Norton 66254419984 Flap Disc 4.5 in 7/8 in 60 Grit Type 29

Product Description

The NORTON 66254419984 is a Type 29 conical flap disc from the Powerflex line, designed for aggressive grinding and blending on metal surfaces. The 4.5-inch diameter disc mounts on a 7/8-inch arbor and runs at 60 grit, making it suited for weld removal, rust elimination, and surface prep work where a balance of cut rate and finish is needed. The conical Type 29 geometry positions the abrasive at an angle, increasing surface contact and stock removal compared to flat Type 27 discs. Installers and fabricators working with mild steel, stainless steel, or aluminum will find this disc appropriate for medium-to-heavy material removal tasks.

This flap disc is intended for use with standard 4.5-inch angle grinders common in fabrication shops, mechanical rooms, and field service environments. The 60-grit designation places it in the medium-coarse range, useful for grinding down weld seams, smoothing heavy mill scale, and prepping surfaces before coating or welding. It is sold in a case quantity of 10 discs, making it practical for shop stocking or ongoing job-site use where disc consumption is high. Trades that commonly use this product include pipefitters, ironworkers, HVAC sheet metal workers, and general mechanical contractors.

Key Features

• Type 29 conical profile increases contact angle for higher stock removal rates
• 60 grit abrasive suited for weld blending, rust removal, and surface preparation
• 4.5-inch diameter fits standard 4.5-inch angle grinders
• 7/8-inch arbor hole for direct mounting without reducing hardware on most grinders
• Powerflex construction designed to flex and conform to contoured workpiece surfaces
• Case quantity of 10 discs supports production-level or multi-tech job-site use

Compatibility

Designed for use with 4.5-inch angle grinders equipped with a 7/8-inch arbor. Verify that the grinder's rated RPM meets or exceeds the maximum RPM rating marked on the disc before use.

Installation Notes

Flap discs must be installed and used by personnel familiar with angle grinder safety practices and applicable ANSI B7.1 grinding wheel safety standards. Confirm the grinder is unplugged or de-energized before mounting or removing the disc. Inspect the disc for cracks, delamination, or damage before each use and discard any disc that shows defects. Always use the appropriate guard and personal protective equipment including face shield, gloves, and hearing protection when operating angle grinders.

Technical Specifications

• Disc Diameter: 4.5 inches
• Arbor Size: 7/8 inch
• Grit: 60
• Disc Type: Type 29 (Conical)
• Product Line: Powerflex
• Minimum Order Quantity: 10
• Unit of Measure: Each

Standard Information

• Brand: NORTON
• Manufacturer Part Number: 66254419984