Norton 66252939465 Surface Grinding Wheel 80 Grit 7in

Product Description

The NORTON 66252939465 is a Type 1 surface grinding wheel engineered for precision stock removal on ferrous and hard-to-grind alloys. It features a ceramic abrasive grain with a vitrified bond, which provides consistent cut rates and long wheel life under continuous grinding loads. The wheel measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. At 80 grit and L hardness (medium grade), it delivers an aggressive yet controlled cut. Maximum operating speed is 3,600 RPM. This wheel is installed by machinists and grinding specialists working in tool and die, aerospace, and general metalworking applications.

This wheel is suited for surface grinders, cylindrical grinders, and CNC cutting tool machines. It is specifically formulated for difficult materials including 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. The porous, semi-friable ceramic grain structure keeps the wheel cooler and self-sharpening during cut, making it appropriate for both light finishing passes and heavier material removal cycles on hardened workpieces.

Key Features

• Ceramic abrasive grain with vitrified bond for consistent cut rate and extended wheel life
• 80 grit, L hardness (medium grade) for aggressive material removal on hard alloys
• Porous, semi-friable structure reduces heat buildup and promotes self-sharpening
• Type 1 flat wheel geometry with no recess, compatible with standard surface grinder spindles
• Rated to 3,600 RPM maximum operating speed
• Blue wheel color; series designation 5SG Type 1

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Formulated for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Arbor hole size of 1-1/4 inches fits standard surface grinder spindles accepting that bore diameter.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or grinding specialist. Always verify the machine spindle speed does not exceed the wheel's 3,600 RPM rating before mounting. Inspect the wheel for cracks or chips using the ring test before installation, and never use a damaged wheel. Follow ANSI B11.9 and OSHA 29 CFR 1910.215 guarding requirements for abrasive wheel machinery.