turret lathe उदाहरण वाक्य

By April 1, 1917, the machinery and tools were purchased by " H . A . Smith Manufacturing Company " who put them on the market as a " good assortment " of lathes, drills, milling machines, grinders, turret lathes, chucks, vises and small tools and leather belting for " immediate delivery ."
From that time on, machines with fully automated cycles were usually called " automatic screw machines ", and eventually, in the usage of most people in the machining industries, the term " screw machine " no longer was used to refer to manual or semi-automatic turret lathes, having become reserved for one class of machine, the fully mechanically automated type.
This narrow meaning of " screw machine " remained stable from about the 1890s until the 1950s . ( Brown & Sharpe continued to call some of their hand-operated turret lathe models " screw machines ", but most machinists reserved the term for automatics . ) Within this class called " screw machines " there were variations, such as single-spindle versus multispindle, horizontal-turret versus vertical-turret, etc.