Norton 66254461176 Flap Disc 5 Inch 40 Grit Type 29

Product Description

The NORTON 66254461176 is a Type 29 zirconia alumina flap disc designed for aggressive material removal on metal, weld seams, and fabricated surfaces. The 5-inch diameter disc runs a 7/8-inch arbor hole and is rated to 12,000 RPM, making it compatible with standard angle grinders used in fabrication and metalworking shops. The 40-grit coarse grade cuts fast and removes stock efficiently, while the cloth backing provides flexibility and durability under load. Zirconia alumina abrasive grain self-sharpens during use, extending disc life compared to standard aluminum oxide alternatives. Licensed tradespeople in structural steel, pipe, and sheet metal work rely on this disc for grinding and blending operations.

This flap disc suits heavy-duty grinding, weld blending, and surface preparation tasks on carbon steel, stainless steel, and similar ferrous metals. The Type 29 conical shape directs abrasive contact at a low angle to the workpiece, improving stock removal rates and reducing operator fatigue on flat and contoured surfaces. It is sold individually and intended for use in professional metalworking, welding, and fabrication environments where consistent, repeatable stock removal is required.

Key Features

• Type 29 conical profile for aggressive grinding at low contact angles
• 40-grit coarse grade for fast stock removal and weld blending
• Zirconia alumina abrasive self-sharpens for extended service life
• Cloth backing adds durability and flexibility under grinding pressure
• 12,000 RPM maximum speed rating for standard angle grinder compatibility
• 7/8-inch arbor hole fits common angle grinder spindles

Compatibility

Designed as an OEM-style replacement flap disc for use with standard 5-inch angle grinders equipped with a 7/8-inch arbor spindle.

Installation Notes

Flap discs are installed and serviced by metalworkers, welders, and fabricators using standard angle grinders. Before mounting, confirm the grinder spindle speed does not exceed the 12,000 RPM disc rating. Inspect the disc for damage before each use and never mount a cracked or delaminated disc. Follow ANSI B7.1 and grinder manufacturer guidelines for disc mounting, guard requirements, and safe operating procedures.