3M 7100178269 Quick Change Fibre Disc 120 Grit 4.5 in

Product Description

The 3M 7100178269 is a 4.5-inch quick-change coated fibre disc designed for aggressive material removal on hard-to-grind metals. Built with 3M Precision Shaped Grain, this disc delivers higher cut rates and a cooler grinding action compared to conventional fibre discs. A grinding aid is integrated into the construction to reduce heat buildup, making it especially well-suited for heat-sensitive alloys like stainless steel and high nickel alloys. Stiff fibre backing and a strong resin bond contribute to tear resistance and extended disc life. Weld removal, blending, beveling, edge chamfering, and finish refinement are all within its operating range. HVAC fabricators, industrial maintenance technicians, and metalworkers are the primary installers.

This disc is used in applications involving stainless steel and high nickel alloys where heat control and cut rate both matter. Typical jobs include weld grinding, weld blending, edge beveling, and surface finish refinement in fabrication shops, field service environments, and maintenance operations. The quick-change attachment system speeds up disc swaps during continuous production work. At 120 grit, it sits in the fine-to-medium finishing range, making it appropriate for blending passes after heavier stock removal has already been completed.

Key Features

• 3M Precision Shaped Grain provides higher cut rates and cooler grinding action versus conventional fibre discs
• Integrated grinding aid minimizes heat buildup on heat-sensitive alloys including stainless steel and high nickel alloys
• Stiff fibre backing and strong resin bond deliver durability and tear resistance under heavy use
• Quick-change attachment system allows fast disc swaps without tools
• 120 grit rating suits weld blending, beveling, and surface finish refinement
• 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, edge chamfering, and blending applications.

Installation Notes

Mount only on a grinder rated for the disc diameter and RPM before attaching the disc. Ensure the quick-change hub and face plate are properly seated and rated for the tool speed. Wear appropriate PPE including face shield, gloves, and hearing protection during operation. Inspect the disc for damage before each use and do not use a disc that shows cracking, tears, or delamination.