Maximum Torque Maximum Torque |
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Maximum Speed Maximum Speed |
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Overall Length Overall Length |
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OD OD |
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Torque-Limiting Mechanism Torque-Limiting Mechanism |
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Torque Adjustability Torque Adjustability |
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Torque-Limiting Direction Torque-Limiting Direction |
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Shaft Mount Type Shaft Mount Type |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Minimum Torque Minimum Torque |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Air-Powered Torque-Limiting Shaft-to-Gear Couplings


Often used in automated systems, these couplings are both air actuated and remotely adjustable, so you can adjust the torque setting even during operation. In the event of excess torque, they slip to protect motors and drivetrains, and then resume driving once the load has been reduced.
For technical drawings and 3-D models, click on a part number.
Keyway | Air Inlet | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Max. Torque | Max. Pressure, psi | Max. Speed | OD | Overall Lg. | Wd. | Dp. | Torque-Limiting Direction | Thread Size | Thread Type | Gender | Mounting Hole Thread Size | Each | |
For Round Shafts | ||||||||||||||
1/4" | 20 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/4" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 4-40 | 0000000 | 0000000 |
3/8" | 50 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/2" | 3 3/8" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 6-32 | 0000000 | 000000 |
1/2" | 100 in.-lbs. @ 100 psi | 100 | Not Rated | 2" | 3 5/8" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 6-32 | 0000000 | 000000 |
5/8" | 300 in.-lbs. @ 100 psi | 100 | Not Rated | 2 3/4" | 3 5/8" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 8-32 | 0000000 | 000000 |
For Keyed Shafts | ||||||||||||||
1/4" | 20 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/4" | 2 1/2" | 1/16" | 1/32" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 4-40 | 0000000 | 000000 |
3/8" | 50 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/2" | 3 3/8" | 3/32" | 3/64" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 6-32 | 0000000 | 000000 |
1/2" | 100 in.-lbs. @ 100 psi | 100 | Not Rated | 2" | 3 5/8" | 1/8" | 1/16" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 6-32 | 0000000 | 000000 |
5/8" | 300 in.-lbs. @ 100 psi | 100 | Not Rated | 2 3/4" | 3 5/8" | 3/16" | 3/32" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 8-32 | 0000000 | 000000 |
Torque-Limiting Shaft-to-Gear Couplings


Adjust your system's torque limit by hand. In the event of excess torque, these couplings slip to protect motors and drivetrains, and then resume driving once the load has been reduced. You can adjust the torque level without removing them from your shaft.
For technical drawings and 3-D models, click on a part number.
Keyway | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Max. Torque | Max. Speed, rpm | OD | Overall Lg. | Wd. | Dp. | Torque-Limiting Direction | Mounting Hole Thread Size | Each | |
For Round Shafts | ||||||||||
1/4" | 16 in.-lbs. @ 50 rpm | 50 | 1" | 1 1/2" | __ | __ | Clockwise and Counterclockwise | 4-40 | 0000000 | 0000000 |
3/8" | 16 in.-lbs. @ 50 rpm | 50 | 1" | 1 1/2" | __ | __ | Clockwise and Counterclockwise | 4-40 | 0000000 | 000000 |
3/8" | 25 in.-lbs. @ 50 rpm | 50 | 1 3/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 6-32 | 0000000 | 000000 |
1/2" | 25 in.-lbs. @ 50 rpm | 50 | 1 3/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 6-32 | 0000000 | 000000 |
1/2" | 50 in.-lbs. @ 50 rpm | 50 | 1 5/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 6-32 | 0000000 | 000000 |
1/2" | 75 in.-lbs. @ 50 rpm | 50 | 2 1/4" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 8-32 | 0000000 | 000000 |
5/8" | 50 in.-lbs. @ 50 rpm | 50 | 1 5/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 6-32 | 0000000 | 000000 |
5/8" | 75 in.-lbs. @ 50 rpm | 50 | 2 1/4" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 8-32 | 0000000 | 000000 |
For Keyed Shafts | ||||||||||
1/4" | 16 in.-lbs. @ 50 rpm | 50 | 1" | 1 1/2" | 1/16" | 1/32" | Clockwise and Counterclockwise | 4-40 | 0000000 | 000000 |
3/8" | 25 in.-lbs. @ 50 rpm | 50 | 1 3/8" | 2 1/2" | 3/32" | 3/64" | Clockwise and Counterclockwise | 6-32 | 0000000 | 000000 |
1/2" | 50 in.-lbs. @ 50 rpm | 50 | 1 5/8" | 2 1/2" | 1/8" | 1/16" | Clockwise and Counterclockwise | 6-32 | 0000000 | 000000 |
1/2" | 75 in.-lbs. @ 50 rpm | 50 | 2 1/4" | 2 1/2" | 1/8" | 1/16" | Clockwise and Counterclockwise | 8-32 | 0000000 | 000000 |
Magnetic Torque-Limiting Shaft-to-Gear Couplings

