Norton 66253263143 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253263143 is a Type 1 surface grinding wheel designed for heavy-stock removal on a wide range of ferrous and non-ferrous metals. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent cut rate and long wheel life under production grinding conditions. The wheel measures 12 inches in diameter, 1-1/2 inches thick, with a 3-inch arbor hole. At 46 grit with an H hardness code and coarse grade, it is suited for aggressive material removal where surface finish is secondary to stock removal rate. Licensed machinists and grinding technicians are the primary installers and operators of this wheel.

This wheel is rated for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. It is well matched to applications involving 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The Series 32A Type 1 designation indicates a straight wheel profile with no recess and no taper, making it compatible with standard surface grinding spindles that accept a 3-inch bore. It is suited for both job shop and production floor environments where consistent, repeatable grinding performance is required.

Key Features

• Aluminum oxide abrasive for effective grinding of ferrous and non-ferrous metals
• Vitrified bond provides rigidity and consistent stock removal rate
• 46 grit coarse grade for aggressive material removal applications
• H hardness code with porous structure aids coolant flow and chip clearance
• Type 1 straight wheel profile with no recess and no taper for standard spindle mounting
• Maximum rated speed of 2070 RPM — do not exceed this value

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines requiring a 12-inch diameter, 3-inch arbor hole Type 1 grinding wheel. Compatible material applications include 400 series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

Installation and wheel changes must be performed by a qualified machinist or grinding technician with the machine fully powered down and locked out per OSHA lockout/tagout procedures. Always perform a ring test before mounting to check for cracks. Mount the wheel using proper flanges and blotters sized to the arbor; never force a wheel onto a spindle. Confirm the machine spindle speed does not exceed the 2070 RPM maximum rating marked on the wheel before operation.