Norton 66252939459 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252939459 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 operates at a maximum of 3600 RPM and delivers consistent cut rates on materials that wear out conventional aluminum oxide wheels quickly. At 7 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole, it mounts directly to standard surface grinder and cylindrical grinder spindles. The 60 grit, I hardness (medium grade) combination balances cut speed with wheel life on demanding applications including tool steels, stainless, and superalloys.

This wheel is suited for precision surface grinding, cylindrical grinding, and CNC cutting tool machine operations in both job shop and production environments. It performs well on 400 Series stainless steel, hard carbon steels, tool steels, titanium, superalloys, cast iron, ductile iron, and gray iron. The semi-friable ceramic grain continuously self-sharpens under load, which helps maintain a free-cutting action and reduces heat buildup at the workpiece surface. Machinists and toolroom grinders in industrial and maintenance settings will find this wheel a direct fit for high-precision finishing passes as well as heavier roughing cuts.

Key Features

• Ceramic abrasive grain with semi-friable construction for consistent self-sharpening under load
• Vitrified bond provides rigidity and porosity for efficient chip clearance and coolant penetration
• 60 grit, I hardness (medium grade) balances material removal rate and wheel longevity
• Rated to 3600 RPM maximum operating speed
• Porous wheel structure reduces heat transfer to the workpiece
• Series 5SG Type 1 specification (5SG60-IVS), blue wheel color for easy grade identification

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for grinding 400 Series stainless steel, hard carbon steels, tool steels, titanium, superalloys, cast iron, ductile iron, and gray iron. Standard 1-1/4 inch arbor hole fits common spindle configurations on these machine types.

Installation Notes

Grinding wheel mounting and dressing must be performed by a qualified machinist or grinding machine operator following ANSI B7.1 safety standards. Always ring-test the wheel for cracks or damage before mounting, and never exceed the rated maximum RPM of 3600. Power down and lock out the machine before changing wheels. Dress the wheel face with an appropriate diamond or rotary dresser before initial use to true the wheel and open the grain structure.