Norton 66243530393 Type 11 Grinding Wheel 80 Grit

Product Description

The NORTON 66243530393 is a Type 11 vitrified aluminum oxide grinding wheel designed for precision tool grinding and sharpening applications. It measures 4 inches in diameter with a 1.5-inch overall thickness and a 0.25-inch face width. The wheel carries an 80-grit medium grade with a J hardness code, making it well suited for moderate stock removal on ferrous and non-ferrous tooling. The vitrified bond provides rigidity and open structure for consistent cutting action, and the friable abrasive grain breaks down during use to expose fresh cutting edges. Rated to a maximum of 5,730 RPM, this wheel fits standard bench grinders used in tool rooms, maintenance shops, and trade service environments.

This wheel is commonly used in tool-and-cutter grinding, drill bit resharpening, and general precision grinding tasks. Its 1.25-inch arbor hole and 3-inch hub diameter suit a range of bench and pedestal grinder spindles found in HVAC, plumbing, electrical, and general mechanical service shops. The white aluminum oxide composition is appropriate for grinding high-speed steel and similar hardened tool materials without excessive heat buildup at the cutting edge.

Key Features

• Type 11 cup wheel profile for tool and cutter grinding applications
• 80-grit aluminum oxide abrasive with J hardness and medium grade for controlled stock removal
• Vitrified bond with friable grain for consistent, self-dressing cutting action
• 5,730 maximum RPM rating for safe operation on standard bench and pedestal grinders
• 1.25-inch arbor hole and 3-inch hub diameter for broad spindle compatibility
• White wheel color indicates pure aluminum oxide composition suitable for hardened tool steels

Compatibility

Designed as a replacement or service grinding wheel for bench and pedestal grinders with a 1.25-inch arbor bore, commonly used in tool room and trade maintenance applications.

Installation Notes

Grinding wheel mounting and dressing must be performed by qualified personnel following ANSI B7.1 safety standards. Always power down and lock out the grinder before changing wheels. Inspect the wheel for cracks or chips before installation and perform a ring test. Never exceed the maximum RPM stamped on the wheel, and ensure the grinder guard is in place before operation.