Norton 66243530368 Type 11 Grinding Wheel 80 Grit

Product Description

The NORTON 66243530368 is a Type 11 vitrified aluminum oxide grinding wheel designed for precision tool grinding and surface finishing applications. Measuring 4 inches in diameter with a 1.5-inch overall thickness, this wheel carries an 80-grit medium-grade abrasive and a K hardness code, rated to a maximum of 5,730 RPM. The vitrified bond provides consistent abrasive exposure and good form retention under load. It is intended for use by machinists, tool-and-die shops, and grinding machine operators working with bench or pedestal grinders configured for cup-wheel geometry.

This wheel is suited for tool room and production grinding environments where controlled material removal and surface finish consistency are required. The aluminum oxide abrasive material performs well on high-speed steel, carbon steel, and similar ferrous tooling. The 80-grit medium grade balances stock removal rate with surface finish quality, making it practical for resharpening cutting tools, reconditioning worn edges, and general precision grinding tasks on a Type 11 cup wheel setup.

Key Features

• Type 11 cup wheel geometry with 1/4-inch face width for controlled contact
• 80-grit aluminum oxide abrasive, medium grade (K hardness code)
• Vitrified bond construction for consistent abrasive breakdown and form retention
• 5,730 maximum RPM rating — verify machine speed before mounting
• Non-porous wheel structure for stable performance in dry grinding
• Specification grade 32A80-KVBE for traceability and replacement sourcing

Compatibility

Designed for bench and pedestal grinders configured for Type 11 cup wheels with a 1.25-inch hole size and 3-inch hub diameter. Verify spindle speed does not exceed the 5,730 RPM maximum before installation.

Installation Notes

A qualified machinist or grinding operator should mount this wheel following ANSI B7.1 safe use standards. Disconnect and lock out power to the grinder before removing the existing wheel or installing a new one. Always perform a ring test before mounting to check for cracks, and run the wheel at operating speed for at least one minute behind a guard before bringing it into contact with work. Never exceed the 5,730 RPM maximum speed rating stamped or labeled on the wheel.