Norton 66253246879 Surface Grinding Wheel 14in Type 5

Product Description

The NORTON 66253246879 is a Type 5 vitrified aluminum oxide surface grinding wheel engineered for aggressive stock removal on ferrous and non-ferrous metals. Measuring 14 inches in diameter and 2 inches thick with a 5-inch arbor hole, it carries a 46-grit coarse grade and an H hardness code, placing it on the softer end of the hardness scale for efficient self-dressing action on hard workpieces. The vitrified bond provides rigidity and porosity control suited to high-material-removal operations. At a maximum rated speed of 1,775 RPM, this wheel is sized for industrial surface and cylindrical grinding equipment. It weighs 11.43 pounds. Licensed tradespeople and grinding machine operators in metalworking shops are the primary installers.

This wheel is well suited to surface grinding and cylindrical grinding applications across a broad range of materials including 400 Series stainless, hard and soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron. The coarse 46-grit structure supports rapid material removal in production or toolroom environments where surface finish is secondary to removal rate. The one-side recess design — 8 inches in recess diameter and 1 inch deep — reduces wheel weight and improves clearance in recessed-hub applications.

Key Features

• Aluminum oxide abrasive grain for reliable performance on steels and cast irons
• 46-grit coarse grade for high stock removal rates
• H hardness code — softer wheel that releases grain efficiently on hard materials
• Vitrified bond for rigidity and consistent cut throughout wheel life
• Type 5 configuration with one-side recess: 8-inch recess diameter, 1-inch recess depth
• Rated to 1,775 RPM maximum operating speed

Compatibility

Designed for use with surface grinders and cylindrical grinders accepting a 14-inch diameter, 5-inch arbor hole Type 5 wheel. Compatible material applications include 400 Series stainless, hard carbon steels, soft carbon steels, tool steels, aluminum, cast iron, ductile iron, and gray iron per Norton specification 46H8V32A and 60H8V32A.

Installation Notes

Grinding wheel mounting must 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 chips before mounting and perform a ring test. Never exceed the 1,775 RPM maximum speed rating — confirm spindle speed before starting. Use flanges of the correct size and type, ensure the arbor hole fits without forcing, and run the wheel under guard at operating speed for at least one minute before bringing it into contact with the workpiece.