Tru-maxx TRU-RS403M Disc Backing Pad 4 in Quick-change S

Product Description

The TRU-MAXX TRU-RS403M is a 4-inch diameter disc backing pad designed for quick-change Type S abrasive disc systems. It accepts a 1/4-20 male thread on a 1/4-inch shank and is rated to a maximum of 10,000 RPM. The medium-density pad construction provides consistent support across the abrasive disc face, reducing uneven wear and helping maintain a controlled cut. This backing pad is installed by metalworkers, fabricators, maintenance technicians, and industrial tradespeople who use angle grinders or die grinders for surface prep, weld blending, and deburring operations.

This backing pad is suited for use with Quick-Lok compatible quick-change abrasive discs in light fabrication, metal finishing, and general maintenance applications. It fits standard die grinders and right-angle grinders accepting a 1/4-inch shank. The quick-change Type S interface allows rapid disc swaps without additional tooling, making it practical in production or field environments where multiple abrasive types are rotated during a single job.

Key Features

• 4-inch pad diameter provides full backing support for standard quick-change discs
• Quick-change Type S interface with Quick-Lok compatibility for tool-free disc changes
• 1/4-20 male thread on a 1/4-inch shank fits common die grinders and right-angle grinders
• 10,000 RPM maximum speed rating suits typical pneumatic and electric grinder operating ranges
• Medium density backing maintains disc flatness during surface prep and weld blending

Compatibility

Designed for use with Quick-Lok compatible quick-change Type S abrasive discs on die grinders or right-angle grinders fitted with a 1/4-inch collet or chuck.

Installation Notes

Installation is performed by metalworkers or maintenance technicians using standard hand tools. Before mounting or removing the backing pad, ensure the grinder is fully powered down, unplugged, or the air supply is disconnected. Thread the 1/4-20 male shank into the grinder collet and tighten per the grinder manufacturer guidelines. Never operate above the 10,000 RPM maximum speed rating marked on the pad.