Norton 66243528828 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243528828 is a Type 1 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive and a vitrified bond, it delivers consistent stock removal on ferrous metals and hard alloys. The wheel measures 3 inches in diameter by 1/2 inch hole by 1/2 inch thick and is rated to a maximum of 10,825 RPM. Medium grade with K hardness provides a balanced cut that holds form well under moderate to heavy grinding pressure. Grinding professionals and tool-and-die shops rely on this wheel for tight-tolerance internal work.

This wheel is suited for internal cylindrical grinding applications in industrial and job shop environments. It is commonly used in jig grinders, internal grinding machines, and ID grinding fixtures to finish bores, bushings, and cylinder bores to specified tolerances. The vitrified bond allows for coolant use and maintains wheel integrity at operating speeds. Its compact 3-inch diameter makes it well-matched for small-bore finishing passes where wheel clearance is limited.

Key Features

• Aluminum oxide abrasive for reliable performance on hardened steels and cast iron
• Vitrified bond supports coolant use and resists heat distortion during grinding
• Medium grade, K hardness rating provides consistent cut rate with good wheel life
• 60 grit delivers a medium surface finish suitable for semi-finish and finish grinding passes
• Rated to 10,825 RPM for use on standard internal grinding spindles
• Type 1 straight wheel geometry for straightforward mounting and dressing

Compatibility

Designed as an OEM-style replacement or direct fitment grinding wheel for internal grinding machines accepting a Type 1 straight wheel with a 1/2-inch arbor hole and 3-inch diameter.

Installation Notes

Installation should be performed by a qualified grinding machine operator or machinist. Always power down and lock out the grinding machine before mounting or removing the wheel. Inspect the wheel for cracks or chips before mounting and perform a ring test per ANSI B7.1 standards. Never exceed the maximum rated RPM of 10,825; verify spindle speed before operation.