Norton 66253013787 Surface Grinding Wheel 80 Grit Type 1

Product Description

The NORTON 66253013787 is a Type 1 straight surface grinding wheel designed for precision stock removal on ferrous metals and hard alloys. Built on a vitrified bond with 80-grit aluminum oxide abrasive, this wheel delivers consistent cut rates and predictable wear across high-cycle grinding operations. It measures 8 inches in diameter, 0.5 inches thick, with a 1-1/4 inch arbor hole, and carries a J hardness code (medium grade). The 38A series designation indicates a semi-friable aluminum oxide grain suited to applications requiring a sharp, self-dressing cutting action. Maximum operating speed is 3,600 RPM.

This wheel is rated for use on soft carbon steels, tool steels, and super alloys. It is a standard fit for surface grinders, cylindrical grinders, and CNC cutting tool machines in production and tool-room environments. The medium-grade, non-porous, vitrified matrix holds its form well under moderate grinding pressures, making it a practical choice for flat surface finishing and tool reconditioning work in both job-shop and industrial settings.

Key Features

• 80-grit aluminum oxide abrasive for moderate material removal with good surface finish
• J hardness code, medium grade, vitrified bond for consistent wheel wear and form retention
• Type 1 straight wheel profile, no recess, non-tapered for standard surface and cylindrical grinder spindles
• Semi-friable grain structure promotes self-dressing action on tool steels and super alloys
• Rated to 3,600 RPM maximum operating speed
• White wheel color for visual wear monitoring during use

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. Fits spindles accepting a 1-1/4 inch arbor hole.

Installation Notes

Installation should be performed by a qualified grinding machine operator following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always inspect the wheel for cracks or chips before mounting and perform a ring test. Power down and de-energize the machine completely before mounting or dismounting the wheel. Never exceed the rated maximum speed of 3,600 RPM; verify machine spindle speed before operation.