Norton 66252942304 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252942304 is a Type 1 surface grinding wheel engineered for demanding material removal on hard ferrous and exotic alloys. Built with ceramic abrasive grain in a vitrified bond, this wheel delivers consistent cut rates and long service life under high-load grinding conditions. It measures 7 inches in diameter, 3/4 inches thick, with a 1-1/4 inch arbor hole. At 46 grit and I hardness (coarse grade, medium hardness rating), it is well matched for aggressive stock removal rather than fine finishing. Maximum operating speed is 3600 RPM. Installation and operation are performed by machining professionals and tool-room technicians on appropriate guarded grinding equipment.

This wheel is rated for use on 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Compatible grinding equipment includes surface grinders, cylindrical grinders, and CNC cutting tool machines. The semi-friable ceramic grain self-sharpens during use, reducing glazing and maintaining cut efficiency across extended runs on difficult workpiece materials. It is suitable for both production and toolroom environments where material hardness demands a wheel that holds its edge without frequent dressing.

Key Features

• Ceramic abrasive grain — semi-friable for consistent self-sharpening and reduced glazing
• Vitrified bond provides rigidity and open structure for free cutting action
• 46 grit coarse grade suited for high stock-removal passes
• I hardness code (medium hardness rating) balances wheel life against cut rate
• Porous structure promotes coolant flow and chip clearance during wet or dry grinding
• Rated for stainless, tool steels, titanium, super alloys, cast iron, and ductile iron

Compatibility

Rated 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 5SG Type 1.

Installation Notes

Grinding wheel installation must be performed by qualified personnel following ANSI B11.9 and applicable shop safety standards. Always ring-test the wheel for cracks before mounting and confirm the machine spindle speed does not exceed the 3600 RPM rating marked on the wheel. The machine guard must be in place and properly adjusted before powering the grinder. Never force a wheel onto a spindle or use an adapter that alters the specified arbor bore.