Oldham couplings / hub clamping, feather key / 1 disc: aluminium bronze / body: stainless steel (Part Numbers - CAD Download)

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Back to the Category Shaft Couplings

Technical Drawing - Claw Couplings

Couplings/High Rigidity/Oldham/Clamping Type:Related Image

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Available dimensions and tolerances can be found under the tab More information.

Basic Properties (e.g., material, hardness, coating, tolerance) - Claw Couplings

Tolerances for d1 and d2 are values before slit machining.
The lateral, angular, and axial misalignment values shown are for each occurring individually. When multiple misalignments are occurring simultaneously, the allowable maximum value of each will be reduced to 1/2.
For the selection criteria and alignment procedures, see >> P.1061

Standard Bore	Keywayed Bore			Material		Accessory
Standard Bore	d₁ (One Side)	d₂ (One Side)	d₁, d₂ (Both Sides)	Hub	Spacer	Accessory
MCOCG	MCOCGLK	MCOCGRK	MCOCGWK	EN 1.4301 Equiv. Sintered Alloy	Aluminum Bronze (Sold Lubricant Embedded)	Hex Socket Head Cap Screw

Further specifications can be found under the tab More information.

Composition of a Product Code - Claw Couplings

Part Number	-	Shaft Bore Dia. d₁	-	Shaft Bore Dia. d₂
MCOCG20	-	6	-	6
MCOCGLK30	-	8	-	12
MCOCGWK38	-	10	-	12

Alterations - Claw Couplings

General Information - Claw Couplings

Shaft coupling - compensation coupling - Oldham coupling - slit coupling - chain coupling - disc coupling - bellow coupling - product assortment

Shaft Coupling Selection Details

- Material: aluminum, aluminum alloy, steel, stainless steel, plastic

- Coupling buffer material: polyacetal, polyurethane, nylon, aluminum bronze, carbon fibre reinforced polymer (CFRP)

- Disc material: stainless steel, polyimide, carbon fibre (carbon)

- Fastening: hub clamping, half shell clamping, threaded pin clamping, clamping sleeve, keyway

- Design: slit coupling, disc coupling (servo coupling), Oldham coupling, dog coupling, jaw coupling, bellow coupling, metal bellow coupling, elastomer coupling

- ISO tolerances: H8

- Shaft diameter: 1 to 45 mm

- Outer diameter: 6 to 95 mm

- Length: 8.4 to 100 mm

- Offset: angle offset, radial offset, axial offset

Design Overview

Description/Basics

A shaft coupling, also called a compensating coupling, is generally used for the transmission of torque for mechanical engineering. Flexible shaft couplings (non-rigid) can compensate for lateral, axial and angular offsets (misalignment). Therefore, these are common connecting elements between motors and axles/shafts or even ball screws.

There are various types of designs, such as the jaw couplings, disc couplings (servo couplings), slit couplings, bellow couplings, Oldham couplings and many others, which are selected depending on the type of misalignment. You can determine which design is the right one for transmission in your application with the Coupling Selection Method available as a PDF.

When the shaft coupling is professionally installed, the transmission of rotational forces should be slip-free. To do this, the appropriate shaft coupling must be selected depending on the application. Here, it is important to observe the degree of misalignment, the maximum speed of rotation and the permissible torque of the compensation coupling and not to exceed these values during operation. If several misalignments occur at the same time, it is recommended to reduce the maximum value of the specified misalignment by approximately half.

The most commonly used elastomer coupling is the jaw coupling, which consists of a plastic buffer with damping properties. As a result, shocks and vibrations in a drive system can be damped, which protects adjacent components in the transmission of force. Our product range offers you alternative materials for the elastomers. These include among others aluminum bronze and carbon fibre-reinforced plastic.

The different shaft connections on the compensation couplings allow various connection variants for assembly. For this purpose, hub clamping, half shell clamping, slot clamping, threaded pin clamping, chip sleeve and keyways are available.
If a keyway is selected for a MISUMI shaft coupling, it is recommended obtaining the MISUMI machine key, as it is best to combine these.

A shaft coupling can be used for precise positioning. These are often combined together with slide screws or ball screws. A disc clutch (servo coupling) is suitable for this application, since it has a high torsional rigidity.

In addition to the standardized diameter of the shaft bore, MISUMI offers the option LDC and RDC, which allows the drill diameter to be adjusted to the shaft end in 0.1 mm increments.

