Norton 66253262077 Surface Grinding Wheel 46 Grit 12 in

Product Description

The NORTON 66253262077 is a Type 1 straight surface grinding wheel engineered for high-stock-removal applications on steel. Built from aluminum oxide abrasive with a vitrified bond, this wheel delivers a coarse, consistent cut on hard and soft carbon steels as well as tool steels. It measures 12 inches in diameter, 1 inch thick, with a 5-inch arbor hole, and is rated for a maximum operating speed of 2,070 RPM. The vitrified bond structure is porous, which promotes chip clearance and reduces heat buildup during extended surface or cylindrical grinding passes. Hardness code I places it in the medium range, giving technicians a good balance between wheel life and free-cutting action.

This wheel is suited for production and tool-room grinding environments where flat, precise surface stock removal is required. It fits surface grinders, cylindrical grinders, and CNC cutting tool machines. The 32A series designation is a Norton internal specification (32AA46-IVTR) indicating the abrasive grade and bond system. It is appropriate for grinding hard carbon steels, soft carbon steels, and tool steels in both job-shop and light production settings. Machine operators and tool-and-die technicians are the primary users in these applications.

Key Features

• Aluminum oxide abrasive for reliable stock removal on ferrous metals
• Vitrified bond with porous structure promotes chip clearance and thermal management
• Coarse 46 grit for aggressive material removal
• Medium hardness rating (code I) balances wheel life and cut rate
• Type 1 straight profile fits standard surface and cylindrical grinder flanges
• Rated to 2,070 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suited for grinding hard carbon steels, soft carbon steels, and tool steels. Verify that the machine spindle speed does not exceed the 2,070 RPM maximum wheel rating before mounting.

Installation Notes

Installation must be performed by a qualified grinding machine operator following ANSI B7.1 safe-use requirements for abrasive wheels. Power down and lock out the machine 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 marked on the wheel or blotter. Use matched flanges of adequate diameter and ensure the arbor hole fits without forcing.