Norton 66253043447 Surface Grinding Wheel 8in 100 Grit

Product Description

The NORTON 66253043447 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous metals using surface grinders, cylindrical grinders, and CNC cutting tool machines. Built with aluminum oxide abrasive and a vitrified bond, this wheel carries a 100 grit, fine grade specification and a K hardness rating, placing it in the medium-hardness range. At 8 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole, it is a standard form factor recognized by production grinders and tool room operators. The 38A series designation identifies the specific aluminum oxide grain formulation, which is semi-friable and well suited to heat-sensitive workpiece materials.

This wheel is intended for use in surface grinding and cylindrical grinding applications on soft carbon steels, tool steels, and super alloys. It fits production shops, tool and cutter grinding operations, and maintenance environments where consistent finish quality and controlled material removal are required. The Type 1 straight-wheel profile is compatible with horizontal-spindle surface grinders and cylindrical OD grinding setups. The non-porous, vitrified bond structure supports coolant use and provides dimensional stability under repeated thermal cycling common in production grinding cycles.

Key Features

• Aluminum oxide abrasive, 38A series semi-friable grain for cool, controlled cutting action on steels and super alloys
• Vitrified bond provides rigid wheel structure and compatibility with grinding coolants
• 100 grit fine grade produces smooth surface finishes with moderate stock removal
• K hardness (medium) balances wheel life against grain breakdown rate on soft to medium workpiece materials
• Type 1 straight-wheel profile fits standard surface grinder and cylindrical grinder spindle configurations
• 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 arbor hole fits standard grinding spindle arbors for Type 1 wheels in this diameter class.

Installation Notes

Grinding wheel installation must be performed by a qualified operator following ANSI B11.9 and OSHA 29 CFR 1910.215 guidelines for abrasive wheel machinery. Before mounting, ring-test the wheel for cracks and verify that the machine spindle speed does not exceed the 3600 RPM maximum marked on the wheel. Use proper blotter flanges and never exceed the rated speed under any circumstances. Guard the wheel per machine manufacturer specifications before powering the spindle.