Norton 66254461165 Flap Disc 4-1/2 in 36 Grit Type 29

Product Description

The NORTON 66254461165 is a Type 29 zirconia alumina flap disc designed for aggressive material removal on angle grinders. It carries a 36-grit very coarse rating, making it effective for weld grinding, heavy stock removal, and surface conditioning on steel and other metals. The cloth backing provides durability under high-load conditions, and the disc is rated to a maximum of 13,300 RPM. The 5/8-11 arbor hole fits the standard threaded spindle found on most 4-1/2 inch angle grinders. Metal fabricators, pipefitters, and ironworkers are the primary installers and users of this disc.

This flap disc is suited for use on ferrous and non-ferrous metals in fabrication shops, structural steel work, and pipe welding applications. The Type 29 conical shape presents the abrasive at an angle to the workpiece, which increases surface contact and improves cutting aggressiveness compared to a flat Type 27 disc. It is a practical choice for blending welds, removing mill scale, and shaping metal edges on both flat and contoured surfaces.

Key Features

• Type 29 conical profile for increased contact angle and aggressive stock removal
• Zirconia alumina abrasive material for extended cut life on metal
• 36-grit very coarse grade suited to weld grinding and heavy material removal
• Cloth backing delivers durability and flexibility under high-pressure use
• 5/8-11 arbor attachment fits standard angle grinder spindles
• 13,300 RPM maximum speed rating

Compatibility

Designed for use with 4-1/2 inch angle grinders equipped with a 5/8-11 threaded spindle. Verify that the grinder's no-load RPM does not exceed the 13,300 RPM maximum rating of this disc before use.

Installation Notes

Installation and use of flap discs on angle grinders should follow ANSI B7.1 safety standards and the grinder manufacturer's guidelines. Always confirm the tool's rated speed does not exceed the disc's maximum RPM before mounting. Use the correct flange and locking nut for a 5/8-11 arbor and ensure the disc is fully seated before powering the tool. Wear appropriate PPE including a face shield, gloves, and hearing protection during operation.