Norton 66243530126 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243530126 is a Type 1 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive in a vitrified bond, this wheel delivers consistent stock removal and controlled surface finish on ferrous metals and steel alloys. It measures 4 inches in diameter by 1 inch thick, with a 1/2-inch hole, and carries a maximum rated speed of 6,210 RPM. The medium-grade, M-hardness rating makes it well-suited for general-purpose internal grinding where moderate material removal and reasonable wheel life are both required. Licensed machinists and grinding technicians are the primary installers of this product.

This wheel is used in internal grinding applications on cylindrical or surface grinding machines fitted for bore work. Typical applications include finish grinding of bores, bushings, and sleeves in job-shop, toolroom, and production environments. The semi-friable aluminum oxide grain self-sharpens under load, making it effective on hardened steel and similar materials where heat generation must be controlled. The No Recess design simplifies mounting and is compatible with standard internal grinding arbors and flanges.

Key Features

• Type 1 straight-wheel profile for internal grinding applications
• 60 grit aluminum oxide abrasive provides medium material removal and moderate surface finish
• Vitrified bond offers rigidity and consistent performance at rated speeds
• Semi-friable grain self-sharpens during use, reducing loading on hardened workpieces
• M hardness rating balances wheel life against cut rate for general-purpose bore grinding
• No Recess design for straightforward mounting on standard internal grinding arbors

Compatibility

Designed as an OEM-style replacement or standard consumable for internal grinding machines accepting Type 1 wheels with a 1/2-inch arbor hole and a maximum wheel diameter of 4 inches.

Installation Notes

Internal grinding wheels must be installed and dressed by qualified grinding machine operators or machinists. Always power down and lock out the grinding machine before mounting or removing a wheel. Inspect the wheel for cracks or chips before installation and perform a ring test per ANSI B7.1 standards. Never exceed the maximum rated speed of 6,210 RPM stamped on the wheel.