Based on the product positioning of "based on professionalism and practicality first", Metal Processing Magazine has focused on planning three series of books: taboo series, practical series, and selection series. The book "Taboos in the Application of CNC Tools" is a typical representative of the "Taboo Series" books and has been published in March 2023. The book lasted 4 years and used a crowdfunding model to compile a total of 276 taboo cases around common problems in the applications of turning tools, drilling tools, milling tools, boring tools, threading tools, cutting and grooving tools, and grinding tools. .

(This case is selected from Chapter 1 Taboos of Application of Turning Tools in "Taboos of Application of CNC Tools", written by Zhou Wei of Shanghai Automotive Transmission Co., Ltd.)

CBN (cubic boron nitride) is composed of boron nitride containing ceramic or titanium nitride as a binder. It can withstand high cutting temperatures and is suitable for high-speed cutting. CBN is commonly used for finishing turning of hardened steel and roughing gray cast iron at fast cutting speeds.


1) Choose a tool with the correct CBN content. The specific application taboos for the tool are as follows.

2) To avoid chips hitting the machined surface, the taboos for CBN hard turning are as follows.