Norton 66252940194 Surface Grinding Wheel 46 Grit 7in

Product Description

The NORTON 66252940194 is a Type 1 surface grinding wheel engineered for aggressive stock removal on hard ferrous metals and specialty alloys. Built with a ceramic abrasive grain and a vitrified bond, this wheel delivers consistent cutting action and thermal resistance under high-cycle surface and cylindrical grinding conditions. At 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole, it mounts directly to standard surface grinder spindles. The 46-grit coarse grade and J hardness code target applications where fast material removal takes priority over fine surface finish. Maximum operating speed is 3,600 RPM.

This wheel is suited for production and job-shop grinding of 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The 5SG ceramic grain is semi-friable, meaning it fractures under load to expose fresh cutting edges, making it especially effective on hard, heat-sensitive materials that would glaze or burn under conventional aluminum oxide wheels. It is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in both light industrial and heavy production environments.

Key Features

• Ceramic abrasive grain with vitrified bond for consistent cut rate and wheel life
• 46-grit coarse grade removes material quickly on hard ferrous and exotic alloy workpieces
• J hardness (medium) balances wheel wear against cutting efficiency on tough materials
• Semi-friable grain structure self-sharpens under grinding pressure, reducing heat buildup
• Type 1 straight wheel profile fits standard surface and cylindrical grinder arbors
• Porous structure promotes coolant flow and chip clearance during wet or dry grinding

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines requiring a Type 1 straight wheel with a 1-1/4 inch arbor hole. Suitable for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron workpieces.

Installation Notes

Installation should be performed by a qualified grinding machine operator following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Before mounting, inspect the wheel for cracks or chips using the ring test, and verify that the machine spindle speed does not exceed the 3,600 RPM rating marked on the wheel. Use proper flange hardware and blotter pads to distribute clamping force evenly, and never exceed the rated arbor hole size. Always dress the wheel after mounting and run it under the wheel guard at operating speed for at least one minute before contacting the workpiece.