Norton 66623399150 Flap Disc 60 Grit Type 27 5 Inch

Product Description

The NORTON 66623399150 is a Type 27 zirconia alumina flap disc designed for aggressive grinding and blending on metal fabrication applications. The 5-inch disc features a 7/8-inch arbor hole and a cloth-backed coated abrasive construction rated at a medium 60 grit. A maximum operating speed of 12,000 RPM makes it compatible with standard angle grinders used in welding, fabrication, and structural steel work. The trimmable design allows the operator to expose fresh abrasive as the disc wears, extending usable life on the tool.

This flap disc is suited for weld blending, surface prep, and deburring on ferrous and non-ferrous metals in both shop and field environments. The Type 27 flat profile is appropriate for flat and slightly contoured surfaces where a lower grinding angle is preferred. Metal fabricators, welders, and ironworkers commonly use this disc for stock removal and finishing in one pass.

Key Features

• Type 27 flat profile for flat-surface grinding and blending
• 60 grit zirconia alumina abrasive for medium-grade stock removal
• Cloth backing provides flexibility and durability under load
• Trimmable construction allows exposure of fresh abrasive as disc wears
• 12,000 RPM maximum speed rating for use with standard angle grinders
• 7/8-inch arbor hole fits common grinder arbor sizes

Compatibility

Designed as an OEM-style replacement flap disc for use with 5-inch angle grinders accepting a 7/8-inch arbor attachment.

Installation Notes

Installation should be performed by a qualified operator following ANSI B7.1 and grinder manufacturer guidelines. Disconnect and de-energize the grinder before mounting or removing any abrasive disc. Confirm the grinder's rated RPM meets or exceeds the disc's 12,000 RPM maximum before operation. Always inspect the disc for damage prior to mounting and use the correct arbor flange and locking hardware.