Tru-maxx 66254443419 Flap Disc 80 Grit 4.5 in Type 29

Product Description

The TRU-MAXX 66254443419 is a Type 29 zirconia alumina flap disc designed for aggressive grinding and blending on steel and stainless steel. The conical Type 29 profile keeps abrasive material in contact with the workpiece at a low angle, making it effective for flat surface work and weld blending. At 80 grit, this medium-grade disc removes material efficiently without excessive surface aggression. It mounts via a threaded arbor hole sized at 5/8-11, the standard thread for 4.5-inch angle grinders. The poly-cotton backing provides flexibility and heat dissipation under load. Rated to 13,300 RPM, it is compatible with standard right-angle grinders used in fabrication, welding, and maintenance trades.

This flap disc is suited for metalworking applications in fabrication shops, field welding, structural steel work, and maintenance grinding on stainless steel equipment. The zirconia alumina abrasive self-sharpens as it wears, extending useful disc life compared to aluminum oxide alternatives. Typical users include ironworkers, welders, pipefitters, and maintenance mechanics who need consistent material removal on carbon steel and stainless steel surfaces without loading or glazing.

Key Features

• Type 29 conical profile for low-angle flat surface grinding and weld blending
• Zirconia alumina abrasive with self-sharpening properties for extended disc life
• 80 grit medium grade balances material removal rate with surface finish
• 5/8-11 threaded arbor hole fits standard 4.5-inch angle grinder spindles
• Poly-cotton backing offers flexibility and heat management under load
• 13,300 RPM max speed rating for use with full-size 4.5-inch grinders

Compatibility

Designed for use on steels and stainless steel. Fits angle grinders with a 5/8-11 threaded spindle accepting a 4.5-inch disc. Part of the GP-Z series.

Installation Notes

This disc is installed by a qualified operator onto an angle grinder equipped with the correct guard for flap disc use. Verify the grinder free-speed RPM does not exceed the 13,300 RPM disc rating before mounting. Secure the disc firmly onto the 5/8-11 threaded spindle using the appropriate backing flange and locking nut. Inspect the disc for damage before each use and never operate without the grinder guard in place.