Zero-Max Overload Safety Couplings


Zero-Max Torq-Tender overload safety couplings protect critical rotating power transmission components from torque overloads. Torq-Tenders serve both as a safety device and as a coupling in a power transmission system. Protecting motor and drive systems from jam-ups and excessive overloading, Torq-Tenders are extremely effective. They can be manufactured for systems requiring frequent washdowns. With the addition of an O-ring seal and simple housing modifications, the couplings resist contamination and are easily washed.

Simplicity of operation is an important Torq-Tender benefit. When a power transmission system’s load exceeds the preset precision-tempered torque spring rating, the drive mechanism pivots out of an engagement slot, disengaging the prime mover from the load providing overload protection. When the overload is removed and the speed is reduced, it resets itself automatically. The single position re-engagement point maintains equipment timing and positioning.

Available in torque ranges from 2 to 3000 in-lbs., Torq-Tenders provide tamper proof preset torque settings. The precision torque settings do not require costly and potentially risky calibration procedures. As a coupling it can handle up to 1.5 degrees of angular misalignment and a maximum parallel misalignment of 0.005 to 0.015 inch. “Torq-Tender couplings are an inexpensive way to protect expensive complex drive systems from torque overloads,” says Kevin Wells, regional sales manager. “Torq-Tender couplings provide a dual function as a coupling and an overload safety device. They provide overload protection for paper converting, packaging, printing, and PCB fabrication systems.”

Torq-Tenders are available in many standard sizes. From the smallest, TT1X (torque ranges 2 to 60 in-lbs) to the largest TT4X (torque ranges 750 to 3000 in-lbs), there are many precision preset factory torque ratings available. Additional Torq-Tender designs for a variety of mounting configurations are detailed in a new catalog. For more information call (800) 533-1731, e-mail, or go to