Norton 66252836860 Type 12 Grinding Wheel 6in 46 Grit

Product Description

The NORTON 66252836860 is a Type 12 vitrified grinding wheel designed for tool grinding and precision sharpening applications. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent stock removal and maintains its form through extended use. The wheel measures 6 inches in diameter with a 1/2-inch overall thickness and a 3/8-inch face width, sized to fit tool and cutter grinders running at speeds up to 4,140 RPM. At 46 grit with a J hardness code, it is rated for coarse, aggressive material removal on ferrous tooling. This wheel is installed and dressed by machine operators, tool room technicians, and grinding specialists.

This wheel suits tool room environments where cutter geometry and edge condition matter. It is commonly used on tool and cutter grinders for reconditioning end mills, reamers, form tools, and similar high-speed steel or carbide-tipped tooling. The gray aluminum oxide composition makes it appropriate for general-purpose grinding on ferrous metals. The 1-1/4-inch arbor hole fits standard tool grinder spindles found in commercial machine shops and industrial maintenance facilities.

Key Features

• Type 12 wheel profile for tool and cutter grinder applications
• Aluminum oxide abrasive for general-purpose ferrous metal grinding
• Vitrified bond provides rigidity and consistent form retention
• 46 grit, J hardness for coarse stock removal with controlled cut
• 4,140 RPM maximum rated speed
• 1-1/4-inch arbor hole fits standard tool grinder spindles

Compatibility

Designed as a direct-fit replacement for Type 12 tool and cutter grinding wheels with a 6-inch diameter, 1-1/4-inch arbor hole, and 4,140 RPM or lower spindle speed rating. Specification code 32A46-JVBE.

Installation Notes

Installation should be performed by a qualified tool room technician or machine operator familiar with abrasive wheel safety. Before mounting, verify that the machine spindle speed does not exceed the 4,140 RPM maximum rating stamped on the wheel. Inspect the wheel for cracks or chips using the ring test before mounting, and ensure the flanges and blotters are clean and properly seated. Always dress the wheel after mounting and before the first cut. ANSI B11.22 and OSHA 1910.215 govern safe use of abrasive grinding wheels in industrial settings.