Norton 66253002639 Surface Grinding Wheel 8in 60 Grit

Product Description

The NORTON 66253002639 is a Type 1 surface grinding wheel designed for precision material removal on ferrous metals and hard alloys. Built with ceramic abrasive grain and a vitrified bond, this wheel delivers consistent stock removal and long wheel life under demanding conditions. It measures 8 inches in diameter, 1 inch thick, with a 1-1/4 inch arbor hole, and carries a 60-grit, medium-grade specification rated to 3600 RPM. The semi-friable ceramic grain continuously fractures to expose fresh cutting edges, making it well-suited for heat-sensitive and high-hardness workpiece materials. Licensed grinding technicians and tool room machinists are the primary installers and operators of this wheel.

This wheel is intended for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in both production and tool-room environments. It performs across a broad range of difficult-to-grind materials including 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The 60-grit medium grade balances aggressive material removal with a reasonably smooth surface finish, making it a practical choice for roughing and intermediate grinding passes on hardened workpieces.

Key Features

• Ceramic abrasive grain with semi-friable character for self-sharpening cutting action
• Vitrified bond provides rigidity and porosity for effective coolant flow and chip clearance
• 60 grit medium grade balances cut rate and surface finish on hard ferrous materials
• Hardness Code I (medium) resists excessive wheel breakdown under steady feed rates
• Rated to 3600 RPM maximum operating speed
• No recess, no taper — standard Type 1 straight wheel geometry for broad machine compatibility

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. Fits machines with a 1-1/4 inch arbor bore.

Installation Notes

Grinding wheel mounting and dressing should be performed by qualified personnel following ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. Always inspect the wheel for cracks or damage using the ring test before mounting, and never exceed the 3600 RPM maximum operating speed marked on the wheel. Ensure the machine spindle speed is confirmed before operation, and use the correct flange size and blotters as specified by the machine manufacturer. Dress the wheel with an appropriate diamond dresser before first use to true the face and open the grain structure.