Norton 66243530398 Type 11 Grinding Wheel 4 in 100 Grit

Product Description

The NORTON 66243530398 is a Type 11 vitrified grinding wheel designed for precision tool grinding and sharpening applications. Built with white aluminum oxide abrasive, this wheel carries a 100 grit, K hardness (medium) rating that delivers fine stock removal with consistent surface finish. The wheel measures 4 inches in diameter and spins safely up to 5,730 RPM. The vitrified bond structure provides rigidity and cool cutting action, making it well suited for bench grinder work on high-speed steel tooling, carbide-tipped tools, and similar materials requiring controlled material removal.

This wheel is intended for use on bench or pedestal grinders in tool rooms, machine shops, and maintenance environments. Its fine grit and friable aluminum oxide grain make it appropriate for sharpening cutting tools, drill bits, lathe tools, and similar precision edges. The 1-1/4 inch bore fits standard bench grinder spindle configurations. Licensed machinists, tool-and-die makers, and skilled maintenance technicians are the typical installers and operators of this wheel type.

Key Features

• White aluminum oxide abrasive for cool, precise cutting action on tool steels
• 100 grit, K hardness (medium) for fine stock removal and consistent finish
• Vitrified bond provides rigidity and resistance to loading
• Friable grain structure promotes self-sharpening during use
• 5,730 maximum RPM rating for safe bench grinder operation
• Type 11 cup wheel profile with 1/4 inch face width

Compatibility

Designed as an OEM-style replacement or standard fit Type 11 cup wheel for bench and pedestal grinders accepting a 1-1/4 inch bore spindle arbor.

Installation Notes

This wheel must be installed and operated by qualified personnel following ANSI B7.1 safety standards for abrasive wheels. Always power down and lock out the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips before each use and perform a ring test prior to installation. Never exceed the stated maximum RPM, and always use proper flanges and blotters as required by the grinder manufacturer.