Norton 66243427937 Type 5 Internal Grinding Wheel 60 Grit

Product Description

The NORTON 66243427937 is a Type 5 recessed internal grinding wheel designed for precision bore and internal diameter grinding operations. Built with aluminum oxide abrasive at 60 grit, it delivers medium-grade cutting action suited to ferrous metals and general-purpose tool room work. The vitrified bond provides rigidity and consistent stock removal, while the K hardness rating keeps the wheel performing predictably under load. Rated to a maximum of 21,645 RPM, this wheel is engineered for high-speed spindle applications on internal grinding machines. It weighs approximately 1.8 pounds.

This wheel is used in surface and internal grinding applications where a recessed wheel profile is required. The Type 5 configuration features a single-side recess, making it compatible with recessed-flange mounting systems common on dedicated internal grinding machines and toolroom grinders. Typical installers include machining and grinding technicians performing bore finishing, bushing seat preparation, and similar precision grinding tasks in production or maintenance shop environments.

Key Features

• 60 grit aluminum oxide abrasive for medium-grade material removal on ferrous workpieces
• Type 5 single-side recessed profile for recessed-flange spindle mounting
• Vitrified bond construction provides rigidity and consistent cutting geometry
• K hardness rating delivers stable performance across a range of feed rates
• 21,645 maximum RPM rating supports high-speed internal grinding spindles
• Gray wheel color for quick visual identification of abrasive type in the shop

Compatibility

Designed as an OEM-style replacement or direct-use internal grinding wheel for internal grinding machines equipped with recessed-flange spindle systems that accept Type 5 wheels measuring 1.5 inches in diameter with a 0.375-inch hole and 0.5-inch single-side recess.

Installation Notes

Installation should be performed by qualified grinding machine operators or machining technicians. Always power down and lock out the grinding machine before mounting or removing any wheel. Inspect the wheel for cracks or chips before mounting, and conduct a ring test per ANSI B7.1 safety standards. Never exceed the rated maximum RPM of 21,645 under any operating condition.