Norton 66252942308 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252942308 is a Type 1 surface grinding wheel engineered for demanding material removal on ferrous metals and specialty alloys. Built with a ceramic abrasive grain and vitrified bond, this wheel delivers consistent stock removal and long wheel life compared to conventional aluminum oxide alternatives. It measures 7 inches in diameter, 3/4 inches thick, with a 1-1/4 inches arbor hole. The 60 grit, K hardness (medium grade) specification balances aggressive cutting action with controlled surface finish. Rated to 3600 RPM maximum, it is suited for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. Licensed trades and precision grinding shops rely on this wheel for production and toolroom work.

This grinding wheel is designed for material removal on 400 Series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Its semi-friable ceramic grain continuously self-sharpens under load, maintaining cut rate across the wheel's service life. Typical applications include flat surface grinding on surface grinder chucks, OD grinding on cylindrical grinders, and tool relief grinding on CNC equipment. The porous, vitrified structure promotes coolant flow and chip clearance, reducing heat buildup in the workpiece — a critical factor when grinding heat-sensitive alloys such as titanium and stainless steel.

Key Features

• Ceramic abrasive grain with vitrified bond for long service life and consistent cut rate
• 60 grit, K hardness (medium grade) for aggressive stock removal with controlled finish
• Semi-friable grain structure continuously self-sharpens during use
• Porous wheel construction promotes coolant penetration and chip clearance
• 3600 RPM maximum operating speed rating
• No recess, no taper — standard Type 1 straight wheel geometry

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines requiring a 7 inches diameter, 1-1/4 inches arbor hole, Type 1 straight wheel. Suitable for grinding 400 Series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. Series designation: 5SG Type 1, specification 5SG60-KVS.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or grinding equipment operator following ANSI B11.9 and OSHA 29 CFR 1910.215 standards. Before mounting, inspect the wheel for cracks using the ring test — tap the wheel gently; a dull thud indicates a cracked wheel that must not be used. Always ensure the machine spindle speed does not exceed the 3600 RPM maximum marked on the wheel, and use flanges and blotters appropriate for the arbor hole diameter. Dress the wheel with a suitable diamond dresser after mounting to true the face before beginning grinding operations.