Norton 66243530415 Type 11 Grinding Wheel 4 in 60 Grit

Product Description

The NORTON 66243530415 is a Type 11 flaring cup grinding wheel designed for precision tool grinding and surface conditioning applications. Built with Ceramic Alumina abrasive and a Vitrified bond, it delivers consistent, free-cutting action across a range of ferrous and hard materials. The wheel measures 4 inches in diameter with a 1.5-inch overall thickness and a 0.25-inch face width. At 60 grit with a J hardness code (Medium grade), it is well-suited for moderate stock removal while maintaining reasonable surface finish. Rated to 5,730 RPM maximum, it is installed by machinists and tool-and-die professionals on bench grinders and pedestal grinders.

This wheel is used in tool rooms and maintenance shops for grinding cutting tools, reshaping worn edges, and general bench grinding tasks. The Ceramic Alumina abrasive is semi-friable, meaning it self-sharpens during use, which extends wheel life and reduces heat buildup at the workpiece. The blue wheel color is consistent with Nortons Ceramic Alumina product family. It is appropriate for both light production and occasional maintenance grinding on hard tool steels and similar materials.

Key Features

• Ceramic Alumina abrasive for free-cutting, long-lasting performance on tool steels
• Type 11 flaring cup wheel geometry with 0.25-inch face width
• Vitrified bond for rigid, precise stock removal and consistent grain exposure
• Semi-friable construction promotes self-sharpening during use
• 60 grit, J hardness (Medium grade) balances stock removal and surface finish
• 5,730 RPM maximum speed rating for safe operation on standard bench and pedestal grinders

Compatibility

Designed as an OEM-style replacement or direct-fit grinding wheel for Type 11 flaring cup wheel applications on bench grinders and pedestal grinders with a 1.25-inch arbor hole and a compatible RPM rating at or below 5,730 RPM.

Installation Notes

This wheel is typically installed by machinists or maintenance technicians on bench or pedestal grinders. Always power down and disconnect the grinder from its power source before mounting or removing a grinding wheel. Inspect the wheel for cracks or chips before installation and perform a ring test per ANSI B7.1 guidelines. Never exceed the 5,730 RPM maximum speed rating marked on the wheel, and always use the appropriate flanges and blotters as required by the grinder manufacturer.