3M 7100099291 Fibre Disc 787C 4.5 Inch 36 Grit

Product Description

The 3M 7100099291 is a quick-change coated abrasive fibre disc designed for aggressive material removal on hard-to-grind metals. Built around 3M Precision Shaped Grain, this 4.5-inch diameter disc operates at 36 grit and delivers higher cut rates and cooler grinding temperatures compared to conventional fibre discs. A grinding aid is bonded into the disc to further reduce heat buildup, making it well suited for heat-sensitive alloys. Stiff fibre backing and a strong resin bond provide durability and resistance to tearing under sustained load. Licensed tradespeople in metal fabrication, welding, and pipefitting are the primary installers of this consumable.

This disc is intended for weld removal, blending, beveling, edge chamfering, and finish refinement on stainless steel and high nickel alloys. The quick-change design allows for fast disc swaps on compatible angle grinders equipped with appropriate disc pad face plates and hubs, reducing downtime during heavy fabrication work. It is suited for both shop and field applications where consistent cut performance across multiple passes is required.

Key Features

• 3M Precision Shaped Grain delivers higher cut rates and cooler grinding versus conventional fibre discs
• Grinding aid minimizes heat buildup for use on heat-sensitive stainless steel and high nickel alloys
• Stiff fibre backing and strong resin bond resist tearing under heavy load
• Quick-change mount enables rapid disc replacement on compatible pad face plates and hubs
• Effective for weld grinding, beveling, edge chamfering, blending, and finish refinement
• Long disc life helps lower cost per part on high-volume grinding tasks

Compatibility

Compatible with 3M disc pad face plates and hubs sold separately. Designed for use on stainless steel and high nickel alloys with compatible quick-change angle grinders.

Installation Notes

Disc mounting and replacement should be performed by qualified personnel familiar with angle grinder safety practices. Always power down and disconnect the grinder from its power source before changing discs. Verify that the grinder RPM rating meets or exceeds the disc RPM rating before operation. Wear appropriate PPE including face shield, gloves, and hearing protection when grinding.

Technical Specifications

• Diameter: 4.5 inches
• Grit: 36
• Abrasive Type: Coated Fibre Disc
• Grain Technology: Precision Shaped Grain
• Mount Type: Quick Change
• Weight: 7.821 pounds
• Package Length: 21.59 inches
• Package Width: 6.7 inches
• Package Height: 6.95 inches
• UPC: 076308896336

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100099291