3M 7000045672 Disc Backing Pad Psa 5/16-24 7500 Rpm

Product Description

The 3M 7000045672 is a PSA (pressure-sensitive adhesive) disc backing pad designed to hold sanding and finishing discs securely during rotary grinding and surface preparation work. The pad features a 5/16-24 male thread mount and a soft-density backing that conforms to the work surface, helping maintain consistent abrasive contact across flat and mildly contoured surfaces. Rated to 7,500 RPM, it is suited for use with angle grinders, die grinders, and random orbital tools in fabrication, welding prep, and finishing applications. Installation and disc changes require no fasteners beyond the threaded spindle connection, keeping tool changeover fast.

This backing pad is used in metal fabrication shops, mechanical service bays, and construction environments where PSA-backed abrasive discs are the standard consumable. The soft density construction is appropriate for light contouring work and surface finishing passes where a rigid pad would cause uneven abrasive wear. It is commonly used by machinists, pipefitters, ironworkers, and general maintenance trades that rely on angle grinders or finishing grinders for weld cleanup, deburring, and surface conditioning.

Key Features

• PSA adhesive interface secures pressure-sensitive abrasive discs without mechanical fasteners
• 5/16-24 male thread fits standard grinder and die grinder spindles
• 7,500 RPM maximum speed rating for safe use with high-speed rotary tools
• Soft density backing conforms to surface contours for consistent abrasive contact
• Sold individually, compatible with standard PSA disc consumables

Compatibility

Designed as an OEM-style replacement backing pad for rotary grinders and finishing tools that accept PSA abrasive discs with a 5/16-24 threaded spindle mount.

Installation Notes

Installation is performed by threading the pad clockwise onto the tool spindle until snug — do not overtighten. Always power down and disconnect or de-energize the grinder before mounting or removing the backing pad. Verify that the tool spindle speed does not exceed the 7,500 RPM rating of the pad before operation. Inspect the pad surface for debris or adhesive buildup that could cause disc misalignment before attaching a new abrasive disc.