3M 7100100985 Roloca 782C Fibre Disc 36 Grit 4 Inch

Product Description

The 3M 7100100985 is a coated fibre disc in the Roloca 782C series, engineered for high-speed material removal on carbon steel. It uses 3M Precision Shaped Grain, an advanced abrasive geometry that cuts faster and lasts longer than conventional alumina or ceramic grain on standard fibre discs. Rated at 12000 RPM and sized at 4 inches in diameter with a 36-grit cut, this disc is built for aggressive grinding tasks including weld removal, beveling, edge chamfering, and blending. The stiff fibre backing and strong resin bond resist tearing under sustained load. The Roloca attachment system locks the disc securely to a compatible backing pad without tools.

This disc is suited for fabrication shops, structural steel work, pipefitting, and maintenance welding environments where rapid stock removal on carbon steel is required. The 36-grit abrasive makes it appropriate for initial weld grinding and heavy blending passes rather than finish work. Metalworking professionals and industrial maintenance technicians are the primary installers. The Roloca attachment system is designed for quick disc changes during high-volume production runs, reducing downtime between tasks.

Key Features

• 3M Precision Shaped Grain delivers higher cut rates and longer disc life compared to conventional fibre discs
• 36-grit abrasive supports aggressive weld grinding, beveling, and edge chamfering on carbon steel
• Rated at 12000 RPM for use with standard right-angle grinders
• Stiff fibre backing and strong resin bond provide tear resistance under heavy grinding loads
• Roloca attachment system locks disc to backing pad without tools, enabling fast changeovers
• 4-inch diameter fits compact right-angle grinders commonly used in tight workspaces

Compatibility

Designed for use with Roloca-compatible backing pads on standard right-angle grinders rated at or above 12000 RPM. Intended for use on carbon steel substrates.

Installation Notes

This disc must be mounted by a qualified operator following the grinder and backing pad manufacturer instructions. Verify that the grinder RPM rating meets or exceeds the disc RPM rating of 12000 before use. Always ensure the backing pad is rated for the Roloca system before attaching the disc. Wear appropriate PPE including a face shield, gloves, and hearing protection during operation.

Technical Specifications

• Diameter: 4 inches
• Grit: 36
• Maximum Speed: 12000 RPM
• Abrasive Type: 3M Precision Shaped Grain
• Disc Type: Coated Fibre
• Attachment System: Roloca
• Weight: 4.272 pounds
• UPC: 076308896855

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100100985