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

For Rotary Motion

Keyway Depth

Length

Component

Shaft Coupling Flexibility

Diameter

Maximum Torque

Less than 10,000 in·lbf

10,000 in·lbf to 19,999 in·lbf

20,000 in·lbf to 29,999 in·lbf

Not Rated

Number of Set Screws Included

Set Screw Material

Stainless Steel

Steel

Flexible Shaft Coupling Cut Style

Parallel

Spiral

RoHS

Compliant

Compliant with Exemptions

Not Compliant

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

Yes

REACH

Compliant

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

2,816 Products

Flexible Shaft Couplings

Set Screw Flexible Shaft Couplings

A set screw bites into your shaft to hold the coupling in place

53 products

High-Torque Set Screw Flexible Shaft Couplings

Take on twice as much torque as standard split spiders while a set screw holds hubs in place

20 products

Clamping High-Parallel-Misalignment Flexible Shaft Couplings

Grip misaligned shafts evenly for more holding power than set screw couplings

29 products

Set Screw High-Parallel-Misalignment Flexible Shaft Couplings

A set screw bites into misaligned shafts to hold the coupling in place

22 products

High-Angular-Misalignment Flexible Shaft Couplings

Withstand higher angular misalignment than other three-piece couplings

6 products

Cleaned and Bagged Flexible Shaft Couplings

Often used in electronics manufacturing facilities and other extra-clean environments

15 products

Metal-Detectable Flexible Shaft Couplings

Spider contains metal to trigger a detector if a piece breaks off, such as in food industry lines

9 products

Precision Flexible Shaft Couplings

Clamping Precision Flexible Shaft Couplings

Grip shafts evenly for more holding power than set screw couplings without marring the shaft

231 products

Clamping Vibration-Damping Precision Flexible Shaft Couplings

Grip shafts evenly in precision motor and pump applications

37 products

Set Screw Precision Flexible Shaft Couplings

A set screw bites into your shaft to hold the coupling in place

72 products

Set Screw Vibration-Damping Precision Flexible Shaft Couplings

A set screw bites into the shaft to hold the couplings in place in precision motors and pumps

28 products

Servomotor Precision Flexible Shaft Couplings

Handle high twisting forces as well as misalignment in high-performance servomotor applications

115 products

High-Speed Precision Flexible Shaft Couplings

Handle all types of misalignment and are good for encoder motion-control applications

73 products

High-Misalignment Vibration-Damping Precision Flexible Shaft Couplings

Reduce vibration and compensate for high shaft misalignment

72 products

Electrically Isolating Servomotor Precision Flexible Shaft Couplings

An acetal plastic spacer insulates shaft components from stray electric current

9 products

Flexible Shaft Couplings for Continuous Motion

High-Speed Vibration-Damping Flexible Shaft Couplings

Gear-shaped for high-speed and high-torque applications

18 products

Lightweight Flexible Shaft Couplings

Nylon sleeves reduce weight and lower energy consumption

14 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

Rod End Seals

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

8 products

Clutches

Start and stop the transmission of power to machinery

38 products

Rod End Inserts

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

5 products

Threaded Rod Collars

Hold and position parts on a threaded rod

10 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