Norton 66252837421 Surface Grinding Wheel 60 Grit

Product Description

The NORTON 66252837421 is a Type 1 vitrified surface grinding wheel designed for precision stock removal and surface finishing on metallic workpieces. Measuring 6 inches in diameter by 3/4 inches thick with a 1-1/4 inch arbor hole, this wheel carries a 60-grit aluminum oxide abrasive at K hardness (medium grade). The vitrified bond provides rigidity and consistent cut rate, making it well-suited for wet or dry surface grinding where geometry and finish tolerance matter. Maximum operating speed is 4,140 RPM. Machinists, tool-and-die makers, and maintenance technicians are the typical end users.

This wheel is rated for use on 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. It mounts on surface grinders, cylindrical grinders, and CNC cutting tool machines. The 32A series designation reflects an aluminum oxide grain formulation that balances cut aggressiveness with wheel life across a broad range of ferrous and non-ferrous materials. It is appropriate for both production grinding and maintenance shop applications where a standard Type 1 straight wheel is specified.

Key Features

• 60-grit aluminum oxide abrasive for aggressive stock removal with moderate finish
• K hardness (medium grade) vitrified bond for consistent cut rate and wheel integrity
• Type 1 straight wheel profile with no recess, compatible with standard surface grinder spindle flanges
• 4,140 RPM maximum operating speed
• Porous wheel structure promotes coolant flow and chip clearance
• Rated for 400 series stainless, carbon steels, tool steels, aluminum, and iron alloys

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Compatible material applications include 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Specification code 32A60-KVBE. Arbor hole diameter is 1-1/4 inches; verify spindle and flange dimensions before mounting.

Installation Notes

Mounting and dressing of grinding wheels should be performed by qualified personnel following ANSI B11.9 and OSHA 29 CFR 1910.215 guidelines. Power down and lock out the grinder before installing or removing the wheel. Inspect the wheel for cracks or chips before mounting and perform a ring test; do not use a wheel that sounds dull or cracked. Always use the correct flanges and blotters, and allow the wheel to run at operating speed for at least one minute in a protected area before bringing it into contact with the workpiece.