Jaw Couplings Set Screw Type

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.
 

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.
 

■ 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.
 

■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.
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.
 

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)	－	Spacer	－	d1	－	d2
GCJS30 GCPJSWK40	－ －	WH BL	－ －	8 12	－ －	10 15

 

Part Number		Adjusting ring (Color selection)	d1, d2 selection (But d1≤d2)										L	ℓ	B	C	F	Clamp Screw
Type	D																	M	Tightening torque (N·m)
GCJS	14	BL(Blue) WH(White) RD(Red)	4	5	6								22	7	6	1	3.5	M3	0.7
	20			5	6	6.35	8						30	10	8		5
	30						8	10	12	14			35	11	10	1.5	5.5	M4	1.7
	40							10	12	14	15	16	66	25	12	2	12.5	M5	4

 

Part Number		Adjusting ring (Color selection)	d1, d2 selection (But d1≤d2)					L	ℓ	B	C	F	Clamp Screw
Type	D												M	Tightening torque (N·m)
GCJSLK GCJSRK GCJSWK	30	BL(Blue) WH(White) RD(Red)	10	12	14			35	11	10	1.5	5.5	M4	1.7
	40		10	12	14	15	16	66	25	12	2	12.5	M5	4

■Characteristic Value

Part Number		Allowable 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)
Type	D	BL	WH	RD		BL	WH	RD	BL	WH	RD
GCJS	14	0.7	1.2	2	1.0	0.15	0.10	0.10	8	14	22	45000	2.1×10－7	+0.6 0	7.3
	20	1.8	3	5		0.20	0.15		16	29	55	31000	1.0×10－6	+0.8 0	18
	30	4	7.5	12.5		0.20	0.15		46	73	130	21000	5.9×10－6	+1.0 0	46
	40	4.9	10	17		0.15	0.10		380	570	1200	15000	4.0×10－5	+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 Number		Allowable 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)
Type	D	BL	WH	RD		BL	WH	RD	BL	WH	RD
GCJSLK GCJSRK GCJSWK	30	4	7.5	12.5	1.0	0.20	0.15	0.10	46	73	130	21000	5.8×10－6	+1.0 0	45
	40	4.9	10	17		0.15	0.10		380	570	1200	15000	3.8×10－5	+1.2 0	150

Press the adjusting ring into the main body to assemble.