Norton 66252938875 Surface Grinding Wheel 80 Grit 7 in

Product Description

The NORTON 66252938875 is a Type 1 straight surface grinding wheel built for stock removal and surface finishing on ferrous metals. It measures 7 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole. The wheel is constructed from aluminum oxide abrasive bonded with a vitrified bond and rated at a medium grade hardness (Hardness Code I). Rated to a maximum of 3600 RPM, it is designed for use on CNC cutting tool machines, cylindrical grinders, and surface grinders. The 32AA80-IVTR specification identifies the full wheel makeup for shop and procurement records.

This wheel is suited for precision surface grinding operations on hard carbon steels, soft carbon steels, and tool steels in production and toolroom environments. The porous vitrified bond structure supports consistent coolant flow and chip clearance during aggressive cuts. It is a practical choice for machine shops and grinding departments performing flat surface work, tool reconditioning, and part finishing on conventional or CNC surface grinders.

Key Features

• Aluminum oxide abrasive with vitrified bond for consistent cut rate on steel
• 80 grit, medium grade — balanced between stock removal and surface finish
• Porous wheel construction promotes coolant penetration and reduces heat buildup
• Type 1 straight wheel profile fits standard surface and cylindrical grinder spindles
• 3600 RPM maximum speed rating
• Full wheel spec designation: 32AA80-IVTR

Compatibility

Designed for use with CNC cutting tool machines, cylindrical grinders, and surface grinders. Suitable for grinding hard carbon steels, soft carbon steels, and tool steels. Arbor hole size of 1-1/4 inches fits standard surface grinder spindles accepting Type 1 straight wheels at this diameter.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or grinding specialist following ANSI B11.9 safety standards. Always inspect the wheel for cracks or chips using a ring test before mounting. Ensure the spindle speed does not exceed the 3600 RPM maximum rating stamped on the wheel. Use proper flanges, blotters, and guards as specified by the machine manufacturer before operating.