Norton 66252939691 Surface Grinding Wheel 46 Grit 7in

Product Description

The NORTON 66252939691 is a Type 1 surface grinding wheel designed for precision material removal on ferrous metals in industrial grinding applications. Built with aluminum oxide abrasive and a vitrified bond, this wheel carries a 46 coarse grit rating and an I hardness code, placing it in the medium hardness range. It measures 7 inches in diameter, 1/4 inch thick, and features a 1-1/4 inch arbor hole. The wheel is rated for a maximum of 3600 RPM and is semi-friable, meaning the abrasive breaks down gradually to expose fresh cutting edges. Licensed machinists, tool and die makers, and grinding machine operators are the primary installers and users of this wheel.

This grinding wheel is suited for surface grinding, cylindrical grinding, and CNC cutting tool machine applications. It is designed for use on soft carbon steels, tool steels, and super alloys. Its coarse grit and medium hardness combination make it effective for stock removal passes where aggressive cutting action is required. The wheel is non-porous, non-tapered, and carries no recess, making it a straightforward flat-face Type 1 configuration compatible with standard surface grinder spindle arbors.

Key Features

• Aluminum oxide abrasive for use on soft carbon steels, tool steels, and super alloys
• Vitrified bond for rigidity and consistent form retention during grinding
• 46 coarse grit rating for efficient stock removal
• I hardness code, medium hardness range, semi-friable abrasive structure
• Type 1 flat wheel, non-porous, no recess, no taper
• Rated to 3600 RPM maximum operating speed

Compatibility

Designed for use with surface grinders, cylindrical grinders, and CNC cutting tool machines. Suitable for grinding soft carbon steels, tool steels, and super alloys. Series designation is 38A Type 1 with specification code 38A46-IVBE.

Installation Notes

Mounting and dressing of grinding wheels should be performed by qualified personnel following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always inspect the wheel for cracks or damage before mounting and perform a ring test. Power down and lock out the grinder before changing wheels, and never exceed the maximum RPM stamped on the wheel or listed on the packaging. A proper wheel guard must be in place before operating.