Norton 66253246899 Surface Grinding Wheel 46 Grit 12in

Product Description

The NORTON 66253246899 is a Type 7 surface grinding wheel engineered for demanding material removal on ferrous and non-ferrous metals. Built with an aluminum oxide abrasive and vitrified bond, this wheel delivers consistent cut rate and thermal stability under wet grinding conditions. At 46 grit with an I hardness code and medium hardness rating, it sits in the coarse grade range — suited for aggressive stock removal rather than finishing passes. The two-sided recessed profile and 5-inch arbor hole make it a direct fit for standard surface and cylindrical grinder spindle configurations. Rated to 2705 RPM maximum, it weighs 8.4 pounds.

This wheel is intended for use on surface grinders and cylindrical grinders in professional machine shop, toolroom, and industrial maintenance environments. It handles a broad range of materials including 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Both wet operation and high-volume production grinding applications are appropriate uses. The coarse grit makes it particularly effective where rapid material removal is the primary objective and surface finish is secondary.

Key Features

• Aluminum oxide abrasive with vitrified bond for controlled, consistent cut and good form retention
• 46 grit coarse grade delivers aggressive stock removal on a wide range of metals
• Type 7 two-sided recessed wheel profile with 0.5 inch recess depth and 7.5 inch recess diameter
• Wet operation rated — compatible with water-soluble and synthetic coolants
• Rated to 2705 RPM maximum for use on standard surface and cylindrical grinder spindles
• Series 32A Type 7 specification: 46I8V32A

Compatibility

Designed for use with surface grinders and cylindrical grinders requiring a Type 7 wheel with a 5-inch hole, 12-inch diameter, and 2-inch face width. 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

Grinding wheel mounting and dressing should be performed by a qualified machine operator or maintenance technician familiar with ANSI B11.9 and OSHA 29 CFR 1910.215 standards for abrasive wheel machinery. Always inspect the wheel for cracks or chips before mounting and perform a ring test on vitrified wheels. Ensure the machine spindle speed does not exceed the wheel's 2705 RPM maximum before operation. Power down and lock out the grinder before changing wheels, and confirm proper flange, blotter, and arbor nut torque per the machine manufacturer's specifications.