3M 7100031307 Flap Disc 80 Grit Ceramic Type 29 4.5 in

Product Description

The 3M 7100031307 is a Type 29 ceramic flap disc designed for aggressive grinding and blending on metal surfaces. Built on a cloth backing and rated to 13,300 RPM, this 80-grit disc delivers consistent medium-grade stock removal with the extended life typical of ceramic abrasive grain. The angled Type 29 profile increases surface contact on flat work, making it well suited for weld seam removal, surface preparation, and edge blending. At 0.34 pounds, it is a lightweight single-unit disc intended for use on a 4.5-inch angle grinder with a 5/8-11 arbor spindle.

This disc is a standard fit for metal fabrication, structural steel work, and maintenance grinding tasks in industrial and commercial environments. The ceramic grain is self-sharpening under load, which helps maintain cut rate over the disc life without requiring heavy operator pressure. Typical users include metal fabricators, welders, pipefitters, and maintenance technicians who need reliable material removal on steel and stainless applications.

Key Features

• Type 29 angled flap design increases surface contact for flat and contour grinding
• Ceramic abrasive grain provides aggressive, self-sharpening cut on ferrous metals
• 80 grit medium grade — suitable for weld blending and general surface prep
• Cloth backing for durability and heat resistance under load
• 13,300 RPM maximum speed rating for use on standard 4.5-inch angle grinders
• 5/8-11 arbor attachment for direct mount on common grinder spindles

Compatibility

Designed for use on 4.5-inch angle grinders with a 5/8-11 threaded spindle. Part of the 3M 967A series.

Installation Notes

Installation is performed by threading the disc directly onto the grinder spindle — ensure the grinder is unplugged or the battery removed before mounting or removing the disc. Verify the grinder's rated RPM does not exceed the 13,300 RPM maximum marked on the disc before operation. Eye protection, gloves, and a face shield are required during use per standard grinding safety practice. Inspect the disc for cracks or damage before each use and do not use a disc that shows signs of deterioration.