Arc Abrasives 71-077808 Resin Fiber Disc 120 Grit 25 Pack

Product Description

The ARC ABRASIVES 71-077808 is a resin fiber disc designed for grinding and blending on mild steel and similar ferrous surfaces. Part of the Predator line, it features self-sharpening abrasive grains that expose fresh cutting edges as the disc wears, maintaining consistent stock removal throughout the disc life. At 7 inches in diameter with a 7/8 inch arbor hole, it mounts directly to standard angle grinders and disc grinders. Each box contains 25 discs at 120 grit, making this a cost-effective alternative to full ceramic abrasive options for shops and field crews that run high disc volumes.

This disc is suited for light to medium grinding, deburring, blending welds, and surface conditioning on mild steel workpieces. The 120 grit designation targets finishing and blending passes rather than aggressive material removal, making it appropriate for fabrication shops, maintenance crews, and metal finishing operations where surface finish quality matters after primary grinding is complete. It is sold by the box and sized for common 7-inch disc grinder platforms used across industrial, commercial, and trade settings.

Key Features

• Self-sharpening abrasive grains maintain cutting performance as disc wears
• 120 grit for finishing, blending, and weld seam conditioning
• 7 inches x 7/8 inches fits standard angle grinders and disc grinders
• Cost-effective alternative to full ceramic abrasive discs
• 25 discs per box for volume use in shop or field environments
• Optimized for mild steel and general ferrous metal surfaces

Compatibility

Designed for use with standard 7-inch angle grinders and disc grinders accepting a 7/8 inch arbor. Suited for mild steel grinding and blending applications.

Installation Notes

Resin fiber discs are installed by licensed grinding equipment operators and experienced fabricators following manufacturer and ANSI B11 safety guidelines. Before mounting, confirm the grinder speed rating meets or exceeds the disc maximum RPM rating, and inspect the disc for cracks or damage. Always use the correct backing pad rated for the disc diameter, and ensure the arbor nut is fully secured before operation. Wear appropriate PPE including face shield, hearing protection, and gloves during use.

Technical Specifications

• Disc Diameter: 7 inches
• Arbor Size: 7/8 inches
• Grit: 120
• Disc Type: Resin Fiber
• Box Quantity: 25 discs
• Weight: 1.25 pounds
• Application: Mild steel grinding and blending

Standard Information

• Brand: ARC ABRASIVES
• Manufacturer Part Number: 71-077808