Norton 66253202926 Surface Grinding Wheel 46 Grit 12in

Product Description

The NORTON 66253202926 is a Type 1 surface grinding wheel built for demanding material removal on ferrous metals and hard-to-grind alloys. It measures 12 inches in diameter, 1-1/2 inches thick, with a 5-inch arbor hole. The abrasive is ceramic grain bonded in a vitrified matrix, rated at a J hardness code (medium) with a coarse 46-grit cut. Maximum operating speed is 2,070 RPM. The porous, semi-friable structure promotes cool cutting and free abrasive breakdown, making this wheel a practical choice for precision surface grinding applications where heat and wheel loading are concerns. Licensed trade professionals and toolroom machinists are the primary installers.

This wheel is suited for surface grinders, cylindrical grinders, and CNC cutting tool machines in both production and toolroom environments. Typical applications include grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Its ceramic abrasive construction handles the elevated hardness and toughness of these materials without the rapid glazing common in aluminum oxide wheels. The 5SG Type 1 series designation confirms it is a straight, flat-faced wheel with no recess.

Key Features

• Ceramic abrasive grain for aggressive, cool cutting on hard and exotic metals
• Vitrified bond provides rigidity and consistent form-holding during surface grinding
• Porous, semi-friable structure reduces heat buildup and wheel loading
• 46 grit, J hardness (medium) for coarse stock removal with controlled surface finish
• Type 1 straight wheel profile with no recess, no taper — direct mount on standard flanges
• Rated to 2,070 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.

Installation Notes

Grinding wheel mounting must be performed by a qualified operator following ANSI B11.9 and OSHA 1910.215 guarding requirements. Always ring-test the wheel before mounting and inspect for cracks or chips. Power down the grinder and lock out the machine before changing wheels. Never exceed the maximum RPM stamped on the wheel or listed in the specifications — overspeed is a critical safety hazard.