3M 7010308898 Flap Disc 80 Grit Type 27 4.5 Inch

Product Description

The 3M 7010308898 is a Type 27 flap disc designed for angle grinder use in metal grinding, blending, and finishing applications. Built with a zirconia alumina abrasive bonded to a cloth backing, this disc delivers consistent cut rates and extended service life compared to standard aluminum oxide discs. It carries an 80 grit (medium grade) rating, making it well suited for removing weld seams, deburring edges, and preparing surfaces before coating or painting. The disc is rated to a maximum of 13,300 RPM, which is compatible with most 4.5 inch angle grinders used in fabrication and maintenance work. Licensed tradespeople and skilled fabricators working in metal shops, construction, and industrial maintenance will recognize this disc as a reliable production-grade consumable.

This flap disc is intended for use on ferrous and non-ferrous metals in both light industrial and heavy fabrication settings. The Type 27 flat profile is best suited for flat surface grinding and work at low angles, typically 0 to 15 degrees. The arbor attachment type fits standard 7/8 inch center hole angle grinders. It is commonly used for weld blending on structural steel, surface conditioning on sheet metal, and general stock removal tasks. The cloth backing provides flexibility, allowing the disc to conform slightly to irregular surfaces without loading prematurely.

Key Features

• Zirconia alumina abrasive for aggressive cut and longer disc life versus aluminum oxide
• 80 grit medium grade — effective for weld removal, deburring, and surface prep
• Type 27 flat profile optimized for flat and low-angle surface grinding
• Cloth backing adds flexibility and resists tearing under load
• Rated to 13,300 RPM for compatibility with standard 4.5 inch angle grinders
• Arbor attachment with 7/8 inch center hole fits most common angle grinder spindles

Compatibility

Designed for use with 4.5 inch angle grinders equipped with a 7/8 inch arbor spindle. Verify that the tool RPM rating meets or does not exceed 13,300 RPM before mounting this disc.

Installation Notes

This disc is installed and operated by machinists, fabricators, pipefitters, and general tradespeople using angle grinders. Always confirm the tool is unplugged or the battery is removed before mounting or removing a flap disc. Inspect the disc for damage before each use and never operate above the rated maximum RPM. Wear appropriate PPE including a face shield, gloves, and hearing protection during operation.