Norton 66252941175 Surface Grinding Wheel 120 Grit 7 in

Product Description

The NORTON 66252941175 is a Type 1 vitrified aluminum oxide surface grinding wheel built for precision stock removal and finishing on ferrous and high-performance materials. The wheel measures 7 inches in diameter by 1/2 inch thick with a 1-1/4 inch arbor hole. It runs at a maximum of 3600 RPM and carries a 120-grit, fine-grade abrasive rated at hardness code K. The 38A aluminum oxide grain is semi-friable, meaning it fractures under load to expose fresh cutting edges, which helps maintain cut rate without excessive heat buildup on the workpiece. Weighing approximately 1.59 pounds, the wheel is compact enough for bench and surface grinding machines used in tool rooms and production shops.

This wheel is suited for grinding soft carbon steels, tool steels, and super alloys. It is designed for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. The vitrified bond provides a rigid, porous-free structure that holds abrasive grains firmly during high-precision passes, making it a dependable choice for flat surface work, sharpening HSS tooling, and finishing hardened steel components in both job shop and production environments.

Key Features

• 120-grit, fine-grade aluminum oxide abrasive for smooth surface finishes on ferrous materials
• Semi-friable 38A grain continuously self-dresses to sustain cut efficiency and reduce glazing
• Vitrified bond provides rigid grain retention and consistent geometry throughout wheel life
• Type 1 flat wheel profile with no recess — straightforward mounting on standard arbors
• Rated to 3600 RPM maximum for safe operation on compatible surface and cylindrical grinders
• White wheel color allows easy visual inspection for contamination or loading between uses

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Material applications include soft carbon steels, tool steels, and super alloys. Fits machines accepting a 1-1/4 inch arbor hole with a Type 1 wheel configuration.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or grinding machine operator following ANSI B11.9 and OSHA 1910.215 guidelines. Always inspect the wheel for cracks or chips before mounting and perform a ring test per standard procedure. Power down and lock out the machine before installing or removing the wheel. Never exceed the 3600 RPM maximum speed rating stamped on the wheel or listed in this specification.