Norton 66252939530 Surface Grinding Wheel 220 Grit 7 in

Product Description

The NORTON 66252939530 is a Type 1 flat surface grinding wheel designed for precision stock removal and finish grinding on a variety of metallic workpieces. Built around an aluminum oxide abrasive in a vitrified bond matrix, this wheel delivers consistent cut rates and long service life. It measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole, and is rated to a maximum of 3600 RPM. The 220 grit, very fine grade produces smooth surface finishes suited to finishing operations rather than aggressive material removal. At 0.8 pounds, it is lightweight enough for extended use on bench-mounted or CNC surface grinders.

This wheel is intended for use on soft carbon steels, tool steels, and super alloys in industrial and job-shop environments. It is compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines. The series designation 38A220-MV identifies the aluminum oxide abrasive type, grit level, medium hardness rating (M), and vitrified bond. It is well suited to finishing passes where tight tolerances and surface finish quality are the priority over material removal rate.

Key Features

• 220 grit very fine aluminum oxide abrasive for smooth finish grinding
• Vitrified bond provides rigidity and consistent wheel geometry throughout the wheel life
• Semi-friable abrasive grain self-sharpens during use, reducing glazing on tool steels and super alloys
• Type 1 flat wheel profile with no recess, no taper — direct drop-in for standard arbor setups
• Medium hardness (M) rating balances wheel wear rate against cutting efficiency on a wide range of metals
• White wheel color aids visual inspection of wear and loading during service

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys per the manufacturer material application designation.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified operator or machinist following applicable ANSI B11 and OSHA 29 CFR 1910.215 safety standards for abrasive wheel machinery. Always perform a ring test before mounting to check for cracks. Power down and lock out the machine before mounting or removing the wheel. Never exceed the 3600 RPM maximum speed rating stamped on the wheel.