Norton 66252939826 Surface Grinding Wheel 100 Grit 7 in

Product Description

The NORTON 66252939826 is a Type 1 surface grinding wheel engineered for precision stock removal and finishing on a range of metallic workpieces. Built around white aluminum oxide abrasive in a vitrified bond matrix, this wheel delivers consistent cutting action with a fine, 100-grit surface finish. The J hardness code and semi-friable grain structure allow the wheel to self-dress at moderate intervals, keeping the cutting face open and reducing heat buildup. Rated to 3600 RPM, the wheel measures 7 inches in diameter, 1/4 inch thick, and carries a 1-1/4 inch arbor hole. Weighing approximately 0.79 pounds, it is a direct-mount, no-recess, non-tapered design.

This wheel is intended for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in professional shop environments. Material applications include soft carbon steels, tool steels, and super alloys where a fine finish and controlled material removal are required. The 38A series designation identifies it as a standard aluminum oxide formulation suitable for light-to-medium grinding passes in both production and toolroom settings. It is sold individually with a minimum order quantity of one.

Key Features

• White aluminum oxide abrasive with semi-friable grain for consistent self-dressing action
• Vitrified bond provides rigidity and dimensional stability during surface grinding
• 100 grit, fine grade for controlled stock removal and smooth surface finishes
• J hardness code rated as medium, well-suited for soft carbon steels and super alloys
• Non-porous, no-recess, non-tapered Type 1 profile for straightforward spindle mounting
• 3600 RPM maximum speed rating for standard surface and cylindrical grinding machines

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. Fits spindles accepting a 1-1/4 inch arbor hole.

Installation Notes

Installation should be performed by a qualified machinist or grinding machine operator with the machine fully de-energized and locked out before mounting. Inspect the wheel for cracks or chips before installation and conduct a ring test per ANSI B7.1 guidelines. Never exceed the 3600 RPM maximum speed rating stamped on the wheel. Run the wheel under guard at operating speed for at least one minute before engaging the workpiece.