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.

Which disc type coupling is better, single disc type or double disc type?

Double disc type can absorb angular misalignment and lateral misalignment, but the total length will increase. Although the total length of the single disc type is short, it is only suitable for applications with narrow space because lateral misalignment is not allowed in the structure. Special attention should be paid to centering during use.

Abnormal sound or vibration occurs during use of disc type coupling.

When a servo motor is used, the frequency of the mechanical resonance suppression filter is set as its inherent vibration frequency in the control system to suppress sound and vibration. When using a stepping motor, the rotational speed can be finely adjusted, or the vibration can be absorbed and suppressed by the high damping rubber type coupling with obvious attenuation effect.

How to achieve the effect of applicable lateral misalignment and angular misalignment in product design?

The plate spring formed by the slit allows lateral misalignment, angular misalignment and end play.

What does the product need for applications of lateral misalignment and angular misalignment?

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.

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(5 Part Numbers Available)

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Part Number Complete

E-LMCPSW26-[5,6,6.35,7,8,9,9.525,10,11,12,14]-[5,6,6.35,7,8,9,9.525,10,11,12,14]

Shaft Bore Dia.1 d1 (or d) Shaft Bore Dia. 2 d2 (or d) O.D. Overall Length Allowable Torque Allowable Lateral Misalignment type Days to Ship

Specification/Dimensions

Shaft Bore Dia.1 d1 (or d)(Ø)
5

6

6.35

7

8

9

9.525

10

11

12

12.7

14

15

16

17

18

19

20
Clear
Shaft Bore Dia. 2 d2 (or d)(Ø)
5

6

6.35

7

8

9

9.525

10

11

12

12.7

14

15

16

17

18

19

20
Clear
O.D.(Ø)
26

32

34

39

44
Clear
Overall Length(mm)
35

41

45

50
Clear
Allowable Torque(N•m)
1.5

2

3

6

9
Clear
Allowable Lateral Misalignment(mm)
0.15

0.17

0.22
Clear
type
- E-LMCPSW
Clear

Days to Ship

All

11 Day(s) or Less

16 Day(s) or Less
Clear

Specify Alterations

Double Disc Couplings Set Screw Type

Name: Double Disc Couplings Set Screw Type
Brand: MISUMI
Availability: PreOrder

Check FAQ of this product (5 items)

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MISUMI

MiSUMi Economy

MISUMI

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Product Description

This is an economy item, The price is cheaper than the MISUMI standard product.

Product Overview of Flexible Shaft Couplings

Flexible Shaft Couplings is made of several sets of discs (stainless steel sheet) bolted staggered with two coupling halves, each set of discs by several pieces of stacked set.
The Flexible Shaft Couplings relies on the elastic deformation of the disc to compensate for the relative displacement of the two shafts connected, is a high-performance flexible coupling with strong metal components.
It is characterized by compact structure, zero backlash, high strength, long service life, no rotating clearance, unaffected by temperature and oil, acid and alkali resistant and corrosion resistant.
Applicable motor types: Recommended for servo motors, stepper motors and general motors.

Dimensional Drawing of Flexible Shaft Couplings

Set Screw Type
Flexible Shaft Couplings

Material table

Type	Part	Material	Surface Treatment	Accessory
E-LMCPSW	Hub	Aluminum Alloy	Clear Anodize	Set Screw
E-LMCPSW	Screw	Stainless Steel	-	Set Screw

Specification Table of Flexible Shaft Couplings

Flexible Shaft Couplings, Please follow the selection steps

～

to select the part no. Please specify the shaft hole diameterwithin the range of d1≤d2.

Part No.(Type·D)	-	d₁	-	d₂
E-LMCPSW26	-	5	-	10
E-LMCPSW39	-	11	-	18

Part No.		d₁、d₂Shaft Hole Dia.(d₁≤d₂)																				L
Type	D	d₁、d₂Shaft Hole Dia.(d₁≤d₂)																				L
E-LMCPSW	19	＊3	＊4	＊5	6	6.35	7	8														27
	26			＊5	6	6.35	7	8	9	9.525	10	11	12		14							35
	32			＊5	6	6.35		8	9	9.525	10	11	12	12.7	14	15						41
	34			＊5	6	6.35		8	9	9.525	10	11	12	12.7	14	15	16					45
	39							8	9	9.525	10	11	12	12.7	14	15	16	17	18			50
	44							8	9	9.525	10	11	12	12.7	14	15	16	17	18	19	20	50

d1, d2* size products without keyway holes.

Part No.		L	F	Set Screw		Rated Torque (N·m)	Allowable Axial Misalignment (m·m)	Static Torsional Spring Constant (N·m/rad)	Maximum Rotational Speed (r/min)	Compensation Coefficient	Mass (g)
Type	D	L	F	M	Tightening torque N.m	Rated Torque (N·m)	Allowable Axial Misalignment (m·m)	Static Torsional Spring Constant (N·m/rad)	Maximum Rotational Speed (r/min)	Compensation Coefficient	Mass (g)
E-LMCPSW	19	27	4.4	M2.5	1.2	1	0.12	700	10000	1	19
	26	35	5.7	M4	1.7	1.5	0.15	1850	10000	1	29
	32	41	6.1	M4	1.7	2	0.17	2850	10000	1	60
	34	45	7.1	M4	1.7	3	0.17	4050	10000	1	69
	39	50	7.5	M5	4	6	0.22	9000	10000	1	101
	44	50	7.5	M5	4	9	0.22	10000	10000	1	190

Alterations of Flexible Shaft Couplings

Shaft Hole Dia d₁ · d₂	b(Keyway Width)		t Keyway Depth	Keyway Nominal Dim. b X h
Shaft Hole Dia d₁ · d₂	LK	RK	t Keyway Depth	Keyway Nominal Dim. b X h
6 ~ 7.9	2	2	1	2x2
8～10	3	3	1.4	3x3
11～12	4	4	1.8	4x4
13～17	5	5	2.3	5x5
18～22	6	6	2.8	6x6

