Norton 66252939673 Surface Grinding Wheel 7in 100 Grit

Product Description

The NORTON 66252939673 is a Type 1 surface grinding wheel designed for precision stock removal and finishing on a wide range of ferrous and non-ferrous workpiece materials. Built with aluminum oxide abrasive and a vitrified bond, this wheel delivers consistent cutting action and open structure suited to fine-finish surface grinding applications. It measures 7 inches in diameter, 1/4 inch thick, and carries a 1-1/4 inch arbor hole. The 100-grit, K-hardness (medium) rating makes it appropriate for controlled material removal where surface finish quality matters. Rated to a maximum of 3,600 RPM, it is installed and operated by machinists and tool room technicians on compatible surface grinding equipment.

This wheel is suited for surface grinding operations on 400 Series stainless steel, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. Typical applications include toolroom surface grinders and CNC cutting tool machines as well as cylindrical grinders. The porous, vitrified-bonded construction promotes coolant flow and chip clearance during wet or dry grinding, making it a practical choice for both production and maintenance grinding tasks in industrial and shop environments.

Key Features

• Aluminum oxide abrasive for consistent performance on steel, stainless, and iron workpieces
• Vitrified bond with porous structure aids coolant penetration and chip clearance
• 100 grit, fine grade delivers smooth surface finishes with controlled stock removal
• K hardness (medium) rating balances wheel wear against cutting efficiency
• Type 1 flat wheel profile with no recess — straightforward mounting on standard arbors
• Maximum operating speed of 3,600 RPM

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines requiring a Type 1 wheel with a 1-1/4 inch arbor hole. Compatible material applications include 400 Series stainless steel, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or tool room technician following ANSI B11.9 and applicable shop safety standards. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Ensure the machine spindle speed does not exceed the 3,600 RPM maximum rating marked 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.