Norton 66252940527 Surface Grinding Wheel 80 Grit 7 in

Product Description

The NORTON 66252940527 is a Type 1 surface grinding wheel designed for precision material removal on ferrous metals and hard alloys. Built with a ceramic abrasive grain and vitrified bond, it delivers consistent stock removal and long wheel life in demanding shop environments. The wheel measures 7 inches in diameter, 0.5 inches thick, with a 1-1/4 inch arbor hole. Rated at a maximum of 3,600 RPM, it carries an I hardness code (medium grade) and 80 grit, making it a practical choice for moderate material removal on hardened work. Licensed machinists and grinding specialists install and dress this wheel type.

This wheel is suited for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. Documented material applications include 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The semi-friable ceramic grain continuously self-sharpens under load, maintaining cut rate without excessive heat buildup. The porous, vitrified bond structure allows coolant penetration and chip clearance, which is especially useful in tight-tolerance surface grinding passes.

Key Features

• Ceramic abrasive grain — semi-friable, self-sharpening under load
• Vitrified bond with porous structure for coolant flow and chip clearance
• 80 grit, I hardness (medium grade) for moderate stock removal
• Type 1 straight wheel, no recess, no taper
• Maximum operating speed: 3,600 RPM
• Blue wheel color consistent with 5SG series identification

Compatibility

Compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines accepting a 7 inch diameter, 1/2 inch wide Type 1 wheel with a 1-1/4 inch arbor hole. Documented for use on 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron workpieces. Series specification: 5SG80-IVSP.

Installation Notes

Installation must be performed by a qualified machinist or grinding technician. Power down and lock out the grinder before mounting or removing any wheel. Inspect the wheel for cracks or chips using a ring test before mounting — do not install a damaged wheel. Operate within the stated maximum RPM; exceeding the rated speed is a safety hazard. Always dress the wheel before the first grinding pass on a new mount.