Overload-Protection Spring-Loaded Torque Limiters
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.

Misalignment Capability | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia. | For Shaft Type | Max. Speed, rpm | Parallel | Angular | OD | Overall Lg. | Keyway Wd. × Keyway Dp. | Material | Center Material | Drive Direction | Re-Engagement Position | Choose a Max. Torque, in.-lbs. | Each | |
1/2" | Round | 1,800 | 0.031" | 6° | 3 1/2" | 3" | __ | 6061 Aluminum | Steel | Clockwise and Counterclockwise | Multiple Position | 0000000 | 000000 | |
5/8" | Keyed | 1,800 | 0.031" | 6° | 3 1/2" | 3" | 3/16" × 3/32" | 6061 Aluminum | Steel | Clockwise and Counterclockwise | Multiple Position | 0000000 | 00000 | |
3/4" | Keyed | 1,800 | 0.031" | 6° | 3 1/2" | 3" | 3/16" × 3/32" | 6061 Aluminum | Steel | Clockwise and Counterclockwise | Multiple Position | 0000000 | 00000 | |
7/8" | Keyed | 1,800 | 0.031" | 6° | 3 1/2" | 3" | 3/16" × 3/32" | 6061 Aluminum | Steel | Clockwise and Counterclockwise | Multiple Position | 0000000 | 00000 | |
1" | Keyed | 1,800 | 0.031" | 6° | 3 1/2" | 3" | 1/4" × 1/8" | 6061 Aluminum | Steel | Clockwise and Counterclockwise | Multiple Position | 0000000 | 00000 |

with Sensor
Ring Installed

Material | OD | Thickness | Each | |
Steel | 3 1/2" | 0.06" | 000000 | 000000 |