3M 7100100963 Roloc Fibre Disc 787C 4 Inch 80 Grit

Product Description

The 3M 7100100963 is a Roloc-style coated fibre disc designed for high-speed material removal on hard-to-grind metals. Built around 3M Precision Shaped Grain, this 787C disc delivers higher cut rates and a cooler grinding action compared to conventional fibre discs. At 4 inches in diameter and rated to 12000 RPM, it is well-suited for weld removal, beveling, edge chamfering, and surface blending. A built-in grinding aid reduces heat buildup at the workpiece, making it especially effective on heat-sensitive alloys such as stainless steel and high nickel alloys. Licensed metal fabricators, maintenance welders, and industrial trades are the primary installers.

This disc is used in fabrication shops, maintenance and repair operations, and field welding environments where rapid stock removal and surface refinement on stainless steel or high nickel alloys are required. The 80-grit designation targets aggressive cutting and weld blending rather than fine finishing passes. The Roloc-style threaded hub attachment mounts and dismounts without tools, supporting fast disc changes on compatible right-angle grinders during production workflows.

Key Features

• 3M Precision Shaped Grain provides higher cut rates and cooler grinding action than conventional abrasive grain
• Grinding aid minimizes heat buildup, reducing thermal damage risk on stainless steel and high nickel alloys
• Roloc-style hub attachment locks disc securely with no tools required, enabling fast changes
• Stiff fibre backing and strong resin bond deliver durability and tear resistance under heavy load
• 80-grit ceramic abrasive suited for weld removal, beveling, blending, and edge chamfering
• Rated to 12000 RPM for use on standard right-angle grinders

Compatibility

Designed for use with Roloc-compatible right-angle grinders and backing pads that accept a threaded Roloc hub attachment. No specific compatible model numbers were provided in the product data.

Installation Notes

Installation is performed by grinding and metal fabrication trades following standard angle grinder safety procedures. Verify the grinder RPM rating meets or exceeds the disc rating of 12000 RPM before mounting. Inspect the disc for damage before each use and never exceed the rated speed. Always wear appropriate PPE including a face shield, grinding gloves, and hearing protection when operating abrasive discs.

Technical Specifications

• Disc Diameter: 4 inches
• Grit: 80
• Maximum Speed: 12000 RPM
• Abrasive Type: Precision Shaped Grain (ceramic)
• Backing: Fibre
• Attachment Type: Roloc threaded hub
• Weight: 0.027 pounds
• UPC: 00076308897017

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100100963