3M 7100099270 Coated Fibre Disc 80 Grit 4.5 Inch 7/8 Arbor

Product Description

The 3M 7100099270 is a coated fibre disc engineered for rapid cutting on carbon steel in demanding fabrication and metalworking applications. Built on a stiff fiber backing with a strong resin bond, it carries 3M Precision Shaped Grain abrasive mineral that delivers higher cut rates and longer service life compared to conventional fibre discs. At 4.5 inches in diameter with a 7/8 inch arbor, this 80-grit disc fits standard angle grinders and disc pads used by metal fabricators, welders, and ironworkers. It is supplied as individual discs with a minimum order quantity of 100 units.

This disc is suited for heavy material removal tasks on carbon steel, including weld removal, weld blending, beveling, edge chamfering, and surface finish refinement. The 80-grit designation places it in the aggressive cutting range, making it appropriate for initial stock removal rather than fine finishing passes. Typical use environments include structural steel fabrication shops, pipe welding, and general ironwork where fast, consistent cut rates are required across high part volumes.

Key Features

• 3M Precision Shaped Grain abrasive delivers higher cut rates and longer disc life than conventional abrasive mineral
• Stiff fiber backing and strong resin bond resist tearing under aggressive grinding loads
• 80 grit provides aggressive stock removal for weld grinding, beveling, and edge chamfering on carbon steel
• Compatible with 3M disc pad face plates and hubs, sold separately
• 4.5 inch diameter with 7/8 inch arbor fits standard right-angle grinders

Compatibility

Designed for use with 3M disc pad face plates and hubs. Fits standard angle grinders accepting a 4.5 inch coated fibre disc with a 7/8 inch arbor.

Installation Notes

Mounting and operation of fibre discs is typically performed by metal fabricators or qualified grinding equipment operators. Always power down and disconnect or de-energize the grinder before mounting or removing a disc. Verify that the grinder RPM rating meets or exceeds the disc RPM rating before use. Inspect the disc for damage before each use and follow all applicable ANSI B11 and OSHA 1910.215 grinding safety requirements.

Technical Specifications

• Diameter: 4.5 inches
• Arbor Size: 7/8 inch
• Grit: 80
• Abrasive Type: Precision Shaped Grain (Coated)
• Backing: Stiff Fiber
• Weight: 0.038 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 100
• UPC: 00076308896072

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100099270