Norton 66243529532 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243529532 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 tool steels. It measures 4 inches in diameter by 1/4 inches thick with a 1/2 inches arbor hole, and is rated for a maximum speed of 8,120 RPM. The medium grade and K hardness rating make it well-suited for controlled material removal on hardened components. Machinists, tool grinders, and maintenance professionals in industrial and job-shop environments are the primary installers of this wheel.

This grinding wheel is used in internal grinding applications where bore geometry, surface finish, and dimensional accuracy are required. It fits standard internal grinding spindles that accept a 1/2 inches bore mount. Typical applications include grinding bearing seats, cylinder bores, and tooling bores on production or repair equipment. The Type 1 straight-wheel profile makes it compatible with conventional internal grinding machine setups without specialized flanges or adapters.

Key Features

• Aluminum oxide abrasive provides reliable cutting action on ferrous and hardened steel workpieces
• Vitrified bond offers rigidity and consistent wheel form retention during grinding passes
• Medium grade with K hardness rating balances wheel life against material removal rate
• 60 grit delivers a medium surface finish appropriate for semi-finish and finish grinding
• Type 1 straight-wheel profile fits standard internal grinding spindle setups
• Rated to 8,120 RPM maximum operating speed

Compatibility

Designed as an OEM-style replacement or direct-fit wheel for internal grinding machines accepting a Type 1 straight wheel with a 1/2 inches arbor hole and 4 inches diameter.

Installation Notes

Internal grinding wheels must be installed and dressed by a qualified machinist or grinding specialist following ANSI B11.9 and OSHA 1910.215 standards. Always inspect the wheel for cracks or chips before mounting and perform a ring test prior to use. Power down and lock out the grinding machine before mounting or removing the wheel. Never exceed the 8,120 RPM maximum speed rating marked on the wheel.