Norton 66254491776 Flap Disc 6 in 40 Grit Type 29 Zirconia

Product Description

The NORTON 66254491776 is a Type 29 flap disc designed for aggressive material removal on metal, weld seams, and fabricated surfaces. Built with zirconia alumina abrasive at 40 grit, it delivers coarse-grade cutting action suited for grinding, blending, and stock removal in one pass. The disc measures 6 inches in diameter with a 7/8 inch arbor hole and is rated to 10,200 RPM. A fiberglass backing plate supports the overlapping abrasive flaps under load, maintaining disc integrity during extended use. Metal fabricators, welders, and pipefitters reach for this disc when they need fast material removal without switching tools.

This flap disc fits standard 6 inch angle grinders and is well suited to flat and contoured surface work on mild steel, stainless steel, and similar ferrous and non-ferrous metals. The Type 29 conical angle positions the abrasive flaps at an offset, concentrating cutting pressure at the leading edge for more aggressive stock removal compared to a flat Type 27 profile. Typical applications include weld blending, deburring, rust removal, and surface prep before coating or welding. The coarse 40 grit makes it the right choice for initial material removal rather than finishing passes.

Key Features

• 40 grit zirconia alumina abrasive for coarse, high-speed material removal
• Type 29 conical profile concentrates cutting pressure for aggressive stock removal
• Fiberglass backing plate maintains structural integrity under grinding loads
• 10,200 RPM maximum speed rating for use with standard 6 inch angle grinders
• 7/8 inch arbor hole fits common angle grinder spindle configurations
• Blue disc color for quick visual identification of grit and abrasive type on the job

Compatibility

Designed for use with 6 inch angle grinders accepting a 7/8 inch arbor attachment. Verify that the grinder free-speed rating does not exceed 10,200 RPM before mounting.

Installation Notes

Mounting and disc changes must be performed with the grinder unplugged or the battery pack removed. Confirm the spindle arbor size matches the 7/8 inch center hole before tightening the backing flange. Always inspect the disc for cracks or damage before each use and never exceed the rated 10,200 RPM maximum speed. ANSI B7.1 and applicable OSHA standards govern safe use of abrasive grinding discs on angle grinders.