Norton 66243427582 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243427582 is a Type 5 internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive at 60 grit, it delivers a medium-grade cut suited for ferrous metals and general-purpose internal grinding. The wheel measures 3/4 inches in diameter by 3/4 inches thick with a 1/4 inch arbor hole. A single-side recess profile gives clearance for mounting hardware in tight internal grinding setups. The vitrified bond provides rigid grain retention and consistent stock removal. Maximum operating speed is rated at 43,290 RPM. Licensed machinists, tool and die workers, and maintenance grinders are the primary users of this wheel type.

This wheel is suited for internal grinding applications on machining centers, dedicated ID grinders, and toolroom surface grinders with internal grinding attachments. The 60 grit aluminum oxide construction makes it a practical choice for roughing and semi-finishing passes on steel, cast iron, and similar ferrous workpieces. Its compact 3/4 inch diameter fits small-bore work where larger wheel diameters cannot reach. K hardness grade provides enough wheel retention for consistent material removal without excessive loading on softer ferrous materials.

Key Features

• 60 grit aluminum oxide abrasive for medium-grade material removal on ferrous metals
• Type 5 single-side recess profile for clearance in internal grinding arbor setups
• Vitrified bond for rigid grain retention and consistent cut performance
• K hardness grade balances grain retention with free cutting action
• 43,290 maximum RPM rating for high-speed internal grinding spindles
• Compact 3/4 inch diameter fits small-bore and restricted-access grinding applications

Compatibility

Designed as an OEM-style replacement or direct-use abrasive wheel for internal grinding spindles and ID grinding machines that accept a 1/4 inch arbor hole with a Type 5 single-side recess wheel profile.

Installation Notes

Installation should be performed by a qualified machinist or grinding technician following ANSI B7.1 safe use of abrasives standards. Always inspect the wheel for cracks or chips before mounting and perform a ring test on vitrified wheels. Power down and lock out the grinding machine before mounting or removing the wheel. Never exceed the maximum operating speed of 43,290 RPM marked on the wheel or its packaging.