Norton 66253262719 Surface Grinding Wheel 12in 60 Grit

Product Description

The NORTON 66253262719 is a Type 1 vitrified aluminum oxide surface grinding wheel engineered for precision stock removal on ferrous metals and superalloys. Measuring 12 inches in diameter, 1 inch thick, with a 5-inch arbor hole, this wheel carries a 60-grit, K-hardness (medium) rating in the 38A series. The vitrified bond delivers consistent cutting action and free-cutting performance across a range of material hardnesses. Rated to a maximum of 2070 RPM, it is suited for surface grinders and cylindrical grinders operating at controlled spindle speeds. Wheel weight is 7.973 pounds. Installation and dressing should be performed by a qualified machine operator or tool and die technician.

This wheel is designed for use on soft carbon steels, tool steels, and superalloys in production and job-shop environments. It is compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines equipped with a 5-inch arbor. The 38A aluminum oxide formulation is semi-friable, meaning the abrasive fractures under load to expose fresh cutting edges, which helps maintain cut rate and reduces heat buildup during extended grinding passes on heat-sensitive workpiece materials.

Key Features

• 38A semi-friable aluminum oxide abrasive for consistent, free-cutting action
• Vitrified bond provides rigidity and dimensional stability during grinding
• 60 grit, K hardness (medium grade) balances material removal rate with surface finish
• Type 1 straight-wheel profile fits standard surface and cylindrical grinder spindles
• Non-porous, non-tapered, no-recess construction for uniform wheel balance
• Rated to 2070 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines equipped with a 5-inch arbor. Suitable for grinding soft carbon steels, tool steels, and superalloys per the manufacturer specification 38A60-KVBE.

Installation Notes

Mounting and dressing of grinding wheels must be performed by a trained operator following ANSI B7.1 safety standards. Power down and lock out the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the 2070 RPM maximum speed rating. Flanges, blotters, and arbor hardware must be in serviceable condition and properly sized for a 5-inch hole before mounting.