Norton 66252939700 Surface Grinding Wheel 7in 60 Grit

Product Description

The NORTON 66252939700 is a Type 1 surface grinding wheel engineered for precision stock removal on soft carbon steels, tool steels, and super alloys. It measures 7 inches in diameter, 1/4 inch thick, with a 1-1/4 inch arbor hole. The wheel is constructed from white aluminum oxide abrasive bonded with a vitrified bond system, rated at 60 grit and K hardness for medium-grade cutting action. A maximum operating speed of 3,600 RPM keeps the wheel within safe limits for standard surface grinder spindles. Semi-friable grain structure promotes consistent cut and controlled wear throughout the wheel life.

This wheel is suited for surface grinding operations on soft carbon steels, tool steels, and super alloys in industrial and shop environments. Compatible equipment includes surface grinders, cylindrical grinders, and CNC cutting tool machines. The Type 1 straight-wheel profile fits standard wheel-flanged spindle assemblies without recess or taper. It is a fit for production shops and tool rooms requiring repeatable surface finishes and dimensional accuracy on ferrous and specialty alloy workpieces.

Key Features

• Type 1 straight profile with no recess and no taper for direct spindle mounting
• White aluminum oxide abrasive, semi-friable, for cool cutting on steels and super alloys
• Vitrified bond provides rigid structure and consistent grit exposure
• 60 grit, K hardness (medium grade) balances material removal rate with surface finish quality
• 3,600 RPM maximum speed rating for safe use on standard surface grinder spindles
• Non-porous construction for predictable performance across the full wheel life

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated for soft carbon steels, tool steels, and super alloys per manufacturer specification. Series designation 38A Type 1.

Installation Notes

Grinding wheel installation must be performed by a qualified operator following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Before mounting, power down the grinder completely and inspect the wheel for cracks or chips using the ring test. Use proper flanges and a blotter on each side of the wheel; never exceed the 3,600 RPM maximum speed marked on the wheel. After mounting, run the wheel under guard for at least one minute before bringing it into contact with the workpiece.