Norton 66252843187 Type 27 Grinding Wheel 9in 30 Grit

Product Description

The NORTON 66252843187 is a Type 27 depressed center grinding wheel designed for aggressive material removal on angle grinders. Built with a zirconia alumina abrasive grain at 30 grit coarse grade, it delivers fast stock removal on tough metals including steel and stainless. The resinoid bond and reinforced fiberglass construction keep the wheel stable under load. At a maximum operating speed of 6,600 RPM, this wheel suits standard 9-inch angle grinders used in fabrication shops, job sites, and industrial maintenance environments.

This wheel is suited for heavy-duty grinding applications where fast, aggressive cutting action is required. The Type 27 raised-hub profile provides clearance for flat and surface grinding passes, making it effective on weld seams, casting flash, and structural steel. It is a go-to choice for ironworkers, pipefitters, and metal fabricators working with carbon steel, alloy steel, and similar ferrous materials. The threaded 5/8-11 arbor hole fits the standard spindle found on most 9-inch angle grinders.

Key Features

• Zirconia alumina abrasive grain for fast, cool cutting on ferrous metals
• 30 grit coarse grade for aggressive stock removal and weld blending
• Type 27 depressed center profile allows flat grinding with proper clearance
• Reinforced fiberglass construction for strength at operating speed
• Resinoid bond provides consistent grain exposure throughout wheel life
• 5/8-11 threaded arbor hole fits standard angle grinder spindles

Compatibility

Designed for use with 9-inch angle grinders equipped with a 5/8-11 threaded spindle. The Type 27 hub profile is compatible with standard Type 27 guard configurations on angle grinders rated for 9-inch wheels at or above 6,600 RPM.

Installation Notes

Installation and wheel changes must be performed by qualified personnel following ANSI B7.1 safety standards for abrasive wheels. Always power down and unplug or lock out the grinder before mounting or removing a wheel. Verify the grinder's rated RPM meets or exceeds the wheel's 6,600 RPM maximum before use, and confirm the guard is properly installed and rated for Type 27 wheels. Do not exceed the marked maximum RPM.