采用扩孔刀，或者双刃镗刀
U钻有62的 一次成型
留余量后，试试用浮动镗刀。
如果精度要求很高，就先镗，后珩。
10年深孔加工经验，随时为您提供专业技术支持。
www.htt-global.com.
Mobile：13020200020.
HTT, founded in 1997, is becoming the leader of deep hole drilling solution in the world.Machine building factories established in both Germany and China, and over 20 manufacturing units for Job-drilling and machine service in Germany, USA, China and India.Effective service can be provided in short time.
By 2014, over 400 various deep hole drilling machines have been delivered to worldwide, including Germany, Italy, USA, Japan, Russia, Holland, Turkey,South Korea, Brazil, Chile, South Africa, China, India, Bangladesh, etc. Over 100 valued customers in various industries,like aerospace, defense, nuclear, oil and gas exploration, construction machinