduced by absorbing the axis deviation (lateral misalignment, angular misalignment and axial amplitude) between rotating bodies. And in case of accidental overload, the coupling is destroyed and the rotating bodies are disconnected to protect the expensive power part and the whole device.

Check other FAQ (1 items) Hide

Tech Support

Factory Automation, Electronics, Tools, & MRO (Maintenance, Repair and Operations)
Tel:(65) 6733 7211 / FAX:(65) 6733 0211
9:00am - 6:00pm (Monday - Friday)