Norton 66252939467 Surface Grinding Wheel 7in 100 Grit

Product Description

The NORTON 66252939467 is a Type 1 surface grinding wheel engineered for precision stock removal on hard ferrous metals and specialty alloys. Built with a ceramic abrasive grain and vitrified bond in the 5SG series, it delivers consistent cut rates and extended wheel life on demanding applications. The wheel measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. Rated at a maximum of 3600 RPM and coded J hardness (medium), it is suited for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. Licensed grinding technicians and tool-and-die shops are the primary installers and operators.

This wheel is designed for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Its fine-grade, 100-grit ceramic abrasive makes it a strong fit for finish grinding passes where surface finish consistency matters. The semi-friable grain structure allows controlled breakdown to expose fresh cutting edges during use, which is especially useful on heat-sensitive materials like titanium and high-alloy steels. It is a single-wheel package intended for professional shop use.

Key Features

• Ceramic abrasive grain with vitrified bond for aggressive, cool cutting action
• 100 grit, fine grade for controlled surface finish on ferrous and specialty metals
• J hardness (medium) rating balances wheel life and free cutting behavior
• Semi-friable grain structure exposes fresh abrasive as the wheel wears
• Porous wheel construction promotes coolant flow and heat dissipation
• Type 1 flat wheel profile with no recess — direct-mount to standard arbor flanges

Compatibility

Rated for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable 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 operator following ANSI B11.9 and OSHA 29 CFR 1910.215 general industry grinding standards. Always ring-test the wheel before mounting and confirm the machine spindle speed does not exceed the 3600 RPM maximum rating stamped on the wheel. Power down and lock out the grinder before changing wheels. Never exceed the rated RPM, and always use properly sized flanges and a blotter between the flange and wheel face.