Norton 66253220889 Surface Grinding Wheel 46 Grit 12 in

Product Description

The NORTON 66253220889 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous metals in industrial grinding applications. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cut rates and good form-holding under heavy-duty surface, cylindrical, and CNC cutting tool machine operations. It measures 12 inches in diameter, 1 inch thick, with a 3-inch hole size. The 46-grit coarse grade and H hardness code (soft wheel hardness rating) make it well-suited for aggressive material removal on harder steels where the wheel needs to break down and expose fresh abrasive. Maximum operating speed is 2,710 RPM. Wet or dry operation is supported.

This wheel is rated for use on hard carbon steels, soft carbon steels, and tool steels. It is intended for installation on surface grinders, cylindrical grinders, and CNC cutting tool machines in professional machine shop, tool room, and production grinding environments. The ruby-colored wheel body and porous structure promote cooler cutting and help reduce workpiece burn during extended grinding passes. Licensed machinists, tool grinders, and industrial maintenance professionals are the primary installers and operators of this wheel.

Key Features

• Aluminum oxide abrasive with vitrified bond for consistent form-holding and controlled breakdown
• 46-grit coarse grade for aggressive material removal on carbon and tool steels
• H hardness code (soft) promotes fresh abrasive exposure on harder workpiece materials
• Porous wheel structure reduces heat buildup and workpiece burn risk
• Supports both wet and dry grinding operations
• Rated to 2,710 RPM maximum operating speed

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding hard carbon steels, soft carbon steels, and tool steels. Specification code 48A46-HVP2 identifies this as part of the Norton 48A Type 1 series.

Installation Notes

Wheel mounting should be performed by a qualified machinist or grinding machine operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. Always inspect the wheel for cracks or chips before mounting and perform a ring test on vitrified wheels prior to installation. Ensure the machine spindle speed does not exceed the 2,710 RPM maximum rated speed marked on the wheel. Power down and lock out the grinder before changing wheels, and use proper flanges and blotters as specified by the machine manufacturer.