Also known as hysteresis clutches, these couplings use magnetic force to brake, control tension, and prevent torque overload. They have few moving parts, so they last longer than mechanical couplings. Twist the adjustment ring to set the torque within the range listed, then lock the ring in place with the included set screw.
For technical drawings and 3-D models, click on a part number.
Torque, in.-lbs | Mounting Hole | |||||||||
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Min. | Max. | Max. Speed, rpm | OD | Overall Lg. | Torque-Limiting Direction | Thread Size | Thread Pitch, mm | For Shaft Dia. | Each | |
0.06 | 1.25 | 880 | 1 15/16" | 1 5/8" | Clockwise and Counterclockwise | M4 | 0.7 | 1/4" | 000000 | 0000000 |
0.18 | 5 | 300 | 2 3/4" | 2 7/16" | Clockwise and Counterclockwise | M4 | 0.7 | 3/8" | 000000 | 000000 |
0.5 | 10.6 | 220 | 3 5/16" | 2 1/2" | Clockwise and Counterclockwise | M5 | 0.8 | 000000 | 000000 | |
1 | 25 | 250 | 4 11/16" | 3 1/8" | Clockwise and Counterclockwise | M5 | 0.8 | 000000 | 000000 | |
2 | 50 | 200 | 5 1/4" | 3 1/8" | Clockwise and Counterclockwise | M5 | 0.8 | 000000 | 000000 | |
3 | 70 | 200 | 6 5/16" | 4 1/8" | Clockwise and Counterclockwise | 1/4"-20 | __ | 000000 | 00000000 |
Magnetic Torque-Limiting Shaft-to-Gear Couplings with Shaft

Also known as hysteresis clutches, these couplings use magnetic force to brake, control tension, and prevent torque overload. They have few moving parts, so they last longer than mechanical couplings. Twist the adjustment ring to set the torque within the range listed, then lock the ring in place with the included set screw.
For technical drawings and 3-D models, click on a part number.
Torque, in.-lbs. | Mounting Hole | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Shaft Dia. | Min. | Max. | Max. Speed, rpm | OD | Overall Lg. | Shaft Type | Torque-Limiting Direction | Thread Size | Thread Pitch, mm | Each | |
3/16" | 0.01 | 0.06 | 2,000 | 1" | 1 3/8" | D-Profile | Clockwise and Counterclockwise | M3 | 0.5 | 0000000 | 0000000 |
3/16" | 0.01 | 0.13 | 1,500 | 1" | 1 3/8" | D-Profile | Clockwise and Counterclockwise | M3 | 0.5 | 0000000 | 000000 |
5/16" | 0.03 | 0.44 | 1,050 | 1 7/16" | 1 3/4" | D-Profile | Clockwise and Counterclockwise | M3 | 0.5 | 0000000 | 000000 |
Electromagnetic Tensioning, Holding, and Stopping Shaft-to-Gear Couplings

Also known as electric hysteresis brakes, these couplings use magnetic force to create drag to slow or stop the motion of your drive system. Use them with a current-limiting transformer to adjust the electrical current, which controls the amount of torque applied.
For technical drawings and 3-D models, click on a part number.
Keyway | Mounting Hole | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Shaft Dia. | Max. Torque, in.-lbs. | Max. Speed, rpm | OD | Overall Lg. | Shaft Type | Wd. | Dp. | Torque-Limiting Direction | Electrical Connection Type | Wire Lead Lg. | Voltage | Thread Size | Thread Pitch, mm | Each | |
0.118" | 0.2 | 1,990 | 1 1/4" | 1 5/8" | Round | __ | __ | Clockwise and Counterclockwise | Hardwire | 18" | 24V DC | M2.5 | 0.45 | 0000000 | 0000000 |
0.197" | 0.8 | 1,200 | 1 13/16" | 2" | D-Profile | __ | __ | Clockwise and Counterclockwise | Hardwire | 18" | 24V DC | M2.5 | 0.45 | 0000000 | 000000 |
0.197" | 1.3 | 760 | 2" | 2 1/8" | D-Profile | __ | __ | Clockwise and Counterclockwise | Hardwire | 18" | 24V DC | M3 | 0.5 | 0000000 | 000000 |
0.276" | 3.5 | 570 | 2 3/8" | 3" | D-Profile | __ | __ | Clockwise and Counterclockwise | Hardwire | 18" | 24V DC | M4 | 0.7 | 0000000 | 000000 |
0.394" | 11 | 590 | 3 5/8" | 4" | D-Profile | __ | __ | Clockwise and Counterclockwise | Hardwire | 18" | 24V DC | M4 | 0.7 | 0000000 | 000000 |
0.472" | 19 | 500 | 4 7/16" | 4 7/8" | Keyed | 0.158" | 0.098" | Clockwise and Counterclockwise | Hardwire | 18" | 24V DC | M5 | 0.8 | 0000000 | 000000 |
0.590" | 32 | 420 | 5 7/16" | 5 1/8" | Keyed | 0.197" | 0.124" | Clockwise and Counterclockwise | Hardwire | 18" | 24V DC | M5 | 0.8 | 0000000 | 00000000 |
Electromagnetic Torque-Limiting Shaft-to-Gear Couplings

