3M 7100099280 Fibre Disc 4.5 in 120 Grit Stainless Grinding

Product Description

The 3M 7100099280 is a coated fibre disc engineered for ultra-rapid stock removal on hard-to-grind metals. It uses 3M Precision Shaped Grain, a structured abrasive mineral that delivers higher cut rates and a cooler grinding action compared to conventional fibre discs. The disc incorporates a grinding aid that reduces heat buildup at the workpiece surface, making it well suited for heat-sensitive alloys including stainless steel and high nickel alloys. A stiff fibre backing paired with a strong resin bond gives the disc resistance to tearing under heavy load. It is installed on compatible disc pad face plates and hubs using a 7/8 inch arbor and is sized at 4.5 inches in diameter.

This disc is designed for professional metal fabrication and maintenance applications where aggressive material removal and surface refinement must be performed on stainless steel and high nickel alloys. Typical tasks include weld removal, weld blending, beveling, edge chamfering, and finish refinement. Its 120 grit rating makes it appropriate for blending and finishing passes following heavier grinding operations. Fabricators, pipefitters, and industrial maintenance technicians working on stainless assemblies will find this disc well matched to those demands.

Key Features

• 3M Precision Shaped Grain delivers higher cut rates and cooler grinding than conventional fibre disc abrasives
• Grinding aid minimizes heat generation, protecting heat-sensitive alloys like stainless steel and high nickel alloys
• 120 grit rating suited for weld blending, beveling, edge chamfering, and finish refinement
• Stiff fibre backing and strong resin bond resist tearing under heavy-load applications
• 4.5 inch diameter with 7/8 inch arbor mount for compatibility with standard angle grinders using disc pad face plates and hubs
• Each disc is sold individually; minimum order quantity is 100 units

Compatibility

Compatible with 3M disc pad face plates and hubs, sold separately. Requires a 7/8 inch arbor. Intended for use on stainless steel and high nickel alloys.

Installation Notes

Installation should be performed by qualified personnel following the grinder and disc manufacturer instructions. Confirm the grinder RPM rating meets or exceeds the disc maximum RPM before mounting. Power down and disconnect the grinder from its power source before changing discs. Always use the appropriate face plate or hub backing pad for this disc size and arbor configuration, and inspect the disc for damage before each use.

Technical Specifications

• Diameter: 4.5 inches
• Arbor Size: 7/8 inch
• Grit: 120
• Abrasive Type: 3M Precision Shaped Grain (Coated)
• Backing: Stiff Fibre
• Bond: Resin
• Unit of Measure: Each
• Minimum Order Quantity: 100
• Weight: 5.366 pounds
• Package Length: 11.21 inches
• Package Width: 6.7 inches
• Package Height: 6.95 inches
• UPC: 076308896541

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100099280