3M 7100099266 Fibre Disc 787C 80 Grit 7 Inch Abrasive

Product Description

The 3M 7100099266 is a 7-inch quick-change coated fibre disc designed for aggressive material removal on hard-to-grind metals. Built on a stiff fibre backing with a strong resin bond, the 787C uses 3M Precision Shaped Grain to deliver higher cut rates and cooler grinding temperatures compared to conventional fibre discs. A built-in grinding aid reduces heat at the workpiece surface, making this disc well suited for heat-sensitive materials. Rated at 8600 RPM, it is sized for use with standard right-angle grinders equipped with quick-change disc pads. Licensed tradespeople and fabricators performing weld removal, beveling, blending, or finish refinement will find this disc a reliable production-grade tool.

The 787C is engineered primarily for stainless steel and high nickel alloys, where heat buildup and disc wear are common challenges. Typical applications include weld grinding, edge chamfering, and surface blending in fabrication shops, field pipework, and structural steel environments. The 80-grit cut is aggressive enough for stock removal while still leaving a workable surface for downstream finishing steps. The quick-change attachment system minimizes disc swap time in production settings.

Key Features

• 3M Precision Shaped Grain delivers faster cut rates and lower grinding temperatures than conventional abrasive grain
• Built-in grinding aid reduces heat buildup on heat-sensitive alloys such as stainless steel and high nickel alloys
• Stiff fibre backing and strong resin bond resist tearing under heavy load
• 80-grit construction suited for weld removal, beveling, edge chamfering, and surface blending
• Rated at 8600 RPM for use with standard right-angle grinders
• Quick-change design compatible with 3M disc pad face plates and hubs (sold separately)

Compatibility

Compatible with 3M disc pad face plates and hubs sold separately. Designed for use on stainless steel and high nickel alloys with quick-change right-angle grinders accepting 7-inch fibre discs.

Installation Notes

Mounting and disc changes should be performed with the grinder fully powered off and unplugged or locked out per applicable OSHA and facility lockout/tagout procedures. Verify the grinder's rated RPM meets or exceeds the disc's 8600 RPM maximum before mounting. Inspect the disc for cracks, tears, or damage before each use and discard any disc that shows defects. Use appropriate personal protective equipment including face shield, gloves, and hearing protection during operation.

Technical Specifications

• Diameter: 7 inches
• Grit: 80
• Maximum Speed: 8600 RPM
• Abrasive Type: 3M Precision Shaped Grain, Coated
• Backing: Stiff Fibre
• Attachment Type: Quick Change
• Weight: 11.446 pounds
• Package Length: 21.59 inches
• Package Width: 8.7 inches
• Package Height: 8.95 inches
• UPC: 076308896503

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100099266