Norton 66252939460 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252939460 is a Type 1 surface grinding wheel engineered for aggressive material removal on hard ferrous metals and specialty alloys. Built with a ceramic abrasive grain and vitrified bond, it delivers consistent cut rates and cool grinding action under high-cycle production conditions. The wheel measures 7 inches in diameter, 1/4 inches thick, with a 1-1/4 inches arbor hole. Rated to 3600 RPM, it carries a J hardness code and medium grade designation, placing it in a mid-range hardness that resists glazing while maintaining form stability. Licensed machinists, tool-and-die shops, and CNC grinding facilities are the primary installers and operators of this wheel.

This wheel is rated for use on 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. It is sized for use with surface grinders and cylindrical grinders as well as CNC cutting tool machines. The semi-friable ceramic grain self-sharpens progressively during use, making it well suited for precision surface finishing passes and heavy stock removal cycles on difficult-to-grind materials where wheel life and cut consistency are both critical.

Key Features

• Ceramic abrasive grain with vitrified bond for controlled cut rate and thermal stability
• J hardness code, medium grade — resists glazing on hard steels and exotic alloys
• Porous structure promotes coolant flow and chip clearance during wet or dry grinding
• No recess, no taper Type 1 profile fits standard surface and cylindrical grinder spindles
• Semi-friable grain self-sharpens to extend wheel life on tough workpiece materials
• Blue wheel color consistent with 5SG series ceramic grain identification

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for 400 series stainless, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron applications.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or grinding machine operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards. Before mounting, inspect the wheel for cracks using a ring test — do not install a wheel that produces a dull thud. Power down and lock out the grinder before changing wheels, verify that the machine spindle speed does not exceed the 3600 RPM wheel rating, and use proper flanges and blotters when securing the wheel to the arbor.