Norton 66252941048 Surface Grinding Wheel 80 Grit 7 in

Product Description

The NORTON 66252941048 is a Type 1 surface grinding wheel engineered for precision stock removal on soft carbon steels, tool steels, and super alloys. Built on an aluminum oxide abrasive with a vitrified bond, it delivers consistent cut rates and shape retention across high-cycle production runs. The wheel measures 7 inches in diameter, 0.5 inches thick, and accepts a 1.25-inch arbor hole. Rated to a maximum of 3,600 RPM, it carries an I hardness code and medium grade classification, making it well-suited for applications that demand controlled material removal without aggressive wheel breakdown. The 38A series designation identifies the semi-friable white aluminum oxide grain used in this wheel.

This wheel is intended for use on surface grinders, cylindrical grinders, and CNC cutting tool machines in both job-shop and production environments. The vitrified bond resists heat and maintains form under repeated dressing cycles, which is critical when grinding tight-tolerance workpieces from tool steels or super alloys. Soft carbon steels also fall within its rated material applications, making it a versatile choice for shops that run mixed workloads. It is a non-porous, non-tapered, non-recessed Type 1 flat wheel with a white wheel color for easy wear monitoring.

Key Features

• 80 grit, medium grade aluminum oxide abrasive for controlled stock removal
• Vitrified bond maintains wheel form and withstands dressing cycles
• Semi-friable 38A grain self-sharpens under load, extending cut life on hard materials
• Non-porous, non-recessed Type 1 flat profile fits standard surface and cylindrical grinder arbors
• 3,600 RPM maximum speed rating for use on common bench and pedestal surface grinders
• Rated for soft carbon steels, tool steels, and super alloys

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Fits 1.25-inch arbor spindles. Rated material applications include soft carbon steels, tool steels, and super alloys per the 38A Type 1 series specification.

Installation Notes

Grinding wheel mounting and dressing should be performed by a qualified machinist or tool-and-die technician following ANSI B11.9 safety standards. Disconnect and lock out power to the grinder before mounting or removing the wheel. Inspect the wheel for cracks or chips using the ring test before installation, and never exceed the 3,600 RPM maximum speed rating stamped on the wheel. Always use the proper flanges and blotters specified for Type 1 wheels and allow the wheel to run at operating speed for at least one minute behind a guard before presenting work.