Norton 66260273601 Cbn Surface Grinding Wheel 120 Grit

Product Description

The NORTON 66260273601 is a Type 1A1 cubic boron nitride (CBN) surface grinding wheel designed for precision material removal on hard ferrous metals and superalloys. Built on a resinoid bond with a medium hardness rating (T), this wheel operates at 120 grit for fine-grade stock removal across roughing and cut-off applications. At 6 inches in diameter and 1/8 inches thick, it fits standard surface grinder spindles and tool and cutter grinding setups. The 1-1/4 inches arbor hole provides a secure, centered mount. Machinists and tool room technicians rely on CBN wheels of this specification when grinding hardened steels, high-speed steel tooling, and similar difficult-to-grind materials where aluminum oxide wheels wear prematurely.

This wheel is suited for surface grinding operations in both production and tool room environments. The resinoid bond provides good shock resistance and cooler cutting action compared to vitrified bonds, making it appropriate for interrupted cuts and precision finishing passes on hardened ferrous workpieces. The 1/4 inches superabrasive depth and 75 concentration rating indicate a medium-loaded wheel that balances wheel life against material removal rate. It fits surface grinders and dedicated CBN grinding machines with a 1-1/4 inches spindle bore. No recess and no taper mean straightforward mounting with standard flanges and blotters.

Key Features

• Type 1A1 straight wheel profile — no recess, no taper, compatible with standard surface grinder flanges
• Cubic boron nitride (CBN) abrasive for extended wheel life on hardened steels and high-speed steel tooling
• Resinoid bond provides shock resistance and cooler cutting action versus vitrified alternatives
• 120 grit fine grade with medium hardness code T for controlled stock removal and finish quality
• Superabrasive concentration of 75 balances wheel life and cut rate for production and tool room use
• 1/4 inches superabrasive depth rated to specification CB120-TB99-1/4

Compatibility

Designed as an OEM-style replacement or direct-fit CBN grinding wheel for surface grinders and tool and cutter grinders accepting a Type 1A1 straight wheel with a 1-1/4 inches arbor hole and 6 inches diameter. No specific machine model compatibility was stated in the product data.

Installation Notes

CBN grinding wheels should be installed by a qualified machinist or grinding machine operator following machine manufacturer guidelines and applicable ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always power down and lock out the grinding machine before mounting or removing the wheel. Inspect the wheel for cracks or chips before mounting, and never exceed the wheel's rated maximum operating speed. Use proper flanges and blotters; do not overtighten the arbor nut, as excessive clamping force can crack superabrasive wheels.