Norton 66623399213 Flap Disc 60 Grit Type 27 5 Inch

Product Description

The NORTON 66623399213 is a Type 27 coated flap disc engineered for aggressive material removal on steel and stainless steel surfaces. Built with a ceramic alumina abrasive on a fiberglass backing, this disc delivers consistent cut rates and extended service life under heavy grinding loads. It runs at a maximum of 12,000 RPM and is sized at 5 inches in diameter with a 7/8 inch arbor hole, fitting standard angle grinders used in fabrication, weld prep, and surface conditioning work. At 60 grit, it falls in the medium grade range, making it well suited for blending welds and removing mill scale without excessive stock removal.

This flap disc is designed for use in metal fabrication shops, maintenance and repair operations, and structural steel work environments. The Type 27 flat profile is the standard choice when working on flat or low-contour surfaces where a depressed-center disc would contact the workpiece at a low angle. It is commonly deployed by ironworkers, pipefitters, welders, and industrial maintenance technicians who need a reliable disc for weld blending and surface prep on ferrous and non-ferrous metals.

Key Features

• Ceramic alumina abrasive material for consistent cut rate and longer disc life
• Type 27 flat profile suited for flat surface grinding and weld blending
• 60 grit medium grade for weld removal, scale removal, and surface conditioning
• Fiberglass backing provides structural rigidity under lateral load
• 12,000 RPM maximum speed rating compatible with standard angle grinders
• Blue disc color for quick visual identification in multi-disc environments

Compatibility

Fits angle grinders with a 5 inch disc capacity and a 7/8 inch arbor. Rated for use on steels and stainless steel per manufacturer application data.

Installation Notes

Installation is performed by qualified grinder operators following ANSI B7.1 safety standards for abrasive wheel use. Always inspect the disc for cracks or damage before mounting, and confirm the tool's rated RPM meets or exceeds the disc's 12,000 RPM maximum. Ensure the grinder guard is in place before operation. Do not exceed the disc's rated speed or use the disc for cutting operations unless specifically rated for that purpose.