3M 7100105004 Ceramic Flap Disc 80 Grit Type 27 4.5 in

Product Description

The 3M 7100105004 is a Type 27 ceramic flap disc engineered for aggressive material removal and surface blending on metal substrates. Built around premium ceramic alumina abrasive bonded to a polyester-backed, fiberglass-reinforced disc, it delivers consistent cut rates across the full life of the disc. The 4.5-inch diameter disc fits a standard 5/8-11 threaded arbor and is rated to 13,300 RPM. At 80 grit medium grade, it sits in the range that balances stock removal speed with surface finish control, making it a practical choice for weld grinding, beveling, and deburring operations performed by fabricators and metalworkers.

This disc is suited for use on steel and stainless steel in fabrication shops, maintenance environments, and field metalworking applications. Common tasks include weld seam removal, beveling plate edges prior to welding, and deburring cut stock. The YF-weight polyester backing provides flexibility that allows the abrasive flaps to conform slightly to contoured or irregular surfaces without loading or glazing prematurely. It is used with standard 4.5-inch angle grinders equipped with a 5/8-11 threaded spindle.

Key Features

• Premium ceramic alumina abrasive for high cut rate and extended disc life on metal
• Type 27 flat profile suited for surface grinding and blending passes
• 80 grit medium grade balances aggressive stock removal with controlled finish
• YF-weight polyester backing offers flexibility for conforming to work surfaces
• Fiberglass backing plate provides structural rigidity at operating speed
• Rated to 13,300 RPM for use with standard 4.5-inch angle grinders

Compatibility

Designed for use with 4.5-inch angle grinders equipped with a 5/8-11 threaded spindle. Suitable for grinding, beveling, weld removal, and edge deburring on steel and stainless steel workpieces.

Installation Notes

Mounting and use of abrasive flap discs should be performed by qualified personnel following ANSI B7.1 and applicable workplace safety standards. Verify that the grinder spindle speed does not exceed the 13,300 RPM rating marked on the disc before mounting. Inspect the disc for damage before each use and discard any disc that shows cracks, tears, or delaminated flaps. Always use the appropriate guard and personal protective equipment when operating angle grinders with abrasive discs.