Norton 66253262515 Surface Grinding Wheel 80 Grit 12in

Product Description

The NORTON 66253262515 is a Type 1 surface grinding wheel engineered for high-performance stock removal on ferrous metals and hard alloys. Built with a ceramic abrasive grain and a vitrified bond, this wheel delivers consistent cut rates and long service life on demanding materials including stainless steel, tool steels, titanium, super alloys, and various grades of cast and ductile iron. It measures 12 inches in diameter, 1 inch thick, with a 5-inch arbor hole. The wheel carries an 80 grit, J hardness (medium grade) rating and is rated to a maximum of 2070 RPM. The semi-friable ceramic grain continuously fractures to expose sharp cutting edges, maintaining grinding efficiency across extended cycles.

This wheel is suited for precision surface grinding applications in machine shops, tool rooms, and manufacturing environments. It is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. The 5SG Type 1 series is particularly effective when grinding 400 series stainless steel, hard carbon steels, high-speed tool steels, titanium, super alloys, and cast iron families including gray, ductile, and malleable grades. The porous structure of the wheel assists with chip clearance and coolant flow during wet or dry grinding operations.

Key Features

• Ceramic abrasive grain with semi-friable characteristics for self-sharpening performance
• Vitrified bond provides rigidity and consistent form-holding under load
• 80 grit, J hardness (medium grade) balances material removal rate with surface finish quality
• Porous wheel structure improves chip clearance and coolant penetration
• Type 1 straight wheel profile with no recess for broad surface grinder compatibility
• Rated for stainless steel, tool steels, titanium, super alloys, and cast iron applications

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. Confirm arbor hole size, flange compatibility, and maximum spindle RPM before mounting.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified machinist or grinding machine operator following ANSI B11.9 and OSHA 29 CFR 1910.215 safe guarding standards. Before mounting, inspect the wheel for cracks or chips using the ring test, and verify that the machine spindle speed does not exceed the 2070 RPM maximum rating marked on the wheel. Always use proper flanges and blotters, and allow the wheel to run at operating speed for at least one minute behind a guard before presenting work. Never exceed the rated maximum RPM under any operating condition.