Norton 66252835759 Surface Grinding Wheel 150 Grit 6 in

Product Description

The NORTON 66252835759 is a Type 1 surface grinding wheel engineered for precision stock removal and finish work on metallic workpieces. Built with white aluminum oxide abrasive grain and a vitrified bond, it delivers consistent, cool cutting action suited to soft carbon steels, tool steels, and super alloys. The wheel measures 6 inches in diameter and 1/4 inch thick with a 1-1/4 inch arbor hole, and carries a 150 grit, very fine grade rating with a K hardness code — a medium-hardness designation that balances wheel life against cut rate. Maximum operating speed is 4140 RPM. This wheel is part of the Norton 38A Type 1 series and is installed by machinists and toolroom technicians performing surface and cylindrical grinding operations.

This wheel is suited for use on surface grinders, cylindrical grinders, and CNC cutting tool machines. It is a practical choice for toolroom environments where close tolerances and smooth surface finishes are required on tool steels and super alloys. The semi-friable aluminum oxide grain fractures under load to expose fresh cutting edges, reducing heat buildup and glazing during extended grinding passes. The non-porous, non-tapered, no-recess Type 1 flat wheel profile fits standard arbor configurations without additional adapters in most benchtop and floor-mounted surface grinder setups.

Key Features

• White aluminum oxide abrasive — semi-friable grain promotes self-dressing action and cooler cutting
• Vitrified bond provides rigidity and consistent form-holding under precision grinding conditions
• 150 grit very fine grade produces smooth surface finishes suitable for finish passes on tool steels and super alloys
• K hardness (medium) balances wheel life and cut rate across a range of ferrous workpiece materials
• Type 1 flat wheel profile with no recess and no taper fits standard surface and cylindrical grinder arbors
• Rated to 4140 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Rated material applications include soft carbon steels, tool steels, and super alloys. Part of the Norton 38A Type 1 series, specification 38A150-KV.

Installation Notes

Grinding wheel installation and dressing should be performed by qualified machinists or toolroom personnel. Always power down and lock out the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips using the ring test before mounting, and verify that the machine spindle speed does not exceed the 4140 RPM maximum rating marked on the wheel. Follow ANSI B7.1 safety requirements for the use, care, and protection of abrasive wheels.