3M 7100055947 Flap Disc 577F 7 Inch 80 Grit Type 27

Product Description

The 3M 7100055947 is a 7-inch Type 27 flap disc in the 577F series, designed for high-pressure metalworking applications. It combines grinding and blending into a single pass, eliminating the need to swap between separate wheels. The disc uses alumina zirconia mineral with a grinding aid, delivering faster stock removal than aluminum oxide on steel, stainless, and other metals. Heavyweight polyester-backed flaps support aggressive applications including weld removal, beveling, and sharp-edge work. A quick-change mounting system reduces downtime during disc swaps. Grit is 80, suited for moderate to aggressive material removal with a blended surface finish.

This disc fits standard Type 27 angle grinders and is used in fabrication shops, structural steel work, pipe fitting, and maintenance welding environments. The 7-inch diameter makes it appropriate for larger weld beads, flat stock, and broader surface passes where a smaller disc would require multiple overlapping runs. It is used by metal fabricators, ironworkers, pipefitters, and maintenance technicians working on heavy-gauge ferrous and non-ferrous metals.

Key Features

• Alumina zirconia mineral with grinding aid cuts faster than aluminum oxide across all metal types
• Combined grinding and blending action completes finishing in one step
• Heavyweight polyester-backed flaps extend disc life under high-pressure use
• 80-grit rating balances aggressive removal with a blended surface finish
• Quick-change design reduces time spent on disc changes
• Type 27 flat profile suits surface grinding and weld blending

Compatibility

Designed as an OEM-style fitment for standard Type 27 angle grinders accepting 7-inch quick-change flap discs.

Installation Notes

Installation should be performed by qualified personnel familiar with angle grinder safety practices. Power down and disconnect the grinder before mounting or removing any disc. Verify that the grinder RPM rating meets or exceeds the disc RPM rating before operation. Inspect the disc for damage before each use and do not use a disc that shows cracking, uneven flap wear, or hub damage.

Technical Specifications

• Disc Diameter: 7 inches
• Grit: 80
• Disc Type: Type 27 (T27)
• Abrasive Mineral: Alumina Zirconia
• Backing Material: Heavyweight Polyester
• Attachment Style: Quick Change
• Weight: 0.84 pounds
• UOM: Each
• Minimum Order Quantity: 5
• UPC: 00051141309668

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100055947