3M 7100109858 Fibre Disc 782C 4.5 Inch 36 Grit

Product Description

The 3M 7100109858 is a coated fibre disc in the 782C series, designed for ultra-rapid cutting on carbon steel. It measures 4.5 inches in diameter with a 7/8 inch arbor hole and carries a 36-grit abrasive. The disc uses 3M Precision Shaped Grain, an advanced abrasive mineral that delivers higher cut rates and longer disc life compared to conventional fibre discs. The stiff fibre backing and strong resin bond resist tearing under load. Licensed tradespeople and fabricators in metalworking and structural steel applications rely on this disc for demanding, high-material-removal tasks.

This disc is suited for heavy-duty metalworking applications including weld removal, weld blending, beveling, edge chamfering, and finish refinement on carbon steel. It is compatible with standard angle grinders and disc pads equipped with appropriate face plates and hubs. The 36-grit rating makes it an aggressive choice for stock removal rather than finishing passes. It is sold individually and is well matched to fabrication shops, structural steel work, and pipeline or vessel prep work where fast cut and disc longevity matter.

Key Features

• 3M Precision Shaped Grain delivers higher cut rates and outlasts conventional abrasive minerals on carbon steel
• 36-grit coated abrasive engineered for aggressive stock removal, weld grinding, beveling, and edge chamfering
• Stiff fibre backing and strong resin bond provide tear resistance under sustained load
• 4.5 inch diameter with 7/8 inch arbor fits standard angle grinder disc pads and hubs
• 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 standard angle grinders accepting a 4.5 inch coated fibre disc with a 7/8 inch arbor.

Installation Notes

Installation and disc changes should be performed by qualified personnel following the grinder and disc manufacturer guidelines. Power down and disconnect the grinder from its power source before mounting or removing the disc. Inspect the disc for damage before each use and do not exceed the maximum RPM rating marked on the disc or grinder. Always use appropriate guarding and personal protective equipment when operating angle grinders with abrasive discs.

Technical Specifications

• Disc Diameter: 4.5 inches
• Arbor Size: 7/8 inch
• Grit: 36
• Abrasive Type: 3M Precision Shaped Grain
• Backing: Stiff fibre
• Bond: Resin
• Package Dimensions: 8.5 x 5.5 x 10.13 inches
• Weight: 1.651 pounds
• UPC: 051125872541

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100109858