Application Examples - Claw Couplings

Application example: shaft coupling - disc coupling with servo motor - disc coupling with ball screw drive - shaft clutch with servo motor - shaft clutch with ball screw drive

Shaft coupling with servo motor and ball screw
(1) Servo motor, (2) disc coupling (servo coupling), (3) ball screw

Application example: shaft coupling with encoder - shaft coupling with bearing housing - slit coupling with encoder - slit coupling with bearing housing -

Slit coupling with encoder
(1) Bearing with housing, (2) shaft coupling, (3) motor, (4) axles/shafts

Application example - Performance test stand with shaft coupling - Oldham coupling with engine - test stand with Oldham coupling

Engine test stand with Oldham coupling
(1) X-axis positioning stage, (2) performance test station, (3) shaft coupling, (4) brackets, L-shaped

Application example: synchronous pulley with shaft coupling - shaft coupling with motor and gearbox

Shaft coupling with motor and gearbox
(1) Motor, (2) Shaft coupling, (3) Conversion/Reducing gears, (4) Timing pulleys / Idlers

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Part Number
MCOCGRK26-LDC[6-12/0.1]-[6,6.35,7,8,9.53,10,11,12]
MCOCGRK26-LDC[6-12/0.1]-RDC[6-12/0.1]
MCOCGRK30-[8,10,12,14]-[8,10,12,14]
MCOCGRK30-[8,10,12,14]-RDC[8.1-14/0.1]
MCOCGRK30-LDC[8.1-14/0.1]-[8,10,12,14]
MCOCGRK30-LDC[8.1-14/0.1]-RDC[8.1-14/0.1]
MCOCGRK34-[10,11,12,14,15,16]-[10,11,12,14,15,16]
MCOCGRK34-[10,11,12,14,15,16]-RDC[8-16/0.1]
MCOCGRK34-LDC[8-16/0.1]-[10,11,12,14,15,16]
MCOCGRK34-LDC[8-16/0.1]-RDC[8-16/0.1]
MCOCGRK38-[10,12,14,15,16,18,20]-[10,12,14,15,16,18,20]
MCOCGRK38-[10,12,14,15,16,18,20]-RDC[10-20/0.1]
MCOCGRK38-LDC[10-20/0.1]-[10,12,14,15,16,18,20]
MCOCGRK38-LDC[10-20/0.1]-RDC[10-20/0.1]
MCOCGWK15-6-6
MCOCGWK17-[6,6.35]-[6,6.35]
MCOCGWK20-[6,6.35,7,8,9.53,10]-[6,6.35,7,8,9.53,10]
MCOCGWK20-[6,6.35,7,8,9.53,10]-RDC[6-10/0.1]
MCOCGWK20-LDC[6-10/0.1]-[6,6.35,7,8,9.53,10]
MCOCGWK20-LDC[6-10/0.1]-RDC[6-10/0.1]
MCOCGWK26-[6,6.35,7,8,9.53,10,11,12]-[6,6.35,7,8,9.53,10,11,12]
MCOCGWK26-[6,6.35,7,8,9.53,10,11,12]-RDC[6-12/0.1]
MCOCGWK26-LDC[6-12/0.1]-[6,6.35,7,8,9.53,10,11,12]
MCOCGWK26-LDC[6-12/0.1]-RDC[6-12/0.1]
MCOCGWK30-[8,10,12,14]-[8,10,12,14]
MCOCGWK30-[8,10,12,14]-RDC[8-14/0.1]
MCOCGWK30-LDC[8-14/0.1]-[8,10,12,14]
MCOCGWK30-LDC[8-14/0.1]-RDC[8-14/0.1]
MCOCGWK34-[10,11,12,14,15,16]-[10,11,12,14,15,16]
MCOCGWK34-[10,11,12,14,15,16]-RDC[10-16/0.1]
MCOCGWK34-LDC[10-16/0.1]-[10,11,12,14,15,16]
MCOCGWK34-LDC[10-16/0.1]-RDC[10-16/0.1]
MCOCGWK38-[10,12,14,15,16,18,20]-[10,12,14,15,16,18,20]
MCOCGWK38-[10,12,14,15,16,18,20]-RDC[10-20/0.1]
MCOCGWK38-LDC[10-20/0.1]-[10,12,14,15,16,18,20]
MCOCGWK38-LDC[10-20/0.1]-RDC[10-20/0.1]

