Tru-maxx 66254443420 Flap Disc 36 Grit Type 29 5 Inch

Product Description

The TRU-MAXX 66254443420 is a Type 29 zirconia alumina flap disc designed for aggressive material removal on steel and stainless steel. The conical Type 29 profile presents the abrasive at an angle, concentrating grinding pressure for faster stock removal compared to flat Type 27 discs. This disc runs a 36-grit very coarse abrasive on a poly-cotton backing, making it suited for weld blending, surface conditioning, and heavy grinding passes. It is rated to 12,200 RPM and mounts via a 7/8-inch arbor hole. Fabricators, welders, and metalworkers are the primary installers of this disc type in both shop and field environments.

The 66254443420 fits standard 5-inch angle grinders equipped with a 7/8-inch arbor. The GP-Z series zirconia alumina abrasive generates its own fresh cutting edges as the disc wears, which helps maintain cut rate through the life of the disc. This makes it a practical choice for prolonged weld seam blending, rust removal, and surface prep on structural steel, sheet metal, and stainless steel fabrications. Its blue poly-cotton backing provides flexibility and durability during aggressive grinding operations in both residential shop and commercial fabrication settings.

Key Features

• Type 29 conical profile for aggressive, angled stock removal
• 36-grit zirconia alumina abrasive rated very coarse for fast material removal
• Poly-cotton backing provides flexibility and extended disc life
• 12,200 RPM maximum speed rating for use with standard 5-inch angle grinders
• 7/8-inch arbor hole fits common grinder arbor sizes
• GP-Z series abrasive self-sharpens during use for consistent cut rate

Compatibility

Compatible with 5-inch angle grinders using a 7/8-inch arbor. Rated for use on steels and stainless steel per manufacturer material application data.

Installation Notes

Installation should be performed by a qualified operator following the grinder and disc manufacturer safety guidelines. Confirm the grinder's rated RPM meets or exceeds the disc's 12,200 RPM maximum before mounting. Inspect the disc for damage before each use and never operate a cracked or compromised disc. Always install the proper flange and guard per ANSI B7.1 requirements before operating the grinder.