Norton 66252940907 Surface Grinding Wheel 100 Grit 7 in

Product Description

The NORTON 66252940907 is a Type 1 surface grinding wheel designed for precision flat-surface grinding on ferrous and non-ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent stock removal and a fine finish on hard and soft carbon steels, stainless steel, tool steels, aluminum, and cast and ductile iron. At 7 inches in diameter and 1/2 inch thick with a 1-1/4 inch arbor hole, it mounts directly to standard surface grinder spindles. Rated to 3,600 RPM, the I-hardness (medium) grade suits a broad range of material hardness levels without glazing prematurely or wearing too quickly.

This wheel is suited for use on CNC cutting tool machines, cylindrical grinders, and surface grinders in production and tool-room environments. The 100-grit, fine-grade specification makes it appropriate for finishing passes and light stock removal on hardened tool steels, 400-series stainless, and gray iron. The porous, vitrified bond structure assists in chip clearance and coolant retention during wet or dry grinding operations. It is a single-wheel package intended for professional machinists, tool and die makers, and maintenance technicians working with precision grinding equipment.

Key Features

• Aluminum oxide abrasive with vitrified bond for consistent cut and form retention
• 100 grit, fine grade (specification: 32A100-IVBE) for finishing and light stock removal
• I-hardness (medium) rating balances wheel life against material compatibility across a wide metal range
• Type 1 flat wheel, no recess, non-tapered — direct drop-in for standard surface grinder spindles
• Porous structure promotes chip clearance and coolant flow during grinding
• Rated at 3,600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Compatible material applications include 400 Series Stainless, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The 1-1/4 inch arbor hole fits standard Type 1 surface grinder spindle configurations.

Installation Notes

Surface grinding wheels must be installed by a qualified machinist or grinding equipment operator following ANSI B7.1 safety standards. Always power down and lock out the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips before installation and perform a ring test to confirm integrity. Never exceed the 3,600 RPM maximum speed rating stamped on the wheel or listed in the product documentation.