Norton 66252938879 Surface Grinding Wheel 46 Grit 7 in

Product Description

The NORTON 66252938879 is a Type 1 vitrified surface grinding wheel engineered for precision stock removal on ferrous metals. Measuring 7 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole, this wheel features 46-grit aluminum oxide abrasive bonded in a vitrified matrix at K hardness (medium). The 32AA46-KVTR specification designates a porous, open structure that promotes cool cutting and chip clearance. Rated to 3600 RPM, it delivers consistent coarse-grade material removal on hard carbon steels, soft carbon steels, and tool steels. Machinists and tool grinders install this wheel in production and maintenance environments where flat surface accuracy is critical.

This wheel is suited for surface grinding applications on ferrous workpieces in both production shops and tool rooms. Compatible with surface grinders, cylindrical grinders, and CNC cutting tool machines, it handles a wide range of carbon and tool steel grades. The coarse 46-grit and porous 32A structure make it particularly effective for rapid stock removal passes where surface finish is a secondary priority to material removal rate.

Key Features

• 46-grit aluminum oxide abrasive for aggressive coarse-grade stock removal
• Vitrified bond (32AA46-KVTR) provides a rigid, porous structure that resists heat buildup
• K hardness (medium) balances wheel wear rate against workpiece aggression on steel
• Rated at 3600 RPM maximum operating speed
• Porous, no-recess Type 1 flat wheel geometry for standard surface and cylindrical grinder spindles
• Suitable for hard carbon steels, soft carbon steels, and tool steels

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines requiring a Type 1 flat wheel with a 1-1/4 inch arbor bore. Suitable for material applications including hard carbon steels, soft carbon steels, and tool steels.

Installation Notes

Wheel mounting and dressing should be performed by a qualified machinist or grinding specialist following ANSI B11.9 grinding safety standards. Before mounting, inspect the wheel for cracks using a ring test and confirm the machine spindle speed does not exceed the 3600 RPM maximum rating. Always install proper wheel flanges and a blotter between the flange and wheel face. Dress the wheel with an appropriate diamond dresser before initial use to true the face and expose fresh abrasive.