Norton 66253262700 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253262700 is a Type 1 straight surface grinding wheel designed for precision stock removal on surface grinders, cylindrical grinders, and CNC cutting tool machines. It measures 12 inches in diameter, 1 inch thick, with a 3-inch arbor hole. The wheel is made from white aluminum oxide abrasive bonded in a vitrified bond matrix, producing a coarse, 46-grit cut rated H hardness. The semi-friable grain structure allows the wheel to fracture and self-sharpen during use, helping maintain consistent cut rates on softer workpiece materials. Maximum operating speed is 2070 RPM. This wheel carries the specification designation 38A46-HVBE.

This wheel is suited for grinding soft carbon steels, tool steels, and super alloys in both production and toolroom environments. Typical applications include surface grinding flat workpieces, OD cylindrical grinding, and sharpening cutting tools on CNC tool grinders. The white aluminum oxide formulation and H-grade hardness make it a standard choice when cool cutting action and free material removal are priorities over wheel longevity.

Key Features

• Type 1 straight wheel profile — no recess, no taper — for standard surface and cylindrical grinder spindles
• 46 grit, coarse grade aluminum oxide for aggressive stock removal
• H hardness (soft rating) with semi-friable grain promotes self-sharpening during cut
• Vitrified bond provides rigidity and porosity for consistent chip clearance
• White wheel color indicates white aluminum oxide abrasive, suitable for heat-sensitive toolroom applications
• Specification 38A46-HVBE for verified reorder against OEM machine requirements

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suited for soft carbon steels, tool steels, and super alloys. Confirm arbor hole size and maximum RPM rating against machine spindle specifications before mounting.

Installation Notes

Grinding wheel mounting must be performed by a qualified operator following ANSI B11.9 and OSHA 29 CFR 1910.215 guidelines. Always ring-test the wheel for cracks before mounting and never exceed the 2070 RPM maximum speed rating. Power down and lock out the grinder before changing wheels. Use proper blotter flanges and tighten the arbor nut to manufacturer specification — do not over-tighten.