Tru-maxx 66254443321 Flap Disc 40 Grit 4.5 in Type 27

Product Description

The TRU-MAXX 66254443321 is a Type 27 zirconia alumina flap disc designed for coarse stock removal on steel and stainless steel surfaces. At 4.5 inches in diameter with a 7/8 inch arbor hole, it mounts directly to standard angle grinders. The 40-grit coated abrasive cuts aggressively through weld spatter, mill scale, and surface oxides. Zirconia alumina grain self-sharpens under pressure, extending disc life compared to standard aluminum oxide alternatives. The poly-cotton backing provides flexibility for contoured or flat workpiece contact. Rated to 13,300 RPM, the disc is suited for continuous use with right-angle grinders in fabrication and maintenance applications.

This flap disc is used in metal fabrication shops, structural steel work, pipe welding prep, and general maintenance grinding. It performs on both mild steel and stainless steel, making it a practical choice for welders and fitters who work across material types. The Type 27 flat profile is appropriate for surface grinding and blending at low grinding angles. It is sold individually, making it easy to stock in small quantities or evaluate before committing to a larger supply.

Key Features

• Zirconia alumina abrasive grain self-sharpens under load for consistent cut rate
• Type 27 flat profile optimized for surface grinding and blending at low angles
• 40 grit coarse grade for aggressive stock removal and weld cleanup
• Poly-cotton backing adds flexibility for flat and slightly contoured surfaces
• 13,300 RPM max speed rating compatible with standard 4.5 inch angle grinders
• Rated for use on steels and stainless steel

Compatibility

Designed for use with standard 4.5 inch angle grinders equipped with a 7/8 inch arbor. Rated for material applications on steels and stainless steel per the GP-Z series specification.

Installation Notes

Installation is performed by qualified operators familiar with angle grinder safety. Confirm the grinder speed rating meets or exceeds the disc max RPM before mounting. Inspect the disc for cracks or damage before each use and never operate a damaged disc. Always use the appropriate guard and personal protective equipment including eye and face protection when operating abrasive discs.