Norton 66253246797 Surface Grinding Wheel 7in 46 Grit

Product Description

The NORTON 66253246797 is a Type 1 vitrified aluminum oxide surface grinding wheel designed for precision stock removal on ferrous and non-ferrous metals. The wheel measures 7 inches in diameter, 0.5 inches thick, and carries a 1.25-inch arbor hole. It runs at a maximum of 3,600 RPM and is graded at 46 grit with an H hardness code, placing it in the coarse-cut, soft-bond range that favors aggressive material removal without loading on harder steels. Licensed HVAC, machine tool, and fabrication shops specify this wheel for surface grinders and cylindrical grinder setups where consistent face contact and open-pore chip clearance are required.

This wheel is suited for surface grinding operations on a wide range of materials including 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. The porous, vitrified bond structure allows for cool cutting and efficient swarf evacuation, making this wheel a practical choice for production grinding in job shops, tool rooms, and maintenance environments.

Key Features

• 46 grit coarse grade for aggressive stock removal
• H hardness (soft bond) rating for free-cutting action on hard materials
• Vitrified bond with porous structure for cool cutting and reduced loading
• Aluminum oxide abrasive compatible with a broad range of metals
• Type 1 flat wheel profile with no recess for full-face grinding contact
• Maximum operating speed of 3,600 RPM

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Compatible materials include 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Specification code 46H12V32A identifies grit, hardness, structure, and bond type for cross-referencing with machine setup requirements.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. Before mounting, inspect the wheel for cracks or chips using the ring test. Ensure the machine spindle speed does not exceed the 3,600 RPM maximum stamped on the wheel. Always install proper flange hardware, blotters, and guards before powering the grinder.