Norton 66253207705 Surface Grinding Wheel 12in 60 Grit

Product Description

The NORTON 66253207705 is a Type 1 surface grinding wheel engineered for precision stock removal on hard and soft carbon steels and tool steels. Built to the 32AA series specification (32AA60-JVTRP), it uses an aluminum oxide abrasive bonded in a vitrified matrix at a medium J hardness rating. The wheel measures 12 inches in diameter, 1 inch thick, with a 5-inch arbor hole, and is rated to a maximum of 2070 RPM. The porous, vitrified bond structure promotes cool cutting and efficient swarf clearance, making it well suited for high-volume surface grinding operations where wheel breakdown and heat management matter most.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. The 60-grit, medium-grade specification targets applications that require aggressive material removal while still producing a controlled surface finish. It is the appropriate choice when working with hard carbon steels, soft carbon steels, and tool steels in a professional machine shop or toolroom environment. Licensed machinists, tool grinders, and grinding equipment operators are the typical users for a wheel of this type and size.

Key Features

• Aluminum oxide abrasive — effective on hard and soft carbon steels and tool steels
• Vitrified bond with porous structure promotes cool cutting and efficient swarf clearance
• 60 grit, J hardness (medium grade) balances stock removal rate with surface finish control
• Type 1 flat wheel profile with no recess — standard fitment for surface and cylindrical grinders
• 32AA series specification (32AA60-JVTRP) for consistent, repeatable performance
• Blue wheel color aids quick visual identification of series and grade in the shop

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Material applications confirmed by manufacturer include hard carbon steels, soft carbon steels, and tool steels. The 5-inch arbor hole and Type 1 flat profile must be matched to machine spindle and guard specifications before mounting.

Installation Notes

Grinding wheel mounting and dressing must be performed by qualified personnel following ANSI B11.9 and OSHA 29 CFR 1910.215 requirements for abrasive wheel machinery. Always inspect the wheel for cracks or chips using the ring test before mounting, and confirm that the machine spindle speed does not exceed the 2070 RPM maximum marked on the wheel. Power down and lock out the grinder before changing wheels, and use correct flange and blotter assemblies as specified by the machine manufacturer. Never exceed the rated maximum RPM under any operating condition.