Norton 66252835765 Surface Grinding Wheel 220 Grit 6in

Product Description

The NORTON 66252835765 is a Type 1 surface grinding wheel engineered for precision material removal on soft carbon steels, tool steels, and super alloys. Built with white aluminum oxide abrasive and a vitrified bond, it delivers consistent, controlled stock removal at a maximum operating speed of 4140 RPM. The wheel measures 6 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole, and weighs 0.58 pounds. At 220 grit with a K hardness rating, it falls in the very fine grade range, making it well suited for finishing passes and tight-tolerance surface work. This part carries the specification designation 38A220-KV and uses a semi-friable abrasive grain for self-sharpening performance.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in both production and maintenance shop environments. It is a standard choice for tool room technicians and machinist trades working with soft carbon steels, tool steels, and super alloys where surface finish quality and dimensional accuracy are critical. The Type 1 flat wheel profile with no recess and no taper makes it straightforward to mount on standard arbor spindles and compatible with a wide range of pedestal and precision surface grinding setups.

Key Features

• White aluminum oxide abrasive material rated semi-friable for consistent self-sharpening action
• Vitrified bond construction provides rigidity and porosity for effective coolant and chip clearance
• 220 grit, very fine grade delivers smooth surface finishes and precise stock removal
• K hardness code indicates medium wheel hardness suited for softer workpiece materials
• Rated at 4140 RPM maximum operating speed for safe use on standard surface and cylindrical grinder spindles
• No recess, no taper Type 1 profile simplifies mounting and balancing

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for material applications including soft carbon steels, tool steels, and super alloys. Part of the Norton 38A Type 1 series.

Installation Notes

Grinding wheel installation should be performed by a qualified machinist or grinding equipment operator following ANSI B11.9 and OSHA 29 CFR 1910.215 safety standards. Always power down and lock out the machine before mounting or removing the wheel. Inspect the wheel for cracks or chips using a ring test before installation, and never exceed the rated maximum RPM of 4140. Use appropriate flanges and blotters as specified by the machine manufacturer and ANSI standards.