3M 7010363149 Flap Disc 577F 4.5 in 36 Grit T27

Product Description

The 3M 7010363149 is the 577F alumina zirconia flap disc, a coated abrasive tool built for high-pressure metalworking. It combines grinding and blending into a single pass, reducing total tool changes on the job. The disc runs at a maximum of 13300 RPM and fits a 4.5-inch angle grinder in a Type 27 (T27) flat-profile configuration. Alumina zirconia mineral, paired with a grinding aid, cuts faster and runs cooler than standard aluminum oxide, making it well suited for demanding tasks such as weld removal, beveling, and sharp-edge cleanup. Heavyweight polyester-backed flaps extend disc life under sustained pressure.

This flap disc is used in metal fabrication, structural steel work, pipe fitting, and welding shops where weld seams must be removed and the surface blended in one operation. At 36 grit, it is an aggressive cut suited to stock removal on carbon steel, stainless steel, and other hard metals. The T27 flat profile allows flush grinding on flat and slightly contoured surfaces. It is typically installed and used by welders, ironworkers, pipefitters, and metal fabricators working with 4.5-inch angle grinders.

Key Features

• Alumina zirconia mineral with grinding aid delivers more cutting power than aluminum oxide on all metal types
• Combines grinding and blending in a single step, reducing process time and disc changes
• Heavyweight polyester-backed flaps resist breakdown under sustained high-pressure use
• Type 27 flat profile for flush grinding on flat surfaces
• 36 grit aggressive cut rated for weld removal, beveling, and sharp-edge work
• 13300 RPM maximum speed compatible with standard 4.5-inch angle grinders

Compatibility

Designed for use with 4.5-inch angle grinders accepting T27 flap discs. No additional specific model compatibility data was provided by the manufacturer for this listing.

Installation Notes

Installation and disc changes should be performed with the grinder powered off and unplugged or the battery removed. Verify the grinder's rated RPM meets or exceeds the disc's 13300 RPM maximum before mounting. Inspect the disc for damage before each use and discard any disc showing torn flaps, cracks, or delamination. Always use the appropriate guard as required by ANSI B11 and applicable workplace safety standards.