Merit Abrasives 05539520420 Hook Loop Disc 50 Grit 4.5 in

Product Description

The MERIT ABRASIVES 05539520420 is a 4.5-inch hook and loop abrasive disc designed for surface preparation, blending, and finishing applications. Built with a non-woven aluminum oxide construction, this disc delivers coarse-grade cutting action at 50 grit, making it well suited for removing rust, scale, weld spatter, and heavy surface contaminants. The flexible non-woven matrix conforms to irregular surfaces and contours without loading or glazing. It mounts quickly to any compatible hook and loop backing pad and runs at up to 13,000 RPM. Licensed tradespeople, fabricators, and surface prep technicians working in HVAC, plumbing, and light manufacturing will find this disc a reliable option for prep work before welding, coating, or assembly.

This disc is intended for use on metal surfaces where coarse material removal or aggressive blending is required. The 4.5-inch diameter fits standard right-angle grinders and disc sanders equipped with hook and loop pads. The brown non-woven construction handles both flat and contoured workpieces, and the absence of vacuum holes keeps the design simple and compatible with smooth-face backing pads. Typical applications include rust removal on pipe fittings, weld seam blending on sheet metal, and surface scuffing prior to primer or coating.

Key Features

• 50 grit coarse grade aluminum oxide abrasive for aggressive material removal
• Non-woven flexible construction conforms to irregular and contoured surfaces
• Hook and loop attachment for fast disc changes without tools
• Rated up to 13,000 RPM for use with standard right-angle grinders
• No vacuum holes — compatible with smooth-face hook and loop backing pads
• Brown disc color for easy grit identification in the shop

Compatibility

Designed for use with 4.5-inch hook and loop backing pads on right-angle grinders and disc sanders. No specific OEM model compatibility was provided in the product data.

Installation Notes

Install and remove this disc only with the grinder fully powered down and unplugged or locked out per applicable safety procedures. Verify the backing pad is rated for hook and loop attachment and that the tool RPM does not exceed the 13,000 RPM disc rating before operation. Inspect the disc for tears or damage before each use and replace if the abrasive material is worn or the backing is compromised. Eye protection, hearing protection, and appropriate gloves are standard PPE for abrasive disc operations.