Norton 66254461186 Flap Disc 7 in 80 Grit Zirconia Alumina

Product Description

The NORTON 66254461186 is a 7-inch Type 29 flap disc engineered for aggressive stock removal and blending on metal surfaces. It uses zirconia alumina abrasive bonded to cloth-backed flaps, delivering consistent cut rate and longer service life compared to aluminum oxide alternatives. At 80 grit, it sits in the medium grade range, making it effective for weld blending, deburring, and surface conditioning in a single pass. Rated at a maximum of 8,600 RPM, the disc is designed for use on standard 7-inch angle grinders with a 7/8-inch arbor attachment. The Type 29 conical geometry provides a more aggressive contact angle than flat Type 27 discs, favoring edge work and contour grinding.

This flap disc is suited for fabrication shops, structural steel work, pipeline, and general metalworking environments. The zirconia alumina grain self-sharpens under pressure, making it a preferred choice for stainless steel, carbon steel, and hard alloys where consistent material removal is required across extended grinding cycles. It is installed by welders, metal fabricators, and maintenance technicians who need a reliable abrasive for prep and finishing work on flat or slightly contoured surfaces.

Key Features

• Type 29 conical design for aggressive contact angle and improved edge grinding
• Zirconia alumina abrasive for self-sharpening performance and extended disc life
• 80 grit medium grade suitable for weld blending, deburring, and surface prep
• Cloth backing provides flexibility and durability under high-pressure grinding
• 7/8-inch arbor attachment fits standard 7-inch angle grinders
• Maximum 8,600 RPM rating for safe operation on compatible tools

Compatibility

Designed as a direct-mount replacement flap disc for 7-inch angle grinders equipped with a 7/8-inch arbor, suitable for metalworking applications requiring medium-grade coated abrasive performance.

Installation Notes

Installation and disc changes should be performed by a qualified operator with the grinder fully powered off and unplugged. Verify the grinder spindle speed does not exceed the disc maximum RPM rating before mounting. Inspect the flap disc for cracks or damage before each use and discard any disc showing signs of delamination or wear past the backing plate. Always use the appropriate guard and personal protective equipment per ANSI B7.1 and applicable workplace safety standards.