Torq-Tender®
Mechanical Torque Limiters

Torq-Tenders are positive drive couplings which provide accurate overload protection in many mechanical power transmission systems.

When a jam-up or excess overload occurs,
Torq-Tenders disengage motor drives. Their effective, versatile design, proven through 25 years of use, protect your drive train, motor and entire system.

Benefits
• Dependability For Short And Long Term Savings.

Even after repeated overloads, Torq-Tenders continue to operate and protect. Once the overload is removed, Torq-Tenders automatically return to their original setting for continuing overload protection.
• Flexibility Of Application. You can install Torq-Tenders Just about anywhere: they perform dependably for years in dusty or oily atmospheres, in high humidity and in salt water. Special designs include stainless steel, plated and sealed models for unusual applications and use in the most adverse operating conditions
• Installation Is Fast And Easy. Installs as easily as any simple coupling. Also has the advantage of handling up to 1.5 degrees mis- alignment and from .005" to .015" parallel misalignment.
• Bi-Directional And Uni-Directional Design. Torq-Tenders have the ability to: (A) Release at the same torque in each direction, (B) Release at a different torque in each direction, or (C) Be a positive drive in either direction.
• Tamper-Resistant Design Has Reset Capability. Once installed, torque ratings cannot be changed unless springs of a desired new rating are substituted. The change can be made easily and quickly. See page 5 for proper spring selection.

The Torq-Tender Product Line: 3 - 3000 in-lbs torque ratings
Self Supporting: Available in all models up to TT3
JF-Type Face Mount:Available in all models
J-Type Mount:Available in all models
Actuating Disc: Available in all models
Actuating Pin: Available in all models
H-TLC: Adjustable, corrosion resistant Torque Limiter

How Torq-Tenders Work
Steel springs within the unit force metal slides against each side of a hardened cast steel pawl, holding it rigid with one end seated in a detent on the outer drive housing.

During normal machine operation, power transfers into the central assembly through this pawl which rotates the outer drive housing and the driven shaft which is connected to the housing.

When load exceeds the rating determined by the precision tempered torque springs, excessive torque on the pawl overpowers the springs and the pawl rotates out of its detent. Thus, the central assembly is disconnected from the outer drive housing.

Once the overload is removed and speed reduced, the Torq-Tender resets itself automatically. This automatic resetting action engages the drive shaft and puts the entire drive system back into motion at its original angular position.

Torq-Tenders are also available with precisely located multiple rengagement points.

 

The right to make engineering refinements on all products is reserved.
Dimensions and other details subject to change.
When dimensions are critical, detailed drawings should be obtained from the factory.

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