Norton 66254461155 Flap Disc 4-1/2 in 36 Grit Type 29

Product Description

The NORTON 66254461155 is a Type 29 flap disc designed for aggressive material removal on metal, weld seams, and fabricated surfaces. It uses a zirconia alumina abrasive on a cloth backing, delivering a very coarse 36-grit cut that bites fast and runs cool under load. The conical Type 29 geometry presents the abrasive at an angle, making this disc well-suited to blending and grinding on flat and contoured workpieces. Rated at 13,300 RPM, it mounts on a 4-1/2 inch grinder via a standard 7/8 inch arbor hole. Fabricators, welders, pipefitters, and general metalworkers are the primary users of this disc.

This flap disc fits standard 4-1/2 inch right-angle grinders and is appropriate for production grinding, weld blending, and surface preparation in both shop and field environments. The 36-grit zirconia alumina construction handles mild steel, stainless steel, and other ferrous metals where a fast, aggressive cut is needed. It is suited to applications ranging from removing heavy mill scale to chamfering edges before welding. The cloth backing provides flexibility that allows the disc to conform slightly to irregular surfaces without glazing or loading quickly.

Key Features

• Type 29 conical profile for aggressive grinding and blending on flat and contoured surfaces
• 36-grit very coarse zirconia alumina abrasive for fast stock removal
• Cloth backing adds flexibility and durability during heavy use
• 13,300 RPM maximum speed rating for use on standard 4-1/2 inch angle grinders
• 7/8 inch arbor hole fits common grinder spindle configurations
• Blue disc color for quick visual grit identification in the shop

Compatibility

Designed for use on 4-1/2 inch right-angle grinders equipped with a 7/8 inch arbor. Do not exceed the 13,300 RPM maximum speed rating. Verify grinder guard and wheel guard compliance before mounting.

Installation Notes

Mount this disc on a grinder that has been fully powered down and unplugged before installation. Confirm the grinder's rated no-load RPM does not exceed 13,300 RPM prior to use. ANSI B7.1 and applicable OSHA standards require the use of a proper grinding guard when operating flap discs. Inspect the disc for damage before each use and do not use any disc that shows cracking, delamination, or uneven wear.