Norton 66253246859 Surface Grinding Wheel 12in 46 Grit

Product Description

The NORTON 66253246859 is a Type 5 vitrified aluminum oxide surface grinding wheel designed for use on surface grinders and cylindrical grinders in professional metalworking applications. The wheel measures 12 inches in diameter and 1.5 inches thick with a 5-inch arbor hole, and runs at a maximum of 2705 RPM. At 46 grit with a K hardness code and coarse grade, this wheel removes material aggressively while maintaining control on a wide range of ferrous and non-ferrous metals. Weighing 8.4 pounds, it is built for production and maintenance grinding environments where consistent stock removal is the priority.

This wheel is suited for professional shops and industrial maintenance operations performing surface and cylindrical grinding on metals including 400 series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The coarse 46-grit aluminum oxide abrasive makes it a practical choice for rapid stock removal passes rather than fine finishing work. It is typically installed and operated by machinists, tool and die makers, and maintenance machinists working with surface grinder or cylindrical grinder setups.

Key Features

• Type 5 recessed wheel with a 7.5-inch recess diameter and 0.5-inch recess depth on one side for clearance in surface grinder setups
• Vitrified bond construction provides rigidity and consistent cut throughout wheel life
• Aluminum oxide abrasive rated for use on stainless steels, carbon steels, tool steels, aluminum, and multiple grades of cast iron
• 46 grit coarse grade delivers aggressive stock removal on hard and tough materials
• K hardness code indicates medium wheel hardness, balancing abrasive retention with friability
• Maximum operating speed of 2705 RPM — do not exceed this rating

Compatibility

Designed for use with surface grinders and cylindrical grinders. 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. Specification code 46K8V32A identifies this wheel within the NORTON 32A Type 5 series.

Installation Notes

Grinding wheel mounting and dressing should be performed by qualified machinists or maintenance personnel familiar with ANSI B11.9 and OSHA 29 CFR 1910.215 safety standards for abrasive wheel machinery. Before mounting, inspect the wheel visually and perform a ring test to check for cracks. Power down and lock out the grinder before changing wheels, and verify that the machine spindle speed does not exceed the 2705 RPM maximum marked on the wheel. Always use the correct flanges and blotters as specified by the wheel and machine manufacturer.