3M 7010362520 Flap Disc 577F 4 Inch 40 Grit Alumina Zirconia

Product Description

The 3M 7010362520 is a 4-inch, 40-grit coated flap disc engineered for high-pressure metalworking applications. Built on the 577F platform, it uses alumina zirconia mineral combined with a grinding aid to deliver faster stock removal than standard aluminum oxide abrasives across all metal types. Heavyweight polyester-backed flaps resist breakdown under sustained pressure, making this disc a reliable choice for weld removal, sharp-edge work, and beveling operations. Fabricators and metal finishing trades install this disc when a single-step grind-and-blend result is required without switching discs mid-job.

This flap disc is suited for residential fabrication shops and heavy commercial or industrial metalworking environments. Typical applications include weld seam removal, edge preparation, and surface blending on structural steel, stainless steel, and other metal substrates. The quick-change design reduces downtime between disc swaps, making it practical for production settings where tool uptime matters. It is sold individually and is appropriate for use on standard angle grinders configured for 4-inch accessories.

Key Features

• Alumina zirconia mineral with grinding aid cuts faster than aluminum oxide on all metal types
• Combines grinding and blending into a single pass, reducing total labor time
• Heavyweight polyester-backed flaps extend disc life under sustained high-pressure use
• Quick-change disc design minimizes downtime during disc replacement
• Suited for weld removal, sharp-edge work, and beveling in one step

Compatibility

Designed as an OEM-style replacement-grade abrasive flap disc for use on standard 4-inch angle grinders and compatible rotary grinding tools.

Installation Notes

Flap discs of this type are installed and serviced by metalworkers, fabricators, and welding trades. Before mounting, confirm the angle grinder is unplugged or has its power source isolated and the arbor guard is in place. Verify the grinder's maximum RPM rating meets or exceeds the disc's rated speed before operation. Follow applicable ANSI B7 abrasive safety standards and wear appropriate PPE including a face shield and gloves during disc changes and grinding operations.

Technical Specifications

• Disc Diameter: 4 inches
• Grit: 40
• Abrasive Type: Alumina Zirconia
• Backing Material: Heavyweight Polyester
• Disc Type: Coated Flap
• Package Weight: 0.26 pounds
• Package Length: 6.4 inches
• Package Width: 5.8 inches
• Package Height: 6.2 inches
• UPC: 00051141285443

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010362520