Product Features of Flexible Shaft Couplings

■Main characteristics of Flexible Shaft Couplings
1. Strong capability to compensate for misalignment of two shafts, offering twice the angular displacement compared to Jaw couplings, lower reactionary forces during radial displacement, high flexibility, and allows for certain axial,radial, and angular displacements.
2. Provides significant vibration damping effects, operates without noise, and wear-free.
3. Can safely operate under conditions of shock and vibration.
4. High transmission efficiency, up to 99.86%, particularly suitable for medium and high-speed, high-power transmission.
5. Simple structure, lightweight, small volume, and convenient for assembly and disassembly. Installation and removal can be done without moving the machine (refers to the type with an intermediate shaft) and does not require lubrication.
6. Can accurately transmit rotational speed, operates without slip, suitable for the transmission of precision machinery.

Example Use of Flexible Shaft Couplings

Precautions of Flexible Shaft Couplings

■Calibration adjustment of Flexible Shaft Couplings
1. The coupling allows shaft center deviation and transmits rotation angle and torque. However, when the shaft center deviation exceeds the allowable value, vibration will occur or the service life will be drastically reduced.
2. Axis deviation includes eccentricity (parallel error of two axes), declination (angular error of two axes), and axial amplitude (axial movement of the shaft).
Please calibrate and adjust the shaft to ensure that the axis center deviation is below the allowable value stated in the dimensions and performance table of each product.
3. The allowable value of axial misalignment stated in the dimensions and performance table refers to the situation when one of eccentricity, declination, or axial amplitude occurs alone.
When more than two axis deviations occur at the same time, the corresponding allowable values will be halved respectively.
4. Axial misalignment not only occurs when assembling to the device, but also occurs due to vibration, thermal expansion, bearing wear, etc. during operation. Therefore, it is recommended to set the axis deviation to less than 1/3 of theallowable value.

: 30; 45; 60

Part Number
E-LMCPSW26-[5,6,6.35,7,8,9,9.525,10,11,12,14]-[5,6,6.35,7,8,9,9.525,10,11,12,14]
E-LMCPSW32-[5,6,6.35,8,9,9.525,10,11,12,12.7,14,15]-[5,6,6.35,8,9,9.525,10,11,12,12.7,14,15]
E-LMCPSW34-[5,6,6.35,8,9,9.525,10,11,12,12.7,14,15,16]-[5,6,6.35,8,9,9.525,10,11,12,12.7,14,15,16]
E-LMCPSW39-[8,9,9.525,10,11,12,12.7,14,15,16,17,18]-[8,9,9.525,10,11,12,12.7,14,15,16,17,18]
E-LMCPSW44-[8,9,9.525,10,11,12,12.7,14,15,16,17,18,19,20]-[8,9,9.525,10,11,12,12.7,14,15,16,17,18,19,20]

Price	Minimum Order Qty.	Days to Ship	RoHS	Shaft Bore Dia.1 d1 (or d) (Ø)	Shaft Bore Dia. 2 d2 (or d) (Ø)	O.D. (Ø)	Overall Length (mm)	Allowable Torque (N•m)	Allowable Lateral Misalignment (mm)	Allowable Axial Misalignment (mm)	Moment of Inertia (kg･m²)
-	1 Piece(s)	11 Day(s)	10	5 ～ 14	5 ～ 14	26	35	1.5	0.15	±0.30	2.8×10^-6
-	1 Piece(s)	11 Day(s)	10	5 ～ 15	5 ～ 15	32	41	2	0.17	±0.36	7.6×10^-6
-	1 Piece(s)	11 Day(s)	10	5 ～ 16	5 ～ 16	34	45	3	0.17	±0.36	9.0×10^-6
-	1 Piece(s)	16 Day(s)	10	8 ～ 18	8 ～ 18	39	50	6	0.22	±0.45	2.7×10^-5
-	1 Piece(s)	11 Day(s)	10	8 ～ 20	8 ～ 20	44	50	9	0.22	±0.54	4.2×10^-5

Basic Information

Series Name	Disc	Application	For Servo Motors / Stepping Motor	Features	High Torsional Rigidity / High Torque Type
Allowable Misalignment	Angular Misalignment / Eccentricity / Axial Misalignment	Body Material	Aluminum Alloy	Allowable Angular Misalignment(deg)	1.5
Product Category	Coupling Main Body	Max. Rotational Speed(r/min)	10000	Disc Material	Stainless Steel
Single/Double	Double Disc	Shaft Tightening Method	Set Screw	Shaft Hole Shape	Standard

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently asked question (FAQ)

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.
Question: Which disc type coupling is better, single disc type or double disc type?: Answer: Double disc type can absorb angular misalignment and lateral misalignment, but the total length will increase.
Although the total length of the single disc type is short, it is only suitable for applications with narrow space because lateral misalignment is not allowed in the structure.
Special attention should be paid to centering during use.
Question: Abnormal sound or vibration occurs during use of disc type coupling.: Answer: When a servo motor is used, the frequency of the mechanical resonance suppression filter is set as its inherent vibration frequency in the control system to suppress sound and vibration.
When using a stepping motor, the rotational speed can be finely adjusted, or the vibration can be absorbed and suppressed by the high damping rubber type coupling with obvious attenuation effect.
Question: How to achieve the effect of applicable lateral misalignment and angular misalignment in product design?: Answer: The plate spring formed by the slit allows lateral misalignment, angular misalignment and end play.
Question: What does the product need for applications of lateral misalignment and angular misalignment?: Answer: 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.

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