Merit Abrasives 05539520419 Hook Loop Disc 80 Grit 4.5 in

Product Description

The MERIT ABRASIVES 05539520419 is a 4.5-inch hook and loop non-woven abrasive disc designed for surface conditioning, blending, and light material removal. It uses aluminum oxide abrasive at 80 grit, which places it in the medium grade range — suitable for cleaning welds, scuffing surfaces before coating, or deburring metal and composite materials. The flexible non-woven construction conforms to irregular surfaces and contours, making it a practical choice for both flat and curved workpieces. Rated to 13,000 RPM, this disc is compatible with standard random orbital and angle grinder tools equipped with hook and loop backing pads. It is sold individually per package.

This disc is used in metal fabrication, HVAC sheet metal work, plumbing rough-in, and general maintenance applications where surface prep is required before welding, brazing, or applying coatings. The medium 80 grit cut is appropriate for removing light oxidation, mill scale, or existing finish without aggressive material removal. Its flexibility allows it to seat properly on curved pipe sections, fittings, and formed sheet metal. Trade professionals in mechanical, plumbing, and fabrication shops commonly use this disc for pre-weld prep and post-weld blending on ferrous and non-ferrous metals.

Key Features

• 80 grit medium grade aluminum oxide abrasive for surface conditioning and light stock removal
• Non-woven flexible construction conforms to curved and irregular surfaces
• Hook and loop attachment for fast disc changes on compatible backing pads
• Rated to 13,000 RPM for use with standard angle grinders and random orbital tools
• 4.5-inch diameter fits widely available hook and loop backing pads
• No vacuum holes — suitable for dry freehand grinding applications

Compatibility

Designed as a hook and loop replacement disc for 4.5-inch backing pads used on angle grinders and random orbital sanders. No specific tool model compatibility was provided by the manufacturer for this SKU.

Installation Notes

Installation is performed by hand — press the disc firmly onto a compatible 4.5-inch hook and loop backing pad until fully seated. Confirm the tool RPM rating meets or exceeds 13,000 RPM before use. Inspect the disc for tears or separation before each use and discard any disc showing damage. Eye protection and appropriate PPE are required per standard shop safety practices.