Alloy and Stainless Steel
Welded Couplings

UTAS API 671 Standard alloy steel coupling designs range from 6-inch overalldiameter to 22.5-inch overall diameter for use in light- to heavy-duty applications. The stainless steel option provides greater torque-carrying capability in the same diaphragm envelope.

Each standard coupling selection can be customized for your application.

1. Peak torque is 140% of the rated torque. Couplings subjected to transient conditions should be evaluated using the peak torque. Limit torque is 165% of the rated torque. Couplings subjected to a “one-time” momentary load should be evaluated using the limit torque.
2. Axial deflection is based on the rated torque listed.
3. Total parallel offset equals the value shown multiplied by the distance between flexures.
4. Total coupling weight was calculated using an 18 in. DBSE and two hubs at maximum bore diameter.

* Contact Collins Aerospace engineering for coupling selections requiring: higher speed, axial/angular misalignment or torque.