Williams Tools JHWTM-391RSD Replacement Square Drive

Product Description

The WILLIAMS TOOLS JHWTM-391RSD is a replacement square drive designed for use with planetary-gear and plate reaction torque multipliers. Square drives on torque multipliers transmit high rotational force to fasteners and are subject to wear over time, making field-replaceable drives a practical maintenance item for any shop or service truck. This part ships as a single unit and is finished in black. At 0.2 pounds, it is a compact, lightweight component that keeps torque multiplier assemblies operational without requiring full tool replacement.

This square drive is suited for professional trades that rely on torque multipliers for high-torque fastener work, including heavy equipment mechanics, industrial maintenance technicians, and fleet service professionals. Torque multipliers are common in applications where standard torque wrenches cannot generate sufficient output, such as large-diameter bolt work on trucks, machinery, and structural assemblies. The JHWTM-391RSD allows technicians to restore a worn or damaged drive end rather than replacing the entire multiplier unit.

Key Features

• Direct replacement square drive for planetary-gear and plate reaction torque multipliers
• Black finish for corrosion resistance and clean appearance
• Compact dimensions suited for tight-clearance installations
• Lightweight at 0.2 pounds for easy handling and storage
• Sold as a single unit for targeted replacement without excess inventory

Compatibility

Designed as a replacement square drive for Williams 391-series planetary-gear and plate reaction torque multipliers. Confirm drive size and series compatibility with your specific torque multiplier model before installation.

Installation Notes

Installation should be performed by a qualified mechanic or industrial technician familiar with torque multiplier disassembly and reassembly procedures. Ensure the torque multiplier is fully disengaged and no load is applied to the tool before removing or installing the square drive. Inspect the drive socket interface and retaining mechanism for wear before reinstalling. Follow the tool manufacturer's service documentation for proper fit and retention.