Norton 66253262703 Surface Grinding Wheel 46 Grit 12 in

Product Description

The NORTON 66253262703 is a Type 1 surface grinding wheel engineered for precision stock removal on ferrous metals and specialty alloys. Built from aluminum oxide abrasive in a vitrified bond matrix, this wheel delivers consistent cutting action and thermal stability under sustained grinding loads. It measures 12 inches in diameter, 1 inch thick, with a 5 inch arbor hole, and is rated to a maximum of 2070 RPM. The 46 grit, coarse-grade construction with an I hardness code (medium) makes it well suited for aggressive material removal where surface finish is secondary to throughput. Semi-friable grain structure allows controlled fracturing to expose fresh cutting edges during the grind cycle.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in professional shop environments. It is appropriate for grinding soft carbon steels, tool steels, and super alloys. The 38A series designation identifies this as a NORTON aluminum oxide formulation commonly specified in toolroom and production grinding applications where consistent wheel behavior across materials is required. Typically installed and dressed by a machinist or tool grinder familiar with wheel speed ratings and ANSI mounting standards.

Key Features

• Aluminum oxide abrasive with vitrified bond for thermal stability and consistent cut rate
• 46 grit coarse grade suited for high stock removal on ferrous and super alloy workpieces
• I hardness (medium) and semi-friable grain for self-sharpening behavior during use
• Type 1 straight wheel profile with no recess, compatible with standard surface and cylindrical grinder flanges
• White wheel color allows visual wear monitoring during the grinding cycle
• Non-porous bond structure maintains wheel integrity across a range of coolant and dry grinding conditions

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. Verify that the spindle speed of the host machine does not exceed the 2070 RPM maximum rating of this wheel before mounting.

Installation Notes

Wheel mounting must be performed by a qualified machinist following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always inspect the wheel for cracks or chips using the ring test before mounting, and power down and lock out the machine before any wheel change. Use properly sized flanges and a blotter on each flange face; never exceed the 2070 RPM maximum speed rating. After mounting, run the wheel at operating speed with the guard in place for at least one minute before bringing it into contact with a workpiece.