Norton 66261121287 Flap Disc 80 Grit Type 29 4.5 Inch

Product Description

The NORTON 66261121287 is a Type 29 zirconia alumina flap disc designed for aggressive material removal and blending on metal surfaces. Measuring 4.5 inches in diameter with a 5/8-11 threaded arbor hole, it accepts standard angle grinder spindles without an adapter. The 80-grit medium-grade abrasive is mounted on an X-weight fiberglass backing, which provides rigidity and durability under sustained grinding pressure. Rated at 13,000 RPM maximum, this disc is built for professional use in fabrication shops, pipe work, and structural steel applications where consistent stock removal and edge blending are required.

This flap disc is suited for use on steels, stainless steel, and titanium. The Type 29 conical geometry positions the abrasive flaps at an angle to the workpiece, increasing contact area and making it effective for flat surface grinding, weld blending, and edge work. It is a common choice for metal fabricators, pipefitters, ironworkers, and maintenance technicians working with ferrous and non-ferrous metals in both shop and field environments.

Key Features

• Type 29 conical flap geometry for increased surface contact and aggressive stock removal
• 80-grit medium-grade zirconia alumina abrasive for efficient material removal on hard metals
• 5/8-11 threaded arbor hole fits standard angle grinder spindles directly
• X-weight fiberglass backing provides rigidity and resistance to deflection under load
• 13,000 RPM maximum speed rating for use with common 4.5-inch angle grinders
• Suitable for steels, stainless steel, and titanium workpieces

Compatibility

Designed for use with 4.5-inch angle grinders equipped with a 5/8-11 threaded spindle. Rated for material applications including steels, stainless steel, and titanium.

Installation Notes

Mounting and use should be performed by qualified personnel familiar with angle grinder safety and ANSI B7.1 guidelines. Verify that the grinder spindle speed does not exceed the 13,000 RPM disc rating before mounting. Inspect the disc for damage before each use and never use a disc that shows cracks, tears, or separation of the flaps. Always install the proper guard and wear appropriate PPE including a face shield during operation.