Norton 66253220885 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253220885 is a Type 1 surface grinding wheel engineered for aggressive stock removal on hard ferrous metals and specialty alloys. Built with ceramic abrasive grain and a vitrified bond, this coarse-grade wheel delivers consistent, cool cutting action across a wide range of demanding applications. It measures 12 inches in diameter, 1 inch thick, with a 3-inch arbor hole, and carries a maximum operating speed of 2,710 RPM. The H hardness code places it in the soft-to-medium hardness range, making it well-suited for hard workpiece materials where wheel breakdown is needed to expose fresh cutting grain. Weight is 8 pounds. Licensed machinists, tool-and-die shops, and surface grinding specialists are the primary installers and users of this wheel.

This wheel is intended for use on surface grinders and cylindrical grinders, as well as CNC cutting tool machines. Material compatibility includes 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The porous structure supports both wet and dry operation, allowing coolant flow through the wheel face to reduce heat buildup during prolonged grinding passes. It is a non-recessed, non-tapered flat wheel with no relief geometry — a straightforward Type 1 profile for conventional surface grinding setups.

Key Features

• Ceramic abrasive grain (3SG series) for high material removal rates on hard alloys
• Vitrified bond with porous structure supports wet and dry grinding operation
• 46 grit, coarse grade for aggressive stock removal applications
• H hardness code (soft range) promotes self-dressing action on hard workpiece materials
• Type 1 flat profile with no recess — standard fitment for surface and cylindrical grinders
• Maximum speed rated at 2,710 RPM

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.

Installation Notes

Grinding wheel mounting and dressing should be performed by qualified personnel following ANSI B11.9 and OSHA 29 CFR 1910.215 standards. Always inspect the wheel for cracks or chips before mounting — never mount a damaged wheel. Power down and lock out the grinder before installing or removing the wheel, and confirm the machine spindle speed does not exceed the 2,710 RPM maximum rating stamped on the wheel. Perform a ring test and allow the wheel to run at operating speed under guard for at least one minute before bringing it into contact with the workpiece.