Tru-maxx 66254447223 Flap Disc 80 Grit 4.5 in Type 29

Product Description

The TRU-MAXX 66254447223 is a Type 29 zirconia alumina flap disc designed for grinding and blending on steel and stainless steel surfaces. At 4.5 inches in diameter with a 5/8-11 threaded arbor hole, it mounts directly to standard angle grinders without an adapter. The 80-grit medium-grade abrasive surface delivers aggressive stock removal while leaving a finish suitable for follow-up work. High-density flap construction extends disc life compared to standard-density alternatives. A poly-cotton backing supports the abrasive flaps under load, helping maintain consistent cut angle at the Type 29 conical profile. Rated at 13,300 RPM maximum, this disc handles typical right-angle grinder speeds. It is sold individually.

This disc is suited for fabrication shops, maintenance welding, and field metalwork where operators need to remove weld spatter, smooth welds, or blend surface irregularities on carbon steel and stainless steel. The Type 29 angled profile concentrates cutting action at the leading edge, making it effective on flat stock, structural shapes, and pipe. It fits the workflow of metal fabricators, ironworkers, pipefitters, and maintenance mechanics who run 4.5-inch angle grinders as a daily tool.

Key Features

• Type 29 conical profile concentrates abrasive contact for aggressive grinding on flat and contoured surfaces
• Zirconia alumina abrasive grain resists heat buildup and maintains cut rate longer than aluminum oxide on steel
• 80-grit medium grade balances stock removal speed with surface finish quality
• High-density flap construction extends service life under continuous use
• Poly-cotton backing material supports flaps and absorbs vibration during grinding
• 5/8-11 threaded arbor hole fits standard angle grinder spindles without a separate adapter

Compatibility

Designed for use with 4.5-inch angle grinders equipped with a 5/8-11 spindle thread. Rated for steel and stainless steel material applications.

Installation Notes

Mounting and disc changes must be performed with the grinder unplugged or the battery removed. Confirm the grinder's no-load RPM rating does not exceed 13,300 RPM before mounting this disc. Inspect the disc for cracks or damage before each use and discard any disc that shows signs of delamination. Eye protection, a face shield, and appropriate gloves are required when operating angle grinders per ANSI B11 and OSHA 1910.243 guidelines.