Norton 63642543422 Fiber Disc Backup Pad 7 in Medium Density

Product Description

The NORTON 63642543422 is an air-cooled fiber disc backup pad designed to support and drive resin-fiber abrasive discs during grinding and finishing operations. Built at 7 inches in diameter with a 5/8 inch-11 threaded hole, it mounts directly to standard angle grinders and disc grinders. The air-cooled design incorporates gaps throughout the pad body that allow airflow between the backing pad and the abrasive disc. This continuous airflow reduces heat buildup at the disc and workpiece surface, extending abrasive life and lowering the risk of heat damage on temperature-sensitive materials. The medium-density construction balances conformability with firm disc support across flat and moderately contoured surfaces. Installers and fabricators working with metal, masonry, or composite materials will find this backup pad suited to production and maintenance grinding tasks.

This backup pad is used in metal fabrication shops, construction sites, and maintenance environments where fiber discs are the primary abrasive format. It is compatible with angle grinders and right-angle disc grinders equipped with a 5/8 inch-11 spindle thread. The medium-density foam or fiber construction makes it appropriate for flat stock grinding, weld blending, and surface preparation work. It is typically selected when operators need to manage heat output during extended grinding passes on steel, aluminum, or coated surfaces.

Key Features

• Air-cooled gap design allows airflow through the pad to reduce disc and surface heat during grinding
• Reduced heat buildup extends abrasive disc service life
• Lowers risk of thermal damage to heat-sensitive workpiece materials
• 7-inch diameter fits standard large-disc angle grinders
• 5/8 inch-11 threaded hole for direct spindle mounting — no adapter required on most grinders
• Medium-density construction provides balanced support across flat and mildly contoured surfaces

Compatibility

Designed for use with 7-inch resin-fiber abrasive discs on angle grinders and disc grinders equipped with a 5/8 inch-11 threaded spindle.

Installation Notes

Installation is performed by threading the backup pad directly onto the grinder spindle and tightening by hand or with a spanner wrench per the tool manufacturer guidelines. Disconnect the grinder from its power source or remove the battery before mounting or removing the backup pad. Inspect the pad for cracks, deformation, or missing segments before each use and replace if damaged. Always mount a compatible fiber disc rated for the grinder RPM before operation.

Technical Specifications

• Diameter: 7 inches
• Mounting Hole Thread: 5/8 inch-11 threaded
• Density: Medium
• Cooling Type: Air-cooled (gapped construction)
• Shipping Weight: 0.75 pounds

Standard Information

• Brand: NORTON
• Manufacturer Part Number: 63642543422