Norton 66252940207 Surface Grinding Wheel 46 Grit 7in

Product Description

The NORTON 66252940207 is a Type 1 surface grinding wheel engineered for aggressive material removal on hard ferrous metals and exotic alloys. It measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. The wheel uses a ceramic abrasive grain bonded in a vitrified bond matrix, rated at 46 grit coarse grade with an I hardness code (medium hardness rating). It is semi-friable, meaning the grain self-sharpens under load to maintain cut rate and reduce heat buildup. Rated to a maximum of 3600 RPM, it is suited for production grinding environments where consistent stock removal is required.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. It performs across a broad range of demanding materials including 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The ceramic abrasive construction makes it particularly well-suited for applications where conventional aluminum oxide wheels wear too quickly or generate excess heat on sensitive workpiece materials. It is identified under the Norton series specification 5SG46-IVS and carries the porous structure designation for improved coolant flow and chip clearance during wet or dry grinding operations.

Key Features

• Type 1 flat wheel profile with no recess for straightforward surface grinding applications
• Ceramic abrasive grain with semi-friable characteristics for consistent self-sharpening behavior
• Vitrified bond provides rigidity and thermal stability at operating speeds
• 46 grit coarse grade removes stock efficiently on hard and difficult-to-grind materials
• Porous wheel structure supports coolant flow and chip evacuation
• Blue wheel color consistent with Norton 5SG ceramic series identification

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines requiring a 1-1/4 inch arbor hole and a 7-inch diameter Type 1 wheel. Material applications include 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified machinist or tool and die technician familiar with ANSI B11 and OSHA 1910.215 grinding safety standards. Always inspect the wheel for cracks or chips using the ring test before mounting, and confirm the machine spindle speed does not exceed the 3600 RPM maximum rated speed. Power down and lock out the machine before changing wheels. Never exceed the rated RPM, and always use the appropriate wheel guards and flanges as specified by the grinder manufacturer.