Norton 66252940864 Surface Grinding Wheel 46 Grit

Product Description

The NORTON 66252940864 is a Type 1 surface grinding wheel designed for precision stock removal on ferrous and non-ferrous materials in surface grinding and cylindrical grinding applications. Built with aluminum oxide abrasive and a vitrified bond, this wheel carries a coarse 46 grit rating and an I hardness code, indicating medium wheel hardness. It measures 7 inches in diameter, 1/2 inch thick, and features a 1-1/4 inch arbor hole. Rated to a maximum of 3600 RPM, it suits production environments where consistent cut rate and wheel integrity are required. Licensed machinists, toolroom grinders, and CNC machine operators are the primary installers and users of this wheel type.

This wheel is suited for surface grinder and cylindrical grinder setups in both job shop and production environments. Its coarse grit and aluminum oxide composition make it effective for aggressive material removal on a broad range of workpiece materials. It carries the specification designation 32A46-IVBE, which encodes abrasive type, grit, hardness, structure, and bond for precise wheel selection. The porous, vitrified construction promotes coolant flow and chip clearance, helping to reduce heat buildup during extended grinding passes.

Key Features

• Aluminum oxide abrasive for reliable performance on steels, cast iron, and non-ferrous alloys
• Vitrified bond with porous structure for improved coolant penetration and chip clearance
• 46 grit coarse grade for aggressive stock removal
• I hardness code (medium) provides consistent wheel wear and surface finish balance
• Type 1 flat wheel profile with no recess, compatible with standard surface and cylindrical grinder spindles
• Maximum operating speed of 3600 RPM

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for material applications including 400 Series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Arbor hole size of 1-1/4 inches fits standard spindle configurations for 7-inch Type 1 grinding wheels.

Installation Notes

Grinding wheel mounting must be performed by a qualified operator following ANSI B11.9 and OSHA 29 CFR 1910.215 safety standards. Always perform a ring test before mounting to check for cracks. Mount the wheel between clean, matching flanges with proper blotter paper gaskets, and never exceed the marked maximum RPM. Power down and lock out the grinder before changing wheels.