Norton 66252940198 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252940198 is a Type 1 straight surface grinding wheel built for demanding material removal on hard ferrous metals and specialty alloys. It measures 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. The wheel uses a ceramic abrasive grain with a vitrified bond, delivering a medium-grade, semi-friable cutting action that fractures to expose fresh cutting edges under load. Rated to 3600 RPM, it is suited for precision surface grinding work where consistent stock removal and wheel life are both priorities. Wheel color is blue, consistent with the 5SG series designation.

This wheel is intended for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in professional machine shop and industrial maintenance environments. Material applications include 400 series stainless steel, hard carbon steels, tool steels, titanium, super alloys, cast iron, ductile iron, and gray iron. It is a go-to choice for toolroom technicians and grinding machine operators working with difficult-to-grind materials that rapidly wear conventional aluminum oxide wheels.

Key Features

• Ceramic abrasive grain with vitrified bond for aggressive, consistent stock removal
• Semi-friable grain structure self-sharpens under load, reducing glazing
• 60 grit, K hardness (medium grade) balances cut rate and wheel longevity
• Rated at 3600 RPM maximum operating speed
• No recess, no taper — standard Type 1 straight wheel geometry
• Porous wheel structure promotes coolant flow and chip clearance

Compatibility

Designed 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 per supplier data. Series designation is 5SG Type 1, specification code 5SG60-KVS.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machine operator or toolroom technician following ANSI B11.9 and OSHA 29 CFR 1910.215 standards. Always inspect the wheel for cracks or chips before mounting — ring test per ANSI guidelines. Power down and de-energize the grinder before changing wheels, and confirm the machine spindle speed does not exceed the 3600 RPM maximum rating stamped on the wheel. Use appropriate flanges and a blotter on each side of the wheel during mounting; never over-tighten the arbor nut.