Norton 66253043712 Surface Grinding Wheel 8in 46 Grit

Product Description

The NORTON 66253043712 is a Type 1 surface grinding wheel engineered for precision stock removal on ferrous and non-ferrous metals. It measures 8 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. The wheel is constructed from aluminum oxide abrasive bonded with a vitrified bond, producing a porous, gray wheel rated at 46 grit coarse grade with an H hardness code. Rated to a maximum of 3105 RPM, it is suited for controlled, high-contact grinding passes on surface grinders and cylindrical grinders. The vitrified bond offers consistent breakdown and cool cutting action, making it a reliable choice for production and toolroom environments. The wheel weighs approximately 2.09 pounds.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. It is well suited for material removal on 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Licensed machinists, toolroom technicians, and industrial grinder operators are the primary users. The 32A series designation reflects a specific aluminum oxide grain formulation optimized for a broad range of metalworking applications in both production shops and maintenance environments.

Key Features

• Type 1 flat wheel profile with no recess, standard for surface and cylindrical grinding setups
• Aluminum oxide abrasive with vitrified bond for consistent grain breakdown and cool cutting
• 46 grit coarse grade suitable for aggressive stock removal
• H hardness (soft hardness rating) promotes free cutting action on hard, dense metals
• Porous structure aids coolant flow and chip clearance during wet or dry grinding
• Maximum spindle speed of 3105 RPM — do not exceed this rating

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Confirmed compatible material applications include 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

Mounting and dressing of grinding wheels should be performed by a qualified machinist or toolroom technician following ANSI B11.9 and OSHA 29 CFR 1910.215 standards. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Power down and lock out the grinder before changing wheels, and confirm the machine spindle speed does not exceed the 3105 RPM maximum rating stamped on the wheel. Dress the wheel with an appropriate diamond dresser before the first grinding pass to true the face and expose fresh abrasive.