Norton 66253364240 Surface Grinding Wheel 46 Grit 14 in

Product Description

The NORTON 66253364240 is a Type 1 surface grinding wheel engineered for precision material removal on ferrous metals and high-performance alloys. Built around an aluminum oxide abrasive in a vitrified bond matrix, this wheel delivers consistent stock removal and a predictable wear pattern. At 46 grit with a J hardness code (medium), it is classified as a coarse-grade wheel suited for aggressive cutting passes where surface finish is secondary to material throughput. It weighs 17.19 pounds and is rated to a maximum of 1800 RPM. Licensed tradespeople operating surface grinders, cylindrical grinders, and CNC cutting tool machines are the primary installers and users of this wheel.

This wheel is designed for grinding soft carbon steels, tool steels, and super alloys on dedicated grinding equipment. At 14 inches in diameter, 1-1/2 inches thick, with a 5-inch arbor hole, it fits larger-capacity surface grinders and cylindrical grinding machines commonly found in machine shops, tool-and-die operations, and industrial maintenance environments. The 38A series aluminum oxide abrasive is semi-friable, meaning it fractures under load to continually expose fresh cutting edges, helping maintain cut rate without excessive heat buildup in the workpiece.

Key Features

• Type 1 flat wheel profile with no recess for straightforward mounting on compatible spindle arbors
• 46 grit coarse grade for high material removal rates on steels and super alloys
• Aluminum oxide abrasive (38A series) with semi-friable structure for self-sharpening performance
• Vitrified bond provides rigidity and coolant compatibility for wet or dry grinding applications
• J hardness (medium) rating balances wheel life against free-cutting action on softer workpiece materials
• Non-porous, non-tapered construction for uniform contact across the full wheel face

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. Fits spindles requiring a 5-inch arbor hole on machines rated to accept a 14-inch diameter Type 1 wheel at or below 1800 RPM.

Installation Notes

Mounting and dressing of grinding wheels should be performed by qualified personnel following ANSI B11.9 and applicable OSHA standards for abrasive wheel machinery. Always verify that the machine spindle speed does not exceed the 1800 RPM maximum marked on the wheel before mounting. Power down and lock out the grinder completely before changing wheels. Inspect the wheel for cracks or chips using the ring test before installation, and perform a supervised free-spin safety run after mounting and guarding are confirmed.