3M 7100213516 Fibre Disc 787C 4 Inch 120 Grit

Product Description

The 3M 7100213516 is the 787C Fibre Disc, a 4-inch diameter, 120-grit abrasive disc built around 3M Precision Shaped Grain ceramic mineral. The disc is engineered for high-speed material removal on hard-to-grind metals, including stainless steel and high nickel alloys. A built-in grinding aid actively reduces heat buildup at the contact zone, protecting heat-sensitive base materials from discoloration and thermal distortion. Stiff fibre backing and a high-strength resin bond keep the disc intact under aggressive pressure, delivering consistent cut rates across the life of the disc. Licensed tradespeople and fabrication professionals working weld removal, beveling, blending, and finish refinement will find this disc a direct performance upgrade over conventional fibre discs.

This disc is suited for metal fabrication, structural welding, and finishing operations in both shop and field environments. Typical applications include weld grinding, edge chamfering, bevel preparation, and surface blending on stainless steel components and high nickel alloy parts. The 4-inch diameter targets smaller grinders and angle grinder configurations used in tight access areas or precision work. The disc is compatible with 3M disc pad face plates and hubs, which are sold separately. Sold individually; minimum order quantities may apply for trade purchasing.

Key Features

• 3M Precision Shaped Grain delivers higher cut rates and cooler grinding than conventional abrasive minerals
• Integrated grinding aid reduces heat at the contact zone, protecting heat-sensitive alloys from thermal damage
• 120-grit rating balances aggressive stock removal with surface refinement capability
• Stiff fibre backing and strong resin bond resist tearing under heavy pressure and extended use
• 4-inch diameter fits compact angle grinders used in precision and confined-space applications
• 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 stainless steel and high nickel alloys in weld grinding, beveling, blending, and finish refinement applications.

Installation Notes

Mounting and disc changes should be performed by qualified personnel following the grinder manufacturer's guard and speed rating requirements. Verify that the grinder's rated RPM does not exceed the disc's maximum operating speed before use. Power down and disconnect the grinder before mounting or removing the disc. Always use the appropriate disc pad face plate and hub as specified by 3M for this disc series.

Technical Specifications

• Disc Diameter: 4 inches
• Grit: 120
• Abrasive Type: Precision Shaped Ceramic Grain
• Backing: Fibre
• Package Weight: 3.133 pounds
• Package Length: 11.21 inches
• Package Width: 6.7 inches
• Package Height: 6.95 inches
• UPC: 068060530146
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100213516