Metric Shaft Couplings | McMaster-Carr

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System of Measurement

Shaft Diameter

6.000 mm to 10.000 mm

6.000 mm to 12.000 mm

6.000 mm to 16.000 mm

6.000 mm to 20.000 mm

7 mm

8 mm

9 mm

9.500 mm to 25.000 mm

9.500 mm to 30.000 mm

9.500 mm to 35.000 mm

Shaft Type

Construction

Material

Overall Length

Shaft Mount Type

For Shaft Misalignment Type

Keyway Width

Component

For Rotary Motion

Flexible Shaft Coupling Type

Keyway Depth

Length

Shaft Coupling Flexibility

Diameter

Flexible Shaft Coupling Trade Size

Maximum Rotation Speed

Number of Set Screws Included

Set Screw Material

Stainless Steel

Steel

RoHS

Compliant

Compliant with Exemptions

Not Compliant

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

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DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

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2,813 Products

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Flexible Shaft Couplings

Spider Couplings

A rubbery center fits between hubs to enable torque transfer and damp vibration

62 products

Precision Spider Couplings

Position shafts on motors, pumps, and other equipment that requires highly controlled movements

47 products

Precision Beam Couplings

Slits on the one-piece body flex to help transfer full torque and compensate for tiny misalignments

303 products

High-Torque Spider Couplings

A thicker split spider helps transmit higher torque than standard split spider couplings

20 products

High-Axial-Misalignment Sleeve Couplings

A gear-shaped sleeve helps withstand high axial misalignment and damp vibration

18 products

High-Parallel-Misalignment Slotted Disc Couplings

Handle parallel misalignment by allowing shafts to slide independently

39 products

Servomotor Precision Disc Couplings

Withstand high torque from starts, stops, and reversals in high-performance servomotor setups

115 products

Precision Bellows Couplings

A thin-walled, corrugated-metal center tube flexes to handle all types of misalignment

73 products

Sleeve Couplings

More lightweight than other sleeve couplings to reduce energy consumption

14 products

High-Angular-Misalignment Flex Disc Couplings

A flexible disc helps transfer torque smoothly in assemblies with tilting shafts

6 products

High-Parallel-and-Angular-Misalignment Precision Double Loop Couplings

Offset hubs compensate for high parallel and angular misalignment

72 products

Cleaned and Bagged Slotted Disc Couplings

Prevent contamination in electronics plants and other extra-clean environments

15 products

Electrically Isolating Servomotor Precision Disc Couplings

Block stray current so it doesn't erode or interfere with components on your shaft

9 products

Other Products

Rigid Shaft Couplings

Join two shafts that are aligned and handle higher torque than flexible shaft couplings

280 products

Shaft Collars

Hold and position parts on a shaft, or limit shaft movement

1,030 products

U-Joints

Transfer torque between shafts at an angle; handle more torque and misalignment than flexible shafts

18 products

Rod End Nuts

Attach to rods, pipe, and tubing to make pivot and hinge points

8 products

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

556 products

Rod Alignment Couplers

Reduce wear on bearings and seals by flexing when the cylinder and load aren't precisely even

32 products

Clutches

Start and stop the transmission of power to machinery

38 products

Rod End Seals

Keep dirt out and lubrication in to extend the life of rod ends

8 products

Threaded Rod Collars

Hold and position parts on a threaded rod

10 products

Rod End Inserts

Attach to rod ends to increase the amount of misalignment they can handle

5 products

Torque Limiters

Keep torque at or below a set limit to control tension or braking or protect machinery from overload

14 products

Joint Covers

Shield rotating joints to keep lubricants in and contaminants out

3 products

Driver Extension Adapters

Create a tool that’s as long as you need to reach deeply recessed fasteners

18 products