Tru-maxx 66254443421 Flap Disc 40 Grit Type 29 5 Inch

Product Description

The TRU-MAXX 66254443421 is a Type 29 zirconia alumina flap disc designed for aggressive material removal on steel and stainless steel surfaces. It carries a 40-grit coarse rating, making it well suited for weld grinding, surface blending, and stock removal where speed and cut rate matter. The disc measures 5 inches in diameter with a 7/8-inch arbor hole and is rated to 12,200 RPM. The poly-cotton backing provides flexibility that conforms to contoured surfaces while maintaining consistent abrasive contact throughout the disc life. Fabricators, pipefitters, and metalworkers are the primary installers and operators of this disc.

This flap disc is intended for use with 5-inch right-angle grinders fitted with a standard 7/8-inch arbor. It performs on mild steel, carbon steel, and stainless steel in both fabrication shop and field environments. The Type 29 conical design delivers a more aggressive cutting angle compared to a flat Type 27 disc, making it a practical choice for weld seam removal and heavy stock removal passes on flat and slightly contoured workpieces. The GP-Z series designation indicates a general-purpose zirconia line suited for production-level grinding tasks.

Key Features

• Type 29 conical flap disc geometry for aggressive grinding angle on flat and contoured surfaces
• 40-grit coarse zirconia alumina abrasive for fast stock removal and weld grinding
• 12,200 RPM maximum speed rating for use with standard 5-inch right-angle grinders
• 7/8-inch arbor hole fits common grinder spindle configurations
• Poly-cotton backing layer provides flexibility and extended flap life
• Rated for steel and stainless steel material applications

Compatibility

Designed for use on steel and stainless steel with 5-inch right-angle grinders equipped with a 7/8-inch arbor attachment. Verify that the grinder's rated RPM does not exceed 12,200 RPM before mounting.

Installation Notes

This disc is installed and operated by metalworkers, fabricators, and pipefitters using a 5-inch right-angle grinder. Always confirm the grinder's no-load RPM rating does not exceed the disc's 12,200 RPM maximum before mounting. Inspect the disc for damage before each use and do not use a disc that shows cracking, delamination, or missing flaps. Wear appropriate PPE including face shield, gloves, and hearing protection during operation.