Norton 66252940873 Surface Grinding Wheel 54 Grit

Product Description

The NORTON 66252940873 is a Type 1 surface grinding wheel engineered for precision stock removal on a wide range of ferrous and non-ferrous metals. Constructed with aluminum oxide abrasive and a vitrified bond, it delivers consistent cut rate and form retention throughout its service life. The wheel measures 7 inches in diameter, 0.5 inches thick, with a 1-1/4 inch arbor hole, and is rated to 3600 RPM. At 54 grit with a coarse grade and I hardness code (medium hardness rating), it is well suited for aggressive material removal while maintaining workpiece dimensional control. The vitrified bond structure is porous, promoting coolant flow and chip clearance during wet or dry grinding operations.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in shop and industrial environments. It performs across a broad material range including 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Typical applications include surface grinding flat stock, tool reconditioning, and production grinding of machined components where consistent finish and wheel life are priorities for the machinist or tool-and-die professional.

Key Features

• Aluminum oxide abrasive with vitrified bond for consistent cut rate and long wheel life
• 54 grit coarse grade for aggressive material removal across multiple metal types
• I hardness code (medium hardness rating) balances wheel wear with cutting efficiency
• Porous wheel structure promotes coolant flow and chip clearance
• Rated to 3600 RPM maximum operating speed
• Type 1 flat wheel profile with no recess and no taper, compatible with standard surface grinder spindles

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Wheel series designation is 32A Type 1 with specification code 32A54-IVBE.

Installation Notes

Wheel mounting and dressing should be performed by a qualified machinist or grinding equipment operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. 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 3600 RPM maximum rating marked on the wheel. Use proper flanges and blotters sized to the arbor hole and never force-fit the wheel onto the spindle.