Tru-maxx 66254443130 Flap Disc 60 Grit 4 in Type 27

Product Description

The TRU-MAXX 66254443130 is a Type 27 zirconia alumina flap disc designed for aggressive stock removal and blending on ferrous metals. The 4-inch disc carries a 60-grit medium-grade abrasive surface bonded to a poly-cotton backing, delivering consistent cut rates and controlled heat generation during extended grinding sessions. It mounts via a 5/8-inch arbor hole and is rated to a maximum of 15,300 RPM, making it compatible with standard angle grinders used in fabrication, welding prep, and finishing work. The zirconia alumina grain self-sharpens under pressure, sustaining cut performance longer than standard aluminum oxide discs on steel and stainless steel surfaces.

This flap disc is suited for flat surface grinding and moderate contour work on carbon steel and stainless steel in both shop and field environments. Typical applications include weld seam removal, surface conditioning, and light deburring on structural steel, pipe, and sheet metal. The Type 27 flat-profile geometry keeps the disc face parallel to the workpiece, making it the right choice when surface blending over a broad, flat area is the priority rather than edge work.

Key Features

• Zirconia alumina abrasive grain self-sharpens under load for sustained cut rate on steel and stainless steel
• Type 27 flat profile geometry optimized for flat surface grinding and blending
• 60 grit medium grade balances stock removal speed with surface finish quality
• Poly-cotton backing provides flexibility and durability through full disc life
• 15,300 RPM max speed rating compatible with standard 4-inch angle grinders
• 5/8-inch arbor hole fits common angle grinder spindle sizes

Compatibility

Designed for use with 4-inch angle grinders equipped with a 5/8-inch arbor. Rated for material applications on steels and stainless steel per manufacturer specifications.

Installation Notes

Installation should be performed by qualified personnel familiar with angle grinder safety practices. Verify the grinder's free-speed RPM rating does not exceed the disc's 15,300 RPM maximum before mounting. Always install the proper guard for the disc type and inspect the disc for cracks or damage before each use. Wear appropriate PPE including eye protection and gloves, and ensure the workpiece is secured before grinding.