Norton 66243529849 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243529849 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, this wheel delivers consistent stock removal and surface finish on ferrous metals and tool steels. It measures 4 inches in diameter, 1/2 inch thick, with a 3/4 inch hole, and is rated for a maximum of 8,120 RPM. The medium grade and K hardness rating make it well-suited for general-purpose internal grinding where a balance of cut rate and wheel life is required. Grinding wheel technicians and machinists are the primary installers and operators of this product.

This wheel fits internal grinding applications in both production machine shops and toolroom environments. The Type 1 flat wheel form is compatible with standard spindle-mount internal grinding fixtures. It is appropriate for grinding bores, bushings, cylinder bores, and similar internal diameter features. The gray vitrified aluminum oxide construction performs reliably on hardened steels, cast iron, and similar ferrous workpieces in both light and moderate material removal applications.

Key Features

• Aluminum oxide abrasive for reliable performance on ferrous metals and hardened steels
• Vitrified bond provides rigidity, consistent form holding, and good porosity for coolant flow
• Medium grade, K hardness for balanced cut rate and wheel longevity
• 60 grit for moderate stock removal with acceptable surface finish
• Type 1 flat wheel profile suits standard internal grinding spindle arbors
• Rated to 8,120 RPM maximum for internal grinding machine compatibility

Compatibility

Designed as a standard Type 1 internal grinding wheel for use on internal grinding machines accepting a 3/4 inch hole mount and wheels up to 4 inches in diameter.

Installation Notes

Mounting and dressing of grinding wheels should be performed by qualified personnel following ANSI B11.9 and OSHA 29 CFR 1910.215 safety standards. Always inspect the wheel for cracks or chips before mounting, and never exceed the rated maximum RPM of 8,120. Proper flanges, blotters, and a correctly sized arbor must be used; do not force the wheel onto the spindle. Ring-test the wheel prior to use and allow it to run at operating speed in a guarded area before bringing it into contact with the workpiece.