Norton 66253007165 Surface Grinding Wheel 8in 60 Grit

Product Description

The NORTON 66253007165 is a Type 1 surface grinding wheel engineered for precision stock removal on steel workpieces. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent cutting action and thermal stability under continuous grinding loads. The wheel measures 8 inches in diameter by 1/2 inch thick, with a 1-1/4 inch arbor hole, and is rated to 3600 RPM. At 60 grit with an I hardness code and medium grade, it balances aggressive material removal with controlled surface finish. It belongs to the NORTON 32A series, identifiable by its blue color and porous structure that promotes coolant flow and chip clearance during operation.

This wheel is suited for surface grinding and cylindrical grinding applications on hard carbon steels, soft carbon steels, and tool steels. It is compatible with CNC cutting tool machines, cylindrical grinders, and surface grinders in both production shop and tool room environments. The vitrified bond performs reliably across wet and dry grinding setups, making it a practical choice for machinists and tool grinders handling a range of ferrous material grades.

Key Features

• Aluminum oxide abrasive — well-suited for hard and soft carbon steels and tool steels
• Vitrified bond provides rigidity and thermal stability under continuous load
• 60 grit, I hardness (medium grade) balances stock removal rate with surface quality
• Porous wheel structure supports coolant flow and chip evacuation
• Type 1 straight wheel profile — no recess, no taper
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Material applications include hard carbon steels, soft carbon steels, and tool steels as stated by the manufacturer.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or tool room technician. Before mounting, inspect the wheel for cracks or chips using the ring test — do not install a damaged wheel. Power down and lock out the grinder before changing wheels, and confirm the machine spindle speed does not exceed the 3600 RPM maximum rating marked on the wheel. Always use the correct arbor flanges and a proper blotter between flange and wheel face as required by ANSI B11.9 safety standards.