3M 7100099777 Coated Fiber Disc 36 Grit 4.5 in

Product Description

The 3M 7100099777 is a coated fiber abrasive disc engineered for ultra-rapid stock removal on carbon steel. Built on a stiff fiber backing with a strong resin bond, it uses 3M Precision Shaped Grain technology to deliver higher cut rates and longer service life compared to conventional abrasive discs. At 4.5 inches in diameter with a 7/8 inch arbor and 36 grit, it is sized for standard angle grinders used in fabrication and metal finishing work. Trades including structural steel fabricators, welders, and pipefitters rely on this disc for demanding material removal tasks.

This disc is designed for aggressive metal-working applications on carbon steel. Typical use cases include weld removal, weld blending, bevel grinding, edge chamfering, and surface finish refinement. The 36 grit designation makes it well-suited for heavy stock removal passes before transitioning to finer grits. It is compatible with 3M disc pad face plates and hubs, which are sold separately. The disc is sold individually and is appropriate for both shop and field use wherever an angle grinder with a 7/8 inch arbor is employed.

Key Features

• 3M Precision Shaped Grain provides higher cut rates and more parts per disc than conventional abrasive minerals
• Stiff fiber backing and strong resin bond deliver durability and tear-resistance under load
• 36 grit suited for heavy stock removal including weld grinding, beveling, and edge chamfering
• Long-lasting abrasive grain helps lower cost per part over the disc life
• Compatible with standard 3M disc pad face plates and hubs (sold separately)

Compatibility

Compatible with 3M disc pad face plates and hubs sold separately. Designed for use with angle grinders accepting a 7/8 inch arbor and a 4.5 inch diameter fiber disc.

Installation Notes

This disc is installed and serviced by welders, metal fabricators, and grinding technicians using a compatible angle grinder. Before mounting or changing the disc, disconnect the grinder from its power source and confirm the tool is fully stopped. Verify that the grinder's rated RPM meets or exceeds the disc's maximum RPM rating before operation. Inspect the disc for damage or delamination prior to each use and replace immediately if any defect is found.

Technical Specifications

• Diameter: 4.5 inches
• Arbor Size: 7/8 inch
• Grit: 36
• Disc Type: Coated Fiber
• Abrasive Grain: 3M Precision Shaped Grain
• Application Material: Carbon Steel
• Weight: 0.051 pounds
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100099777