Norton 66252940201 Surface Grinding Wheel 80 Grit 7in

Product Description

The NORTON 66252940201 is a Type 1 surface grinding wheel built for precision material removal on hard ferrous metals and exotic alloys. Measuring 7 inches in diameter and 1/2 inch thick with a 1-1/4 inch arbor hole, this wheel uses a ceramic abrasive grain in a vitrified bond matrix. Rated to 3600 RPM, the J hardness code and medium grade classification give it the right balance of cut rate and wheel life for surface grinding applications. The semi-friable ceramic grain continuously micro-fractures during use, exposing fresh cutting edges without requiring frequent dressing cycles.

This wheel is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. It performs on 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Typical users include tool-and-die shops, machine shops, and industrial maintenance professionals who require consistent stock removal and surface finish control on demanding materials. The porous structure of the wheel promotes coolant flow and chip clearance during wet or dry grinding operations.

Key Features

• Ceramic abrasive grain with semi-friable character for continuous self-sharpening action
• Vitrified bond for rigidity and dimensional stability under load
• J hardness (medium grade) balances wheel life with cut aggressiveness
• 80 grit for moderate stock removal with acceptable surface finish
• Porous wheel structure aids coolant penetration and swarf evacuation
• Type 1 straight wheel profile fits standard surface and cylindrical grinder flanges

Compatibility

Compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines accepting a 7 inch diameter, 1/2 inch thick, Type 1 wheel with a 1-1/4 inch arbor hole. Suitable for grinding 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron workpieces.

Installation Notes

Installation should be performed by a qualified machine operator or maintenance technician following the grinder manufacturer's wheel-mounting procedures. Always de-energize and lock out the machine before mounting or removing a grinding wheel. Verify that the machine's rated spindle speed meets or stays below the 3600 RPM maximum marked on the wheel — never exceed the wheel's maximum RPM rating. Inspect the wheel for cracks or chips before mounting and perform a ring test; discard any wheel that does not emit a clear tone.