Norton 66253262509 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253262509 is a Type 1 flat surface grinding wheel engineered for demanding precision grinding applications on ferrous metals and superalloys. Built with a ceramic abrasive grain and a vitrified bond, this wheel delivers consistent stock removal and long service life on hard-to-grind materials. It measures 12 inches in diameter, 1 inch thick, with a 5-inch arbor hole, and is rated to a maximum of 2070 RPM. The coarse 46 grit and J hardness code (medium wheel hardness) make it well suited for aggressive material removal while maintaining shape integrity under sustained load. Licensed HVAC, machining, and metalworking professionals specify this wheel for production grinding environments.

This grinding wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. It performs on 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The porous, semi-friable ceramic structure allows for cooler cutting and resists loading when working these materials. It is a direct-mount wheel intended for stationary bench or machine grinding setups where consistent flatness and finish are required across production runs or toolroom applications.

Key Features

• Ceramic abrasive grain with vitrified bond for high material removal rates and wheel durability
• 46 grit coarse grade suited for aggressive stock removal on hard ferrous metals and superalloys
• J hardness (medium) retains cutting edges without excessive glazing under load
• Porous, semi-friable structure promotes cooler cutting and resists grain loading
• Type 1 flat wheel profile with no recess and no taper for straightforward machine mounting
• Rated at 2070 RPM maximum operating speed
• Blue wheel color consistent with Norton 5SG series ceramic grain specification

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Conforms to specification 5SG46-JVS.

Installation Notes

Installation should be performed by a qualified machine operator or grinding specialist familiar with ANSI B7.1 safety requirements for abrasive wheels. Before mounting, inspect the wheel for cracks or chips using the ring test, and confirm the machine spindle speed does not exceed the wheel's 2070 RPM maximum rating. Always use proper flanges and a compressible blotter between the flange and wheel face. Power down and de-energize the grinding machine completely before changing wheels.