Norton 66252938851 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252938851 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous metals. Built around an aluminum oxide abrasive grain and a vitrified bond matrix, this wheel delivers consistent cutting action and structural rigidity under the heat and pressure of wet or dry surface grinding operations. It measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. The 46 grit, coarse grade with an I hardness code (medium wheel hardness rating) makes it well suited for aggressive material removal on harder steels. Licensed HVAC and general metalworking trades, tool-and-die shops, and machine operators install and dress this wheel type.

This wheel is rated for surface grinders, cylindrical grinders, and CNC cutting tool machines. It is intended for use on hard carbon steels, soft carbon steels, and tool steels. The 32AA46-IVTR specification designates the exact abrasive structure, bond, and hardness combination engineered into this wheel. The porous structure of the wheel aids in coolant retention and chip clearance during extended grinding passes, reducing heat buildup at the workpiece surface. It is a non-tapered, no-recess Type 1 straight wheel configuration, the most common form factor found on horizontal and vertical spindle surface grinders in production and maintenance environments.

Key Features

• Aluminum oxide abrasive grain for reliable cutting action on ferrous materials
• Vitrified bond provides rigidity and resistance to oils, water, and common grinding fluids
• 46 grit coarse grade enables aggressive stock removal with moderate surface finish
• I hardness code (medium wheel hardness) balances wheel life against cutting efficiency
• Porous structure promotes chip clearance and coolant flow during extended use
• Maximum rated speed of 3600 RPM — do not exceed this value

Compatibility

Designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding hard carbon steels, soft carbon steels, and tool steels. Fits spindles with a 1-1/4 inch arbor bore.

Installation Notes

Grinding wheel mounting and dressing must be performed by qualified personnel following ANSI B7.1 safety standards. Before mounting, inspect the wheel for cracks using the ring test and confirm the machine spindle speed does not exceed the 3600 RPM rating marked on the wheel. Always use proper flanges and a compressible blotter on each side of the wheel. Power down and lock out the grinder before changing wheels, and allow the wheel to run at operating speed for at least one minute behind a guard before introducing work.