Norton 66253262501 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253262501 is a Type 1 surface grinding wheel engineered for heavy stock removal on ferrous metals and difficult-to-grind alloys. Built on a ceramic abrasive grain with a vitrified bond, it delivers consistent cut rate and form retention across extended production runs. The wheel measures 12 inches in diameter, 1 inch thick, with a 3-inch arbor hole. It carries a J hardness code, placing it in the medium hardness range, and a 46-grit coarse grade suited for aggressive material removal rather than finishing. Maximum operating speed is 2070 RPM. The blue, porous, semi-friable structure promotes cool cutting and resists loading under heavy infeed conditions.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in shop and production environments. Listed material applications include 400 Series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. It is appropriate for both job-shop and high-volume machining operations where consistent wheel life and dimensional control are required. The 5SG Type 1 series designation identifies it as part of a vitrified ceramic line built for precision grinding of tough materials.

Key Features

• Ceramic abrasive grain with vitrified bond for high cut rate and extended wheel life
• 46 grit coarse grade for aggressive stock removal on hard and abrasion-resistant alloys
• J hardness code (medium) balances wheel breakdown rate with workpiece support
• Porous, semi-friable structure promotes cool cutting and reduces loading
• Type 1 flat wheel profile with no recess, compatible with standard surface and cylindrical grinder flanges
• Rated to 2070 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding 400 Series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Series designation is 5SG Type 1 with specification code 5SG46-JVS.

Installation Notes

Grinding wheel mounting must be performed by qualified personnel following ANSI B7.1 safety standards for abrasive wheel use, handling, and guarding. Always perform a ring test before mounting and confirm the machine spindle speed does not exceed the 2070 RPM maximum marked on the wheel. Guard clearances and flange conditions must be inspected prior to installation. Never exceed the rated operating speed and ensure the arbor bore fits the spindle without forcing.