Use these with an overload sensor in an automated system to instantly disconnect power and prevent damage. Couplings also accelerate loads from zero to full speed in less than three milliseconds when the power is turned on.
Clockwise Torque-Limiting Direction | Counterclockwise Torque-Limiting Direction | ||||||||||
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For Shaft Dia. | Max. Torque, in.-lbs. | Max. Speed, rpm | OD | Overall Lg. | Electrical Connection Type | Wire Lead Lg. | Voltage | Each | Each | ||
1/4" | 30 | 1,400 | 1 1/4" | 1 1/8" | Hardwire | 15" | 24V DC | 0000000 | 000000 | 0000000 | 000000 |
5/16" | 30 | 1,400 | 1 1/4" | 1 1/8" | Hardwire | 15" | 24V DC | 0000000 | 00000 | 0000000 | 00000 |
3/8" | 75 | 1,400 | 1 3/4" | 1 1/2" | Hardwire | 18" | 24V DC | 0000000 | 000000 | 0000000 | 000000 |
1/2" | 75 | 1,400 | 1 3/4" | 1 1/2" | Hardwire | 18" | 24V DC | 0000000 | 000000 | 0000000 | 000000 |
Air-Powered Torque-Limiting Shaft Couplings


Often used in automated systems, these couplings are air actuated so you can adjust the torque during operation. In the event of excess torque, they slip to protect motors and drivetrains, and then resume driving once the load has been reduced. You can adjust the torque level without removing them from your shaft.
For technical drawings and 3-D models, click on a part number.
Keyway | Air Inlet | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Max. Torque | Max. Pressure, psi | Max. Speed | OD | Overall Lg. | Wd. | Dp. | Torque-Limiting Direction | Thread Size | Thread Type | Gender | Each | |
For Round Shafts | |||||||||||||
1/4" | 20 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/4" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 0000000 |
3/8" | 50 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/2" | 3 3/8" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 000000 |
1/2" | 100 in.-lbs. @ 100 psi | 100 | Not Rated | 2" | 3 5/8" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 000000 |
5/8" | 300 in.-lbs. @ 100 psi | 100 | Not Rated | 2 3/4" | 3 5/8" | __ | __ | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 000000 |
For Keyed Shafts | |||||||||||||
1/4" | 20 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/4" | 2 1/2" | 1/16" | 1/32" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 000000 |
3/8" | 50 in.-lbs. @ 100 psi | 100 | Not Rated | 1 1/2" | 3 3/8" | 3/32" | 3/64" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 000000 |
1/2" | 100 in.-lbs. @ 100 psi | 100 | Not Rated | 2" | 3 5/8" | 1/8" | 1/16" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 000000 |
5/8" | 300 in.-lbs. @ 100 psi | 100 | Not Rated | 2 3/4" | 3 5/8" | 3/16" | 3/32" | Clockwise and Counterclockwise | 10-32 | UNF | Female | 0000000 | 000000 |
Torque-Limiting Shaft Couplings


Adjust your system's torque limit by hand. In the event of excess torque, these couplings slip to protect motors and drivetrains, and then resume driving once the load has been reduced. You can adjust the torque level without removing them from your shaft.
For technical drawings and 3-D models, click on a part number.
Keyway | |||||||||
---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | Max. Torque | Max. Speed, rpm | OD | Overall Lg. | Wd. | Dp. | Torque-Limiting Direction | Each | |
For Round Shafts | |||||||||
1/4" | 16 in.-lbs. @ 50 rpm | 50 | 1" | 1 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 0000000 |
3/8" | 16 in.-lbs. @ 50 rpm | 50 | 1" | 1 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 000000 |
3/8" | 25 in.-lbs. @ 50 rpm | 50 | 1 3/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 000000 |
1/2" | 25 in.-lbs. @ 50 rpm | 50 | 1 3/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 000000 |
1/2" | 50 in.-lbs. @ 50 rpm | 50 | 1 5/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 000000 |
1/2" | 75 in.-lbs. @ 50 rpm | 50 | 2 1/4" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 000000 |
5/8" | 50 in.-lbs. @ 50 rpm | 50 | 1 5/8" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 000000 |
5/8" | 75 in.-lbs. @ 50 rpm | 50 | 2 1/4" | 2 1/2" | __ | __ | Clockwise and Counterclockwise | 0000000 | 000000 |
For Keyed Shafts | |||||||||
1/4" | 16 in.-lbs. @ 50 rpm | 50 | 1" | 1 1/2" | 1/16" | 1/32" | Clockwise and Counterclockwise | 0000000 | 000000 |
3/8" | 25 in.-lbs. @ 50 rpm | 50 | 1 3/8" | 2 1/2" | 3/32" | 3/64" | Clockwise and Counterclockwise | 0000000 | 000000 |
1/2" | 50 in.-lbs. @ 50 rpm | 50 | 1 5/8" | 2 1/2" | 1/8" | 1/16" | Clockwise and Counterclockwise | 0000000 | 000000 |
1/2" | 75 in.-lbs. @ 50 rpm | 50 | 2 1/4" | 2 1/2" | 1/8" | 1/16" | Clockwise and Counterclockwise | 0000000 | 000000 |