Standard Unit Price	Minimum order quantity	Standard Shipping Days ?	RoHS	Allowable Torque Range (N•m)	Shaft Bore Dia. 1 d1 (or d) (mm)	Shaft Bore Dia. 2 d2 (or d) (mm)	O.D. D (mm)	Overall Length (mm)	Max. Rotational Speed Range (r/min)	Allowable Torque (Nm)	Max. Rotational Speed (r/min)	Allowable Lateral Misalignment (mm)	Allowable Axial Misalignment (mm)	Moment of Inertia (kg･m²)	Shaft Bore Shape	Shaft I.D. d1 Change Hole Dia. [LDC] Specified in 0.1mm Increment	Shaft I.D. d2 Change Hole Dia. [RDC] Specified in 0.1mm Increment
-	1	7 Days	10	5.01 to 10.00	-	6 ～ 12	26	30.4	4,001 to 10,000	10	5000	0.8	+0.2/-0.2	1x10^-5	Hole with Keyway d2 Side	6 ～ 12	-
-	1	7 Days	10	5.01 to 10.00	-	-	26	30.4	4,001 to 10,000	10	5000	0.8	+0.2/-0.2	1x10^-5	Hole with Keyway d2 Side	6 ～ 12	6 ～ 12
-	1	7 Days	10	20.01 to 50.00	8 ～ 14	8 ～ 14	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d2 Side	-	-
-	1	7 Days	10	20.01 to 50.00	8 ～ 14	-	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d2 Side	-	8.1 ～ 14
-	1	7 Days	10	20.01 to 50.00	-	8 ～ 14	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d2 Side	8.1 ～ 14	-
-	1	7 Days	10	20.01 to 50.00	-	-	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d2 Side	8.1 ～ 14	8.1 ～ 14
-	1	7 Days	10	20.01 to 50.00	10 ～ 16	10 ～ 16	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d2 Side	-	-
-	1	7 Days	10	20.01 to 50.00	10 ～ 16	-	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d2 Side	-	8 ～ 16
-	1	7 Days	10	20.01 to 50.00	-	10 ～ 16	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d2 Side	8 ～ 16	-
-	1	7 Days	10	20.01 to 50.00	-	-	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d2 Side	8 ～ 16	8 ～ 16
-	1	7 Days	10	20.01 to 50.00	10 ～ 20	10 ～ 20	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d2 Side	-	-
-	1	7 Days	10	20.01 to 50.00	10 ～ 20	-	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d2 Side	-	10 ～ 20
-	1	7 Days	10	20.01 to 50.00	-	10 ～ 20	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d2 Side	10 ～ 20	-
-	1	7 Days	10	20.01 to 50.00	-	-	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d2 Side	10 ～ 20	10 ～ 20
-	1	7 Days	10	1.01 to 3.00	6	6	14.5	18.4	4,001 to 10,000	3	8000	0.5	+0.1/-0.1	6x10^-7	Hole with Keyway d1/d2 Side	-	-
-	1	7 Days	10	3.01 to 5.00	6 ～ 6.35	6 ～ 6.35	16.8	24.4	4,001 to 10,000	5	7000	0.5	+0.1/-0.1	1.2x10^-6	Hole with Keyway d1/d2 Side	-	-
-	1	7 Days	10	5.01 to 10.00	6 ～ 10	6 ～ 10	20	27.2	4,001 to 10,000	7	6000	0.5	+0.1/-0.1	3x10^-6	Hole with Keyway d1/d2 Side	-	-
-	1	7 Days	10	5.01 to 10.00	6 ～ 10	-	20	27.2	4,001 to 10,000	7	6000	0.5	+0.1/-0.1	3x10^-6	Hole with Keyway d1/d2 Side	-	6 ～ 10
-	1	7 Days	10	5.01 to 10.00	-	6 ～ 10	20	27.2	4,001 to 10,000	7	6000	0.5	+0.1/-0.1	3x10^-6	Hole with Keyway d1/d2 Side	6 ～ 10	-
-	1	7 Days	10	5.01 to 10.00	-	-	20	27.2	4,001 to 10,000	7	6000	0.5	+0.1/-0.1	3x10^-6	Hole with Keyway d1/d2 Side	6 ～ 10	6 ～ 10
-	1	7 Days	10	5.01 to 10.00	6 ～ 12	6 ～ 12	26	30.4	4,001 to 10,000	10	5000	0.8	+0.2/-0.2	1x10^-5	Hole with Keyway d1/d2 Side	-	-
-	1	7 Days	10	5.01 to 10.00	6 ～ 12	-	26	30.4	4,001 to 10,000	10	5000	0.8	+0.2/-0.2	1x10^-5	Hole with Keyway d1/d2 Side	-	6 ～ 12
-	1	7 Days	10	5.01 to 10.00	-	6 ～ 12	26	30.4	4,001 to 10,000	10	5000	0.8	+0.2/-0.2	1x10^-5	Hole with Keyway d1/d2 Side	6 ～ 12	-
-	1	7 Days	10	5.01 to 10.00	-	-	26	30.4	4,001 to 10,000	10	5000	0.8	+0.2/-0.2	1x10^-5	Hole with Keyway d1/d2 Side	6 ～ 12	6 ～ 12
-	1	7 Days	10	20.01 to 50.00	8 ～ 14	8 ～ 14	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d1/d2 Side	-	-
-	1	7 Days	10	20.01 to 50.00	8 ～ 14	-	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d1/d2 Side	-	8 ～ 14
-	1	7 Days	10	20.01 to 50.00	-	8 ～ 14	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d1/d2 Side	8 ～ 14	-
-	1	7 Days	10	20.01 to 50.00	-	-	30	33	4,001 to 10,000	30	5000	1	+0.3/-0.3	2.5x10^-5	Hole with Keyway d1/d2 Side	8 ～ 14	8 ～ 14
-	1	7 Days	10	20.01 to 50.00	10 ～ 16	10 ～ 16	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d1/d2 Side	-	-
-	1	7 Days	10	20.01 to 50.00	10 ～ 16	-	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d1/d2 Side	-	10 ～ 16
-	1	7 Days	10	20.01 to 50.00	-	10 ～ 16	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d1/d2 Side	10 ～ 16	-
-	1	7 Days	10	20.01 to 50.00	-	-	34	34	2001 to 4,000	32	4000	1	+0.2/-0.2	4x10^-5	Hole with Keyway d1/d2 Side	10 ～ 16	10 ～ 16
-	1	7 Days	10	20.01 to 50.00	10 ～ 20	10 ～ 20	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d1/d2 Side	-	-
-	1	7 Days	10	20.01 to 50.00	10 ～ 20	-	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d1/d2 Side	-	10 ～ 20
-	1	7 Days	10	20.01 to 50.00	-	10 ～ 20	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d1/d2 Side	10 ～ 20	-
-	1	7 Days	10	20.01 to 50.00	-	-	38	39.5	2001 to 4,000	50	4000	1	+0.3/-0.3	1x10^-4	Hole with Keyway d1/d2 Side	10 ～ 20	10 ～ 20

