Vde Injection T Handle,Vde/Gs Certificate T Handle,En60900 Approved T Handle,1000V Insulation T Handle Shanghai Countool In't Trading Co.,ltd , https://www.countool.com The processing of slender spiral shafts has always been a major problem in the machining industry. Recently, I have gained some experience in processing the outer circumference of the spiral shaft of the screw feeder of our factory on the C630 horizontal lathe. The spiral shaft has a length of 2780mm and is welded on a seamless steel pipe of φ51mm and thickness 4.5mm with a thickness of 3mm. The material is a continuous snail of Q235.