Norton 66253262281 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253262281 is a Type 1 straight surface grinding wheel engineered for precision stock removal on ferrous metals. Built with aluminum oxide abrasive in a vitrified bond, this wheel delivers consistent cut rates and good form-holding under the load conditions typical of surface and cylindrical grinding operations. At 12 inches in diameter, 3/4 inches thick, and bored to a 3-inch arbor hole, it mounts directly to production surface grinders without modification. The 46-grit coarse grade removes material aggressively, while the J hardness code keeps the wheel from glazing on softer workpieces. Maximum operating speed is rated at 2070 RPM.

This wheel is suited for grinding soft carbon steels, tool steels, and super alloys in job-shop and production environments. Typical applications include surface grinding flat stock, reconditioning tool steel blanks, and finish passes on alloy components where a consistent scratch pattern is required. The white aluminum oxide abrasive is semi-friable, meaning it self-sharpens during use, reducing heat buildup and the risk of workpiece burn on heat-sensitive materials. It is intended for use by machinist trades operating CNC cutting tool machines, cylindrical grinders, and surface grinders.

Key Features

• 46-grit coarse aluminum oxide abrasive for aggressive stock removal
• J hardness (medium) vitrified bond resists glazing on soft carbon and tool steels
• Semi-friable grain continuously self-sharpens to reduce heat at the grind zone
• Type 1 straight profile with no recess — mounts flat to standard surface grinder spindles
• Non-tapered, non-porous construction for uniform wheel face contact
• Specification designation 38A46-JVBE for direct OEM and shop cross-reference

Compatibility

Designed for use with CNC cutting tool machines, cylindrical grinders, and surface grinders. Suitable for grinding soft carbon steels, tool steels, and super alloys. Confirm spindle arbor bore, flange clearance, and maximum RPM rating against machine specifications before mounting.

Installation Notes

Grinding wheel installation must be performed by a qualified machinist following ANSI B11.9 and OSHA 1910.215 wheel-mounting guidelines. Power down and lock out the grinder before removing the existing wheel. Always perform a ring test by tapping the wheel lightly — a clear tone indicates no cracks; a dull thud means discard the wheel. Do not exceed the 2070 RPM maximum operating speed stamped on this wheel, and use properly sized blotters and flanges as specified by the machine manufacturer.