Norton 66252942817 Surface Grinding Wheel 60 Grit 7 in

Product Description

The NORTON 66252942817 is a Type 5 surface grinding wheel engineered for precision stock removal on ferrous metals and specialty alloys. Built from white aluminum oxide abrasive with a vitrified bond, this wheel delivers consistent, controlled cutting action across a range of grinding applications. The 38A series designation indicates a semi-friable grain structure, which allows the wheel to self-sharpen during use and resist glazing. At 7 inches in diameter and 1 inch thick with a 1-1/4 inch arbor hole, it mounts directly to standard surface and cylindrical grinding spindles. Rated to 3600 RPM maximum, it is sized for bench-mounted and pedestal grinding machine setups used by machinists, tool-and-die shops, and maintenance trades.

This wheel is suited for surface grinding and cylindrical grinding operations on soft carbon steels, tool steels, and super alloys. The medium grade and 60 grit combination provides a balance between aggressive material removal and a reasonably smooth finish on workpiece surfaces. The one-side recess design features a 3-inch recess diameter and 1/2 inch recess depth, which reduces weight and provides clearance for flange mounting configurations common on surface grinders. It is appropriate for production grinding environments as well as job-shop maintenance work requiring repeatable dimensional control.

Key Features

• White aluminum oxide abrasive grain — semi-friable, self-sharpening during grinding cycle
• Vitrified bond construction for rigidity, porosity, and consistent wheel form retention
• 60 grit, K hardness (medium grade) for balanced stock removal and surface finish
• Type 5 one-side recessed profile with 3-inch recess diameter and 1/2 inch recess depth
• 3600 RPM maximum speed rating for safe operation on surface and cylindrical grinders
• 38A series specification — designed for soft carbon steels, tool steels, and super alloys

Compatibility

Designed for use with surface grinders and cylindrical grinders accepting a 7-inch diameter, 1-1/4 inch arbor hole Type 5 wheel. Suitable for grinding soft carbon steels, tool steels, and super alloys per manufacturer material application data.

Installation Notes

Installation should be performed by a qualified machinist or grinding equipment operator following ANSI B7.1 safe mounting standards. Inspect the wheel for cracks or chips using a ring test before mounting — do not use a damaged wheel. Power down and lock out the grinder before changing wheels, and confirm that the machine spindle speed does not exceed the 3600 RPM maximum marked on the wheel. Always use appropriate flanges and blotters, and allow the wheel to run at operating speed with the guard in place for at least one minute before applying it to the workpiece.