Protect your machinery if there is a jam, emergency stop, or other overload by cutting off torque between shafts when a maximum torque is reached. These torque limiters automatically resume transmitting torque once it drops below the set maximum. They should not be used in applications that frequently exceed the maximum torque. Since they come factory-set to a maximum torque, there’s no adjustment required and no risk of unintended changes to the torque setting.

They act as a flexible shaft coupling, so they reduce vibration and protect components from wear by compensating for angular and parallel misalignment. Fasten to your shafts by tightening the set screws, which bite into each shaft to hold it.

Sensor rings help you detect an overload by moving only when the limiter is transmitting torque. Use a sensor (not included) to trigger an alarm or shut down when the ring stops moving.

For technical drawings and 3-D models, click on a part number.

With rugged roller chains, these torque limiters handle more torque than other torque limiters. They have a disc that creates friction to prevent torque overload, control tension, and brake. If there’s too much torque, they’ll slip and only transmit the set torque. For example, they could be used in a machine that tightens a bottle cap to a certain torque without overtightening and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance. You can adjust the torque by rotating the hex nut on the hub.

They act as a flexible shaft coupling, so they reduce vibration and protect components from wear by compensating for angular and parallel misalignment. Fasten them to your shafts by tightening the set screws, which bite into each shaft to hold it.

Single-spring torque limiters let you make finer torque adjustments than double-spring torque limiters but can only withstand half as much torque.

Double-spring torque limiters handle twice as much torque as single-spring torque limiters but are not the best for making precise adjustments at low torques.

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Use your air system to remotely make changes to the torque setting or cut off torque completely, even during operation. Adjust the torque setting by adjusting the air pressure—the higher the pressure, the higher the set torque. When these torque limiters exceed their set torque, they’ll slip but still transmit the set torque. They use friction to prevent torque overload, control tension, and brake. They’re often used in automated systems. For instance, they can be used in a machine that tightens a bottle cap to a certain torque without overtightening it and breaking the bottle. Because they rely on friction, exposing them to moisture, oil, or lubricants can affect their performance.

Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.

Shaft-to-shaft torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.

Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.

For technical drawings and 3-D models, click on a part number.

Since they transfer torque in one direction and spin freely in the other, these clutches are useful in applications where you don’t want motion to reverse, such as in backstopping, indexing, and overrunning. For example, they can be used to prevent a conveyor from reversing direction. They’re through-shaft clutches, so they regulate torque transmission between a drive shaft and a mounted component such as a pulley, sprocket, or gear.

When choosing a clutch, consider how much torque you need to transfer. Roller clutches are best for low- to medium-torque transfer in overrunning and indexing applications. Sprag clutches handle higher torque than roller clutches because they have more contact points. This makes them best for backstopping applications.

You should also consider how the clutch will attach to your mounted component. Clutches with a keyed hub let you slip on your component.

Clutches that mount to shafts with set screws bite into your shaft when tightened to hold it. Clutches that mount to shafts with a slip fit must be secured with a shaft collar or in some other way that prevents them from moving along the length of your shaft.

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From one assembly, electrically control when to transmit power with a clutch and when to hold a load in place with a brake. The clutch and brake each have their own circuit, so they can be controlled separately. To disengage either one, remove power to its circuit. Disengaging the clutch disconnects the load from your motor, stopping power transmission without stopping your motor. Disengaging the brake releases it.

These clutch/brakes have a mounting pattern that is designed to mount directly to your NEMA face-mount motor. Fasten them to your motor's shaft by tightening the set screws, which bite into your shaft for a tight hold. To the other side, attach a gearbox or couple a gear, sprocket, pulley, or other component.

Controllers (sold separately) convert an AC input into two DC outputs that alternate engaging the clutch and the brake. If their green LED is lit, the clutch has power. If their red LED is lit, the brake has power. Mount these controllers inside a conduit box (sold separately).

Conduit boxes (sold separately) attach directly to these clutch/brakes to protect wiring from dust and moisture.

