Related Glossary Terms
- cubic boron nitride ( CBN)
cubic boron nitride ( CBN)
Crystal manufactured from boron nitride under high pressure and temperature. Used to cut hard-to-machine ferrous and nickel-base materials up to 70 HRC. Second hardest material after diamond. See superabrasive tools.
- hard turning
Single-point cutting of a workpiece that has a hardness value higher than 45 HRC.
Workpiece is held in a chuck, mounted on a face plate or secured between centers and rotated while a cutting tool, normally a single-point tool, is fed into it along its periphery or across its end or face. Takes the form of straight turning (cutting along the periphery of the workpiece); taper turning (creating a taper); step turning (turning different-size diameters on the same work); chamfering (beveling an edge or shoulder); facing (cutting on an end); turning threads (usually external but can be internal); roughing (high-volume metal removal); and finishing (final light cuts). Performed on lathes, turning centers, chucking machines, automatic screw machines and similar machines.
Tungaloy America Inc. demonstrates the hard turning capabilities of its T-CBN, AH8000 and LX11 insert grades in a two-minute video that runs through a series of turning operations. The video also provides recommendations for which insert grades to use for continuous, light interrupted and heavy interrupted turning applications.
A complimentary brochure highlights CBN, carbide and ceramic inserts for Hard Turning in an easy-to-understand format and provides technical and application solutions. Click here to download Tungaloy's Hard Turning brochure.