Norton 66253043858 Surface Grinding Wheel 8in 60 Grit

Product Description

The NORTON 66253043858 is a Type 1 straight surface grinding wheel built for precision stock removal on metalworking applications. It measures 8 inches in diameter, 1/2 inch thick, with a 1-1/4 inch arbor hole. The wheel is made from white aluminum oxide abrasive bonded in a vitrified bond matrix, producing a medium-grade, semi-friable wheel rated at 3600 RPM maximum. Aluminum oxide is the correct abrasive choice for soft carbon steels, tool steels, and super alloys, delivering consistent cut rates without excessive heat buildup at the workpiece surface.

This wheel is suited for surface grinding, cylindrical grinding, and CNC cutting tool machine applications in both job shop and production environments. The vitrified bond provides rigidity and porosity control that supports precise material removal and consistent wheel breakdown, making it a reliable choice for machinists and tool and die professionals working across a range of ferrous metals. The 38A Type 1 series designation identifies this as a standard straight wheel geometry with no recess and no taper.

Key Features

• White aluminum oxide abrasive — semi-friable grain for self-sharpening action on ferrous metals
• Vitrified bond construction for rigidity and dimensional stability during grinding
• 60 grit, J hardness (medium grade) — balanced material removal rate and wheel life
• 3600 RPM maximum operating speed
• Non-porous, no-recess, non-tapered Type 1 straight wheel geometry
• 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 machines with a 1-1/4 inch arbor and guards rated for 8 inch diameter Type 1 wheels at 3600 RPM or higher.

Installation Notes

Wheel mounting and dressing should be performed by a qualified machinist or grinding specialist following ANSI B7.1 safety standards. Always power down and lock out the machine before mounting or removing the wheel. Inspect the wheel for cracks or chips using a ring test before installation, and never exceed the 3600 RPM maximum rated speed. Use appropriate flanges and a blotter on each side of the wheel as required by the grinder manufacturer.