Norton 66253313969 Surface Grinding Wheel 14in 46 Grit

Product Description

The NORTON 66253313969 is a Type 1 surface grinding wheel engineered for precision stock removal on ferrous metals and high-performance alloys. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cut rates and predictable wear characteristics across extended production runs. It measures 14 inches in diameter with a 1.5-inch face width and a 5-inch arbor hole, and it is rated to a maximum of 2320 RPM. The 46-grit coarse grade and H hardness code make it well-suited for aggressive material removal where surface finish requirements allow. Licensed HVAC technicians, machinists, and tool-and-die professionals working with pedestal or CNC surface grinders are the primary installers.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. The porous, vitrified bond structure promotes cool cutting by allowing coolant penetration and efficient swarf clearance. It performs reliably on soft carbon steels, tool steels, and super alloys where a coarse, open-structure wheel is needed to maintain wheel face condition without excessive loading. The white aluminum oxide grain is semi-friable, meaning it fractures under grinding pressure to continuously expose fresh cutting edges, extending effective wheel life compared to non-friable alternatives.

Key Features

• Type 1 flat wheel profile with no recess and no taper for straightforward mounting
• 46-grit coarse grade for high material-removal rate applications
• Aluminum oxide abrasive with semi-friable grain for self-sharpening performance
• Vitrified bond with porous structure supports coolant flow and reduces heat buildup
• H hardness rating provides a softer wheel action suited to harder workpiece materials
• Rated at 2320 RPM maximum operating speed

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. Series designation is 38A Type 1 with specification code 38A46-HVBEP.

Installation Notes

Grinding wheel mounting and dressing must be performed by a qualified machinist or grinding specialist following ANSI B11.9 safety requirements. Always power down and lock out the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips using a ring test before installation, and never exceed the maximum RPM stamped on the wheel or listed on its blotter. A wheel guard must remain in place during all grinding operations.