Norton 66243529032 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243529032 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 on ferrous metals and hardened steel in machine shop and production environments. The wheel measures 3 inches in diameter by 1/2 inch thick with a 3/8-inch arbor hole, and carries a maximum operating speed of 10,825 RPM. At 60 grit with a medium grade and J hardness rating, it balances cut rate with surface finish quality. Weighing 0.3 pounds, it is suited for internal grinding spindles and tool post grinder setups.

This wheel is used in internal grinding applications on cylindrical grinders, jig grinders, and tool post grinders. It is appropriate for grinding bores, bushings, races, and similar internal features in a machine shop or industrial maintenance environment. The semi-friable aluminum oxide abrasive self-sharpens under load, making it effective on hardened ferrous workpieces where consistent finish is required. Licensed machinists and toolroom technicians are the primary installers and operators of this wheel type.

Key Features

• 60 grit, medium grade aluminum oxide abrasive for balanced material removal and surface finish
• Vitrified bond for rigidity and consistent wheel form retention during internal grinding
• Semi-friable abrasive construction promotes self-sharpening under grinding load
• 10,825 maximum RPM rating for safe operation on internal grinding spindles
• No-recess Type 1 straight wheel profile for straightforward mounting
• White wheel color for easy visual identification as an aluminum oxide medium-grade wheel

Compatibility

Designed as an OEM-style replacement or direct-use internal grinding wheel for spindles and arbors accepting a 3/8-inch hole with a 3-inch diameter Type 1 wheel form.

Installation Notes

Installation and operation of grinding wheels must comply with ANSI B11.9 and applicable OSHA standards for abrasive wheel machinery. Always power down and lock out the grinder before mounting or removing a wheel. Inspect the wheel for cracks or chips before mounting and perform a ring test prior to use. Never exceed the maximum RPM rating marked on the wheel, and always use the correct flanges and blotters for the arbor size.