Norton 66243428332 Internal Grinding Wheel 60 Grit Type 5

Product Description

The NORTON 66243428332 is a Type 5 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive at 60 grit, it delivers medium-grade stock removal on ferrous metals and tool steels. The wheel measures 2 inches in diameter by 1-1/2 inches thick with a 5/8-inch arbor hole, and carries a maximum operating speed of 16,235 RPM. A vitrified bond holds the abrasive matrix together, providing consistent cut rate and dimensional stability under heat. The one-side recess design reduces weight and allows clearance in confined grinding applications. This wheel is used by tool grinders, machinists, and maintenance technicians performing internal grinding work.

This wheel is suited for internal grinding of cylindrical bores, sleeves, and housings where tight tolerances are required. The 60-grit aluminum oxide construction handles general-purpose material removal on hardened and unhardened steel. Its compact 2-inch diameter makes it appropriate for small-bore applications found in production machining and tool room environments. The K hardness grade and vitrified bond provide a stable, self-dressing action that helps maintain wheel form through the grinding cycle.

Key Features

• 60 grit medium-grade aluminum oxide abrasive for general-purpose internal grinding
• Type 5 one-side recess profile provides clearance in tight bore applications
• Vitrified bond delivers consistent cut rate and thermal stability
• K hardness grade suits a wide range of ferrous workpiece materials
• 16,235 maximum RPM rating for safe use on standard internal grinding spindles
• 5/8-inch arbor hole fits common internal grinding wheel adapters

Compatibility

Designed as an OEM-style replacement and standard consumable for internal grinding machines accepting Type 5 wheels with a 2-inch diameter and 5/8-inch arbor hole.

Installation Notes

Installation should be performed by a qualified machinist or tool grinder familiar with grinding wheel mounting procedures. Before mounting, inspect the wheel for cracks or chips using a ring test per ANSI B11.9 guidelines, and never use a damaged wheel. Ensure the machine spindle speed does not exceed the 16,235 RPM rating marked on the wheel. Use the correct flanges and blotters for the arbor size, and run the wheel at operating speed in a guarded position for at least one minute before bringing it into contact with the workpiece.