Oldham couplings / grub screw locking, feather key / 1 disc: CFK / body: aluminium

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Technical Drawing - Claw Couplings

Couplings/Oldham/Set Screw 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

*One set screw location for D6 and D8.
Operating Temperature: -40°C ~ 90°C
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 BoreKeywayed BoreMaterialAccessory
d1 (One Side)d2 (One Side)d1, d2 (Both Sides)HubSpacer
MCOMCOLKMCORKMCOWKEN 1.4301 Equiv. Sintered AlloyCarbon Reinforced ResinSet 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
MCO20-6-6
MCOLK20-8-12
MCOWK20-10-12

Alterations - Claw Couplings

Couplings/Oldham/Set Screw Type:Related Image

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
MCO26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCO26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-RDC[6-14/0.1]
MCO26-LDC[6-14/0.1]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCO26-LDC[6-14/0.1]-RDC[6-14/0.1]
MCOLK26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCOLK26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-RDC[6-14/0.1]
MCOLK26-LDC[6-14/0.1]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCOLK26-LDC[6-14/0.1]-RDC[6-14/0.1]
MCORK26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCORK26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-RDC[6-14/0.1]
MCORK26-LDC[6-14/0.1]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCORK26-LDC[6-14/0.1]-RDC[6-14/0.1]
MCOWK26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCOWK26-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]-RDC[6-14/0.1]
MCOWK26-LDC[6-14/0.1]-[6,​6.35,​7,​8,​9.53,​10,​11,​12,​14]
MCOWK26-LDC[6-14/0.1]-RDC[6-14/0.1]
Part NumberMinimum order quantityVolume Discount
Standard
Shipping Days
?
RoHSAllowable 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 Range
(mm)
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 105.01 to 10.006 ~ 146 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Standard Holes--
1 7 Days 105.01 to 10.006 ~ 14-2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Standard Holes-6 ~ 14
1 7 Days 105.01 to 10.00-6 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Standard Holes6 ~ 14-
1 7 Days 105.01 to 10.00--2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Standard Holes6 ~ 146 ~ 14
1 7 Days 105.01 to 10.006 ~ 146 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1 Side--
1 7 Days 105.01 to 10.006 ~ 14-2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1 Side-6 ~ 14
1 7 Days 105.01 to 10.00-6 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1 Side6 ~ 14-
1 7 Days 105.01 to 10.00--2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1 Side6 ~ 146 ~ 14
1 7 Days 105.01 to 10.006 ~ 146 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d2 Side--
1 7 Days 105.01 to 10.006 ~ 14-2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d2 Side-6 ~ 14
1 7 Days 105.01 to 10.00-6 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d2 Side6 ~ 14-
1 7 Days 105.01 to 10.00--2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d2 Side6 ~ 146 ~ 14
1 7 Days 105.01 to 10.006 ~ 146 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1/d2 Side--
1 7 Days 105.01 to 10.006 ~ 14-2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1/d2 Side-6 ~ 14
1 7 Days 105.01 to 10.00-6 ~ 142625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1/d2 Side6 ~ 14-
1 7 Days 105.01 to 10.00--2625.64,001 to 10,000665001.1 to 3.02+0.6/-0.66.2x10-6Hole with Keyway d1/d2 Side6 ~ 146 ~ 14

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Technical Drawing - Claw Couplings

Couplings/Oldham/Set Screw Type:Related Image
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Specification Tables - Claw Couplings

Part Numberd1, d2 Selection (d1≤d2)
Keywayed Bore Type is selectable for diameter 6 or larger
DD1d3LFSet ScrewUnit Price
TypeNo.MTightening Torque (N • m)MCOMCOLK
MCORK
MCOWK
MCO
MCOLK
MCORK
MCOWK
611.52                66.22.48.431.5M1.60.15 --
81 23               88.23.49.63.51.7 --
10  234              1010.24.410.23.71.8M20.3 --
12   345             1212.54.014.25.22.5M30.7 --
15    4566.3578         14.5155.0165.42.6   
17     566.3578         16.817.57.219.86.73.2M41.7   
20      66.35789.53101112     20218.221.473.4   
26      66.35789.5310111214    262712.025.694   
30         8 10 1214    303113.033126   
34           101112141516  343513.034135.5M54.0   
38           10 121415161820384116.040157   
Part NumberAllowable Torque (N • m)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)
TypeNo.
MCO
MCOLK
MCORK
MCOWK
60.330.39120001.5x10-8±0.251.5
80.50.4132.2x10-8±0.32.5
100.80.4213.6x10-8±0.324
1210.5441.6x10-7±0.358
151.60.890100003.5x10-7±0.4511
172.212507.8x10-7±0.5518
203.21.534080001.7x10-6±0.629
266242065006.2x10-665
30152120062002x10-5100
34162.5240060002.5x10-5155
38282.5350058008x10-5240
The allowable torque varies depending on temperature.P.1062

 

Alterations - Claw Couplings

Couplings/Oldham/Set Screw Type:Related Image

Basic information

Series Name Oldham Type Allowable Misalignment Angular Misalignment / Eccentricity / Axial Misalignment Application Standard
Features High Torque Type / Low Moment of Inertia Body Material EN 1.4301 Equiv. Sintered Alloy Category Coupling Main Body
Allowable Angular Misalignment(deg) 3 Buffer Part Material Carbon Reinforced Resin Operating Temperature(°C) -40::90

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.

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