Back to the Category Shaft Couplings

Technical Drawing - Claw Couplings

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Specification Tables - Claw Couplings

Part Number		d₁, d₂ Selection (d₁≤d₂) Keywayed Bore Type is selectable for diameter 6 or larger															D	D₁	D₂	d₃	L	ℓ	A	F	Clamp Screw		Unit Price
Type	No.																D	D₁	D₂	d₃	L	ℓ	A	F	M	Tightening Torque (N • m)	MCOCG	MCOCGLK MCOCGRK	MCOCGWK
MCOCG MCOCGLK MCOCGRK MCOCGWK	15	4	5	6													14.5	15	16	7.2	18.4	6.6	4.5	3.2	M2.5	1.0
	17		5	6	6.35												16.8	17.5	19	8.2	24.4	9	5	4	M3	1.8
	20			6	6.35	7	8	9.53	10								20	21	23	9	27.2	10	7	4.5	M3	1.8
	26			6	6.35	7	8	9.53	10	11	12						26	27	29	12	30.4	11.5	8.4	5	M4	3.0
	30						8		10								30	31	32	13	33	12	8.5	6	M5	8.0
	30										12	14					30	31	32	13	33	12	9		M4	4.5
	34								10	11	12	14	15	16			34	35	37	14	34	13	11		M5	8.0*
	38								10		12	14	15	16			38	41	41	17	39.5	15	11.5	7	M5	8.0
	38														18	20	38	41	41	17	39.5	15	13.7	7	M5	8.0

*Clamping screw tightening torque for shaft diameter 16mm (d1, d2) of MCOCG34 is 5.4 (N • m).