Covers (sold separately) change the open design of these clutch/brakes into a totally enclosed fan-cooled unit, protecting them from dust and moisture.

For technical drawings and 3-D models, click on a part number.

With zero backlash (no play), there’s no motion lost when these torque limiters transfer torque, so machines move smoothly with accurate and repeatable motion. They protect your machinery if there is a jam, emergency stop, or other overload by cutting off torque when a maximum torque is reached. They automatically resume transmitting torque once it drops below the set maximum. When they resume, they start transmitting torque from the same position where they stopped, keeping your drive and output sides in sync. They should not be used in applications that frequently exceed the set torque. You can adjust the set torque by using a spanner wrench to twist the adjustment ring.

To help you detect an overload, they have a sensor ring that moves out of place when these limiters cut off torque. Use a sensor (not included) to trigger an alarm or a shutdown when the ring moves.

They clamp evenly around your shaft for more holding power than set screws and won't damage your shaft.

Shaft-to-shaft torque limiters also act as a flexible shaft coupling, so they compensate for angular and parallel misalignment as they regulate torque transmission between shafts. This reduces vibration and protects components from wear. For a complete unit, you’ll need a torque limiter, a hub, and a spider (all sold separately).

Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.

For technical drawings and 3-D models, click on a part number.

Prevent corrosion from interfering with these torque limiters’ ability to protect your machinery if there’s a jam, emergency stop, or other overload. Made of nylon, they won’t rust or corrode from moisture, salt, and oil. They cut off torque when they reach the set maximum torque and automatically resume transmitting torque once it drops below the set maximum. They should not be used in applications that frequently exceed the set torque. You can adjust the set torque by tightening the hex head screw on the housing.

To help you detect an overload, these torque limiters have a sensor ring that moves out of place when these limiters cut off torque. Use a sensor (not included) to trigger an alarm or a shutdown when the ring moves.

Fasten them to your shaft by tightening the set screws, which bite into the shaft to hold it.

Shaft-to-shaft torque limiters also act as a shaft coupling, allowing you to regulate torque transmission between two shafts.

Through-shaft torque limiters regulate torque transmission between an input shaft and a mounted component, such as a pulley, sprocket, or gear.

Spring kits let you change the torque range on your torque limiter.

For technical drawings and 3-D models, click on a part number.

Designed to mount directly to a NEMA face-mount motor, these clutches let you electrically control when to transmit power without turning off your motor. When you remove power to these clutches, they stop power transmission by disconnecting your motor's load. Fasten them to your motor's shaft using the set screws, which bite into the shaft for a tight hold. To the other side, attach a gearbox or couple a gear, sprocket, pulley, or other component.

Controllers (sold separately) convert an AC input into a DC output to engage and disengage these clutches. They mount inside a conduit box (sold separately).

Conduit boxes (sold separately) attach directly to these clutches to protect wiring from dust and moisture.

Covers (sold separately) change the open design of these clutches into a totally enclosed fan-cooled unit, protecting them from dust and moisture.

For technical drawings and 3-D models, click on a part number.

Prevent damage from overloading. When overloaded, these limiters cause your sprocket or pulley to slip. Once the overload is removed, the limiters automatically reset. Set the torque within the range listed. Friction discs are between the hub and pressure plate.

Double-spring limiters have a second spring for handling nearly twice the torque of single-spring limiters.

Optional sprockets are designed specifically to fit their corresponding limiters. These hubless sprockets are not interchangeable.

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The needles in these bearings roll freely in one direction, but lock to transmit torque when the rotation of the shaft is reversed. Also known as drawn-cup roller clutches. An arrow on the lip indicates the rotational direction that locks the bearings.

Single-row bearings do not support loads from any direction. To support radial loads, use with our Needle-Roller Bearings.

Triple-row bearings support radial loads.

Bearings with 301 stainless steel springs handle higher temperatures than bearings with acetal springs.

For technical drawings and 3-D models, click on a part number.