Norton 66252916221 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252916221 is a Type 1 surface grinding wheel engineered for precision stock removal on a range of metallic workpieces. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent cut rates and controlled wheel breakdown across wet and dry grinding operations. The wheel measures 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole, and is rated to a maximum of 3600 RPM. At 60 grit and H hardness code, it falls in the medium-grade range, offering a balance between aggressive material removal and surface finish quality. This wheel is part of the NORTON 25A Type 1 series, specification 25A60-HVP2.

This grinding wheel is suited for surface grinding, cylindrical grinding, and use on CNC cutting tool machines. It is designed for application on soft carbon steels, tool steels, and super alloys, making it a practical choice for tool rooms, maintenance shops, and production grinding environments where a general-purpose aluminum oxide wheel is required. The porous structure supports coolant flow in wet grinding setups while still performing adequately in dry conditions. Licensed trades machinists and tool grinders are the primary installers and operators of this consumable.

Key Features

• Aluminum oxide abrasive with semi-friable character for self-sharpening wheel action
• Vitrified bond provides rigidity and consistent form retention during grinding
• Porous wheel structure supports both wet and dry grinding operations
• 60 grit, H hardness code (medium grade) balances removal rate with finish quality
• Type 1 flat wheel profile with no recess, compatible with standard surface and cylindrical grinder spindles
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. The 1-1/4 inch hole accommodates standard grinding machine spindle arbors sized for 7 inch Type 1 wheels.

Installation Notes

Installation should be performed by a qualified machinist or grinding machine operator following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always perform a ring test before mounting and inspect the wheel for cracks or chips. Ensure the machine spindle speed does not exceed the 3600 RPM maximum rating marked on the wheel. Guard the machine properly before powering on, and dress the wheel before the first grinding pass.