Technology: Quality low-carbon alloy steel carburized- and quenched- prcessing thread, more durable with harder holder( wear resistance and long service shelf), the thread is more accurate and its hardness is low( capable of pretecting the thread screw of the cutting tool holder), the least hardness of core( impact resistance) and applicable for high- end cutting tool holder.
Feature: Three types of external appearances of black tooth, all black, and white tooth. The consumption of cutting tools is large due to the processing after carburizing and quenching; The process and flow is long; The cost is high; Applicable to high- end clients. Universally adopted abroad and mainly recommended for application.