Norton 66253263175 Surface Grinding Wheel 46 Grit 12 in

Product Description

The NORTON 66253263175 is a Type 5 recessed surface grinding wheel built for heavy-duty stock removal on soft carbon steels, tool steels, and super alloys. The wheel measures 12 inches in diameter and 1-1/2 inches thick with a 5-inch arbor hole, making it suited for production-scale surface and cylindrical grinding operations. The abrasive is aluminum oxide (38A series), bonded with a vitrified bond for rigidity and consistent cut. At 46 grit with an I hardness rating (coarse grade, medium hardness), this wheel cuts aggressively while remaining semi-friable to minimize heat buildup at the workface. Maximum rated speed is 2070 RPM.

This wheel is designed for use on surface grinders and cylindrical grinders in industrial and shop environments. The one-sided recess measures 1/2 inch deep with a 7-1/2-inch recess diameter, which reduces wheel weight and clears flange hardware on compatible spindle setups. Typical applications include flat grinding of steel tooling, die components, and alloy workpieces where consistent surface finish and controlled material removal are required. The white aluminum oxide abrasive suits applications where burn-sensitive materials or precision tolerances demand a cooler-cutting wheel.

Key Features

• Type 5 recessed wheel with one-sided recess: 1/2 inch deep, 7-1/2-inch recess diameter
• 38A aluminum oxide abrasive — semi-friable, white, cool-cutting on steels and super alloys
• Vitrified bond for rigidity, consistent form holding, and free-cutting action
• 46 grit coarse grade — aggressive stock removal on soft carbon steels and tool steels
• I hardness (medium) balances wheel life against workpiece heat generation
• Maximum rated speed of 2070 RPM for safe surface and cylindrical grinder use

Compatibility

Rated for use with surface grinders and cylindrical grinders. Suitable for grinding soft carbon steels, tool steels, and super alloys. Specification code 38A46-IVBE identifies the abrasive, grit, grade, bond, and series for direct cross-reference.

Installation Notes

Grinding wheel installation should be performed by a qualified machinist or grinding equipment operator following ANSI B11.9 and wheel manufacturer safety standards. Always power down and lock out the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the maximum rated RPM of 2070. Ensure flanges and blotters are correctly sized and seated before returning the machine to service.