Norton 66623341106 Flap Disc 80 Grit 4.5 in Type 29

Product Description

The NORTON 66623341106 is a Type 29 zirconia alumina flap disc designed for use with 4.5-inch angle grinders. It features an 80-grit medium-grade abrasive surface bonded to a plastic-backed hub, making it well suited for blending, grinding, and finishing on metal surfaces. The conical Type 29 profile maintains a consistent contact angle for aggressive stock removal while still allowing smooth surface transitions. Rated to 13,300 RPM, this disc is installed and used by metal fabricators, pipefitters, and general maintenance trades working on ferrous and non-ferrous metals.

This flap disc is appropriate for residential and commercial fabrication, structural steel work, weld blending, and surface prep applications. The 5/8-11 arbor hole fits standard angle grinder spindles commonly found in professional shop and field environments. Its medium grit makes it a practical choice when a balance between material removal rate and finish quality is required, such as prepping welds before inspection or smoothing cut edges on structural components.

Key Features

• Type 29 conical profile for aggressive grinding at low angles with smooth blending capability
• Zirconia alumina abrasive material delivers durable, consistent cut life on metal
• 80-grit medium grade balances stock removal with surface finish quality
• Plastic backing provides lightweight support and consistent flap presentation throughout disc life
• 5/8-11 arbor attachment fits standard angle grinder spindles without adapters
• 13,300 RPM maximum speed rating suitable for 4.5-inch angle grinders at rated speeds

Compatibility

Designed as an OEM-style replacement or direct-use flap disc for 4.5-inch angle grinders equipped with a 5/8-11 spindle thread, which is the standard arbor size for this disc diameter class.

Installation Notes

Installation is performed by grinding trades and metal fabrication professionals. Before mounting, ensure the grinder is unplugged or the battery is removed and verify the tool spindle speed does not exceed the disc maximum RPM rating. Seat the disc firmly against the backing flange and tighten the locking nut to the grinder manufacturer specification using the appropriate spanner wrench. Always inspect the disc for damage before use and never use a disc that is cracked, torn, or has loose flaps.