Part Number		Allowable Torque (N • m)	Allowable Angular Misalignment (°)	Lateral Misalignment (mm)	Static Torsional Spring Constant (N • m/rad)	Max. Rotational Speed (r/min)	Moment of Inertia (kg • m²)	Allowable Axial Misalignment (mm)	Mass (g)
Type	No.	Allowable Torque (N • m)	Allowable Angular Misalignment (°)	Lateral Misalignment (mm)	Static Torsional Spring Constant (N • m/rad)	Max. Rotational Speed (r/min)	Moment of Inertia (kg • m²)	Allowable Axial Misalignment (mm)	Mass (g)
MCOCG MCOCGLK MCOCGRK MCOCGWK	15	3	1.5	0.5	800	8000	6 x10^-7	±0.1	17
	17	5		0.5	1000	7000	1.2x10^-6	±0.1	30
	20	7		0.5	2200	6000	3 x10^-6	±0.1	48
	26	10		0.8	4000	5000	1 x10^-5	±0.2	90
	30	30		1	5500	5000	2.5x10^-5	±0.3	120
	34	32		1	8000	4000	4 x10^-5	±0.2	172
	38	50		1	11000	4000	1 x10^-4	±0.3	246

When lateral misalignment is more than 0.1, spacer wear will be in proportion to the amount of load torque, lateral misalignment, and the number of rotations.
Excellent in high torque / high speed rotation applications.

Alterations - Claw Couplings

Products homepage

Basic information

Series Name	Oldham Type	Allowable Misalignment	Angular Misalignment / Eccentricity / Axial Misalignment	Application	Standard
Features	High Torsional Rigidity / High Torque Type / Low Moment of Inertia	Body Material	EN 1.4301 Equiv. Sintered Alloy	Category	Coupling Main Body
Allowable Lateral Misalignment Range(mm)	0.41 to 1.0	Allowable Angular Misalignment(deg)	1.5	Buffer Part Material	Aluminum Bronze (Solid Lubricant Embedded)

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Basic Attributes

Allowable Torque Range(N•m)
1.01 to 3.00

3.01 to 5.00

5.01 to 10.00

20.01 to 50.00
Clear
Shaft Bore Dia. 1 d1 (or d)(mm)
4

5

6

6.35

7

8

9.53

10

11

12

14

15

16

18

20
Clear
Shaft Bore Dia. 2 d2 (or d)(mm)
4

5

6

6.35

7

8

9.53

10

11

12

14

15

16

18

20
Clear
O.D. D(mm)
14.5

16.8

20

26

30

34

38
Clear
Overall Length(mm)
18.4

24.4

27.2

30.4

33

34

39.5
Clear
Max. Rotational Speed Range(r/min)
2001 to 4,000

4,001 to 10,000
Clear
Allowable Torque(Nm)
3

5

7

10

30

32

50
Clear
Max. Rotational Speed(r/min)
4000

5000

6000

7000

8000
Clear
Allowable Lateral Misalignment(mm)
0.5

0.8

1
Clear
Shaft Bore Shape
Hole with Keyway d1 Side

Hole with Keyway d1/d2 Side

Hole with Keyway d2 Side

Standard Holes
Clear
Shaft I.D. d1 Change Hole Dia. [LDC] Specified in 0.1mm Increment
[4-20/0.1]
Clear
Shaft I.D. d2 Change Hole Dia. [RDC] Specified in 0.1mm Increment
[4-20/0.1]
Clear
Type
- MCOCG
- MCOCGLK
- MCOCGRK
- MCOCGWK
Clear
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Optional Attributes

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

Frequently Asked Questions (FAQ)

Question:
Can a claw coupling compensate for an angle?: Answer:
As a rule, a claw coupling can compensate for an angular offset. How large this angle may be depends on the respective claw coupling. Here, it is recommended to always refer to the technical information in the data sheet. If there are other misalignments, there is a possibility that the amount of the compensation will be reduced depending on the coupling type. There are notes on this for the shaft couplings.
Question:
Which coupling is suitable for a servo motor?: Answer:
A disc coupling can be used with a servo motor application. These have a good torsion rigidity, which is necessary for applications with alternating direction of rotation. These couplings are often used in positioning applications. Here, it is recommended to assume the peak torque of the servo motor and to use the compensation factor found on the product page as safety. The permissible torque of the shaft coupling should be higher than the determined value.
Question:
What temperature can an elastomeric clutch withstand?: Answer:
The temperatures that a claw coupling or Oldham coupling with elastomer buffer can withstand depend on the material used. The permissible temperature is noted for the respective product. However, when designing the shaft coupling, the temperature correction factor should be taken into account in the calculation. You can find it in the shaft coupling selection procedure as a PDF.
Question:
Which coupling compensates for a high angular offset?: Answer:
A metal bellow coupling can be a possible variant in the case of a high angle offset. This variant of a shaft coupling can compensate an angular offset of up to approx. 2°. This is made possible by the flexible bellow coupling.