Norton 66253044622 Surface Grinding Wheel 8in 46 Grit

Product Description

The NORTON 66253044622 is a Type 1 straight surface grinding wheel engineered for stock removal and precision surface finishing on ferrous and non-ferrous metals. It measures 8 inches in diameter, 1 inch thick, with a 1-1/4 inch arbor hole, and runs a 46-grit aluminum oxide abrasive bond in a vitrified matrix. At a coarse grade with a K hardness code and medium hardness rating, the wheel cuts aggressively while maintaining controlled breakdown on harder workpiece materials. Rated to 3,600 RPM, it is sized for surface grinders and cylindrical grinders commonly found in machine shops and tool rooms. Total wheel weight is 4.18 pounds.

This wheel is suited for surface grinding operations on 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. It is intended for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in production and maintenance grinding environments. The porous, vitrified bond structure promotes coolant flow and chip clearance, reducing heat buildup during extended grinding passes on tough materials.

Key Features

• 46-grit aluminum oxide abrasive for coarse, high-stock-removal grinding
• Vitrified bond with porous structure for improved coolant penetration and chip clearance
• K hardness code, medium hardness rating — resists glazing on harder steels
• Type 1 straight wheel profile, no recess, non-tapered
• 3,600 RPM maximum speed rating for standard surface and cylindrical grinder spindles
• Series 32A specification — suitable for a broad range of ferrous and non-ferrous materials

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for grinding 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

Grinding wheel mounting and dressing must be performed by qualified personnel in accordance with ANSI B11.9 and applicable shop safety standards. Before mounting, inspect the wheel for cracks or chips using the ring test — do not mount a damaged wheel. Power down and lock out the grinder before changing wheels, and confirm the spindle speed does not exceed the 3,600 RPM rating stamped on the wheel. After mounting, run the wheel at operating speed in a guarded position for at least one minute before bringing it into contact with the workpiece.