Norton 66243428329 Internal Grinding Wheel 60 Grit Type 5

Product Description

The NORTON 66243428329 is a Type 5 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive at 60 grit, this wheel delivers a medium grade cut suited for ferrous metals and general-purpose internal grinding. It measures 2 inches in diameter by 1 inch thick with a 3/8-inch hole, runs at a maximum of 16,235 RPM, and features a vitrified bond construction with K hardness for consistent material removal and predictable wear. Grinding technicians and machinists install this wheel on internal grinding spindles to true bores, finish internal diameters, and maintain tight dimensional tolerances on machined components.

This wheel is appropriate for use in tool rooms, production grinding cells, and maintenance machine shops where internal diameter work on steel, cast iron, and similar ferrous materials is routine. The vitrified bond structure provides rigidity and free-cutting action across a range of surface finishes. At 2 inches in diameter, it is suited for smaller bore diameters typical of precision components such as bushings, sleeves, and bearing housings. The no-recess face profile on both sides allows for consistent contact with the workpiece throughout the wheel life.

Key Features

• 60 grit aluminum oxide abrasive for medium-grade material removal on ferrous metals
• Type 5 wheel geometry with no recess for uniform contact surface
• Vitrified bond with K hardness for structural rigidity and controlled wear
• 16,235 maximum RPM rating for safe high-speed internal spindle operation
• Compact 2-inch diameter fits standard internal grinding arbors
• 3/8-inch hole size for direct mounting on compatible spindle shafts

Compatibility

Designed as an OEM-style replacement or standard supply item for internal grinding spindles that accept a 3/8-inch arbor hole with a Type 5 wheel profile. Verify spindle speed does not exceed the 16,235 RPM rating before mounting.

Installation Notes

Installation should be performed by a qualified machinist or grinding technician following ANSI B11.22 and applicable shop safety standards. Always power down and lock out the grinding machine before mounting or removing the wheel. Inspect the wheel for cracks or chips before use and perform a ring test on vitrified wheels per standard procedure. Never exceed the marked maximum RPM, and dress the wheel with an appropriate dressing tool before the first cut to true the face and expose fresh abrasive.