Norton 66253220909 Surface Grinding Wheel 60 Grit Type 5

Product Description

The NORTON 66253220909 is a Type 5 recessed surface grinding wheel designed for precision stock removal on ferrous metals using surface and cylindrical grinders. Built with aluminum oxide abrasive and a vitrified bond, this wheel carries a 60 grit, medium grade specification coded 48A60-GVP2. The wheel measures 12 inches in diameter and 1-1/2 inches thick with a 5-inch arbor hole. Its ruby-colored aluminum oxide grain and porous structure support consistent coolant flow during wet grinding operations, making it well suited to production and toolroom environments. Rated to 2710 RPM, the wheel operates at a soft-to-medium hardness (G hardness code) that releases dull grain efficiently and resists loading on harder workpiece materials.

This wheel is intended for wet grinding applications on hard carbon steels, soft carbon steels, and tool steels. The Type 5 configuration includes a single-side recess measuring 1/2 inch deep and 7-1/2 inches in diameter, which reduces wheel weight and improves clearance in recessed-hub mounting configurations. It is compatible with both surface grinders and cylindrical grinders in industrial and toolroom settings. Typical users include machinists, toolmakers, and grinding machine operators working on flat stock, tooling, and precision ground components.

Key Features

• Aluminum oxide abrasive with vitrified bond for consistent cut and long wheel life
• 60 grit, medium grade (G hardness) for efficient material removal on steel workpieces
• Porous structure promotes coolant penetration in wet grinding operations
• Type 5 single-side recessed design reduces rotating mass and aids hub clearance
• Rated to 2710 RPM for safe operation on compatible surface and cylindrical grinders
• Specification code 48A60-GVP2 for precise cross-referencing and replacement ordering

Compatibility

Rated for use with surface grinders and cylindrical grinders. Suitable for grinding hard carbon steels, soft carbon steels, and tool steels. Verify that the machine spindle speed does not exceed the 2710 RPM maximum and that the arbor accepts a 5-inch hole with the appropriate flanges for a 12-inch diameter, Type 5 wheel.

Installation Notes

Installation should be performed by a qualified machinist or grinding machine operator following ANSI B7.1 safety standards for abrasive wheels. Power down and lock out the grinder before mounting or dismounting the wheel. Inspect the wheel for cracks or chips before mounting and perform a ring test per standard procedure. Always run the wheel through a guarded break-in period at operating speed before bringing it into contact with the workpiece.