Norton 66252836988 Grinding Wheel 6 Inch 80 Grit Type 12

Product Description

The NORTON 66252836988 is a Type 12 tool room grinding wheel designed for precision grinding and sharpening of cutting tools. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent material removal on ferrous metals and hardened tool steels. The wheel measures 6 inches in diameter with a 1/2-inch overall thickness and a 3/8-inch face width. It carries an 80-grit, medium-grade designation with a hardness code of K, making it well suited for controlled stock removal on tool and cutter grinder setups. Maximum operating speed is rated at 4,140 RPM. This wheel is used by tool room machinists, grinding machine operators, and maintenance technicians performing edge restoration and reconditioning of HSS and carbide tooling.

The 66252836988 is intended for use on tool and cutter grinders in industrial tool rooms, machine shops, and maintenance facilities. Its Type 12 profile fits dedicated grinding spindles requiring a 1-1/4-inch arbor hole. The aluminum oxide abrasive is friable, meaning it self-dresses during use to expose fresh cutting edges, which helps maintain a consistent grind geometry over the life of the wheel. This makes it appropriate for batch reconditioning of drill bits, end mills, lathe tools, and similar HSS cutting tools where surface finish consistency matters.

Key Features

• Aluminum oxide abrasive with friable grain structure for self-dressing action during grinding
• Vitrified bond provides rigidity and precise form holding for tool grinding applications
• 80-grit medium grade for balanced stock removal and surface finish on cutting tools
• K hardness rating for effective use across a range of tool steel hardness levels
• Type 12 wheel profile with 1-1/4-inch arbor hole for standard tool and cutter grinder spindles
• Rated to 4,140 RPM maximum operating speed

Compatibility

Designed as an OEM-style replacement or standard supply wheel for tool and cutter grinders accepting a Type 12 wheel with a 1-1/4-inch arbor hole and a maximum speed rating of 4,140 RPM or lower.

Installation Notes

Mounting and dressing of grinding wheels should be performed by a qualified machine operator or maintenance technician following ANSI B11.9 and applicable shop safety standards. Always inspect the wheel for cracks or damage before mounting and perform a ring test per ANSI B7.1. Never exceed the maximum rated RPM of 4,140. Power down and lock out the machine before changing or dressing the wheel.