Norton 66243529166 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243529166 is a Type 1 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with a silicon carbide abrasive grain at 60 grit, it delivers medium-grade stock removal on hard, brittle, and non-ferrous materials such as carbide, ceramics, cast iron, and hardened steels. The vitrified bond provides rigidity and cool cutting action, making it well suited for tight-tolerance internal grinding where surface finish and dimensional accuracy matter. Rated to a maximum of 10,825 RPM, this wheel is installed and operated by machinists, tool and die makers, and grinding specialists in production and maintenance environments.

This wheel is sized at 3 inches in diameter, 1 inch thick, with a 1/2 inch arbor hole, and features no recess, making it a straightforward mount for compatible internal grinding spindles. It is commonly used in surface, cylindrical, and internal grinding machines for finishing bores, holes, and internal profiles on hard materials. Typical applications include toolroom work, carbide die maintenance, and production grinding of hardened components where silicon carbide abrasive outperforms aluminum oxide.

Key Features

• Silicon carbide abrasive grain — effective on carbide, ceramics, cast iron, and hard non-ferrous materials
• 60 grit medium grade for controlled stock removal and moderate surface finish
• Vitrified bond construction for rigid, cool-cutting performance in internal grinding
• M hardness rating provides consistent wheel integrity during bore grinding operations
• No-recess Type 1 wheel profile for straightforward spindle mounting
• Maximum operating speed of 10,825 RPM

Compatibility

Designed as an OEM-style replacement or standard consumable for internal grinding machines accepting a Type 1 wheel with a 3-inch diameter, 1/2-inch arbor hole, and 1-inch face width.

Installation Notes

Installation of grinding wheels must be performed by qualified personnel in accordance with ANSI B11.9 and the machine manufacturer's specifications. Before mounting, ring-test the wheel for cracks and confirm the machine's rated spindle speed meets or exceeds the wheel's maximum operating speed of 10,825 RPM. Power down and lock out the grinder before changing wheels. Do not exceed the marked maximum RPM under any circumstance.