Norton 66252940605 Surface Grinding Wheel 220 Grit

Product Description

The NORTON 66252940605 is a Type 1 surface grinding wheel engineered for precision material removal on soft carbon steels, tool steels, and super alloys. Built with aluminum oxide abrasive in a vitrified bond, this wheel delivers consistent cutting action and dimensional stability under load. At 220 grit with a Very Fine grade and Q hardness code, it is suited for fine finishing passes where surface finish quality matters. The 38A series designation indicates a semi-friable aluminum oxide grain that self-sharpens progressively during use. Licensed trade professionals and skilled machinists install and operate this wheel type.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. The 7-inch diameter and 1/2-inch thickness fit standard machine spindle configurations common in tool and die shops, maintenance facilities, and precision machining environments. The 1-1/4-inch arbor hole accommodates typical spindle sizes on bench and floor-standing grinding equipment. It performs well on applications requiring fine surface finish on hardened and unhardened ferrous materials including tool steels and super alloys.

Key Features

• 220 grit Very Fine grade aluminum oxide abrasive for finish grinding passes
• Vitrified bond provides rigidity and form-holding during precision surface work
• Semi-friable grain structure promotes self-sharpening for consistent cut rate
• Q hardness rating suited for grinding softer and medium-hardness workpiece materials
• Type 1 straight wheel profile with no recess for flat-face grinding applications
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for material applications including soft carbon steels, tool steels, and super alloys per manufacturer specification.

Installation Notes

Grinding wheel installation must be performed by a qualified operator following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Power down and lock out the grinder before changing wheels. Never exceed the maximum rated RPM of 3600; verify the machine spindle speed before operation.