3M 7100099287 Ceramic Fiber Disc 4-1/2 in 60 Grit

Product Description

The 3M 7100099287 is a 4-1/2 inch ceramic fiber disc designed for aggressive material removal on metal, stainless steel, and other hard surfaces. Part of the 787C series, it features a resinoid bond and coated abrasive construction with a ceramic grain that self-sharpens under pressure, maintaining cut rate longer than aluminum oxide alternatives. The arbor hole attachment type suits standard right-angle grinders. At 60 grit medium grade, it balances stock removal speed with surface finish, making it a practical choice for weld blending, deburring, and edge grinding tasks in fabrication and maintenance environments.

This disc is suited for use in metal fabrication shops, structural steel work, pipeline work, and general industrial maintenance. The 4-1/2 inch diameter fits the most common right-angle grinders used in trade environments. The orange fiber backing provides rigidity to support the ceramic abrasive layer during aggressive grinding passes. Typical applications include removing weld spatter, smoothing welds, and preparing metal surfaces for coating or inspection.

Key Features

• Ceramic abrasive grain self-sharpens for consistent cut rate throughout disc life
• 60 grit medium grade balances material removal speed with surface finish quality
• Resinoid bond holds abrasive securely under high-pressure grinding conditions
• Arbor hole attachment fits standard right-angle grinder backing pads
• Fiber backing provides rigid support for aggressive grinding applications
• Rated to 13,300 RPM for compatibility with common 4-1/2 inch grinders

Compatibility

Designed for use with standard 4-1/2 inch right-angle grinders equipped with a compatible arbor hole backing pad. Verify that the grinder speed rating does not exceed 13,300 RPM before use.

Installation Notes

Installation of fiber discs should be performed by qualified personnel familiar with angle grinder safety. Power down and disconnect the grinder from its power source before mounting or removing the disc. Confirm the backing pad size and arbor thread match the disc before tightening. Always inspect the disc for damage before use and do not exceed the maximum rated speed of 13,300 RPM. Follow ANSI B7.1 safety standards for abrasive wheel use.