TM-391 - Williams - Torque Multipler with Planetary-gear Mechanism with Max Output 1200 ft lbs

The Williams TM‑391 Torque Multiplier is engineered for heavy‑duty industrial applications where high torque is required to loosen or tighten stubborn fasteners. Built with a precision planetary‑gear mechanism, it delivers smooth, efficient torque multiplication while maintaining durability and reliability in demanding environments.

With a maximum output of 1,200 ft‑lbs, the TM‑391 gives technicians the power they need using only a fraction of the input force—perfect for HVAC, industrial maintenance, mechanical repair, utilities, and field service.

Key Features

• Max Output: 1,200 ft‑lbs of torque for demanding fastening applications.
• Planetary‑Gear Mechanism: Provides smooth, efficient torque multiplication and longer tool life.
• Safe, Controlled Operation:
  • Input and output rotate in the same direction for predictable performance.
  • Reaction bar rotates opposite to the input and must rest securely against a rigid object to manage reaction forces.
• Service-Friendly Design:
  • Head assembly can be disassembled by removing four screws for cleaning and lubrication.
• High‑Efficiency Construction: Needle‑bearing design improves performance and reduces wear during high‑torque operation.
• Versatile Power Source Compatibility: Can be used with standard torque wrenches or air‑driven (non‑impact) tools.

This torque multiplier is ideal for technicians who need a compact, mechanical solution for high‑torque jobs without switching to hydraulic systems.