Norton 66252942800 Surface Grinding Wheel 60 Grit 7in

Product Description

The NORTON 66252942800 is a Type 5 surface grinding wheel designed for stock removal and precision surface finishing on ferrous and non-ferrous metals. Built on a vitrified bond with aluminum oxide abrasive, this wheel measures 7 inches in diameter and 1 inch thick, with a 1-1/4 inch arbor hole. The 32A specification series identifies it as a friable-free, porous aluminum oxide wheel rated at G hardness and 60 grit, suitable for medium-grade material removal. Maximum operating speed is 3,600 RPM. A one-side recess of 1/2 inch depth and 2-3/4 inch diameter accommodates clearance requirements on compatible spindle and hub configurations.

This wheel is suited for use on surface grinders and cylindrical grinders in production and tool-room environments. It is rated for grinding 400 Series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The 60-grit, medium-grade specification positions it as a general-purpose roughing and intermediate finishing wheel for shops working across a broad range of metal types.

Key Features

• Aluminum oxide abrasive, 32A series — suited for steel, stainless, and cast iron applications
• Vitrified bond construction provides rigidity and consistent grit exposure throughout wheel life
• Type 5 recessed wheel with 1/2 inch recess depth and 2-3/4 inch recess diameter for hub clearance
• 60 grit, G hardness (medium grade) — balances stock removal rate with surface finish quality
• Porous structure promotes coolant flow and chip clearance, reducing heat buildup
• Rated to 3,600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders and cylindrical grinders that accept a 7 inch diameter, Type 5 wheel with a 1-1/4 inch arbor hole. Suitable for grinding 400 Series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

Grinding wheel installation and dressing should be performed by a qualified machine operator or toolroom technician following ANSI B11.9 and OSHA 29 CFR 1910.215 guidelines. Before mounting, inspect the wheel for cracks or chips using the ring test. Ensure the machine spindle speed does not exceed the 3,600 RPM maximum rating stamped on the wheel. Power down and lock out the grinder before changing wheels, and allow the wheel to run at operating speed for at least one minute behind a guard before bringing it into contact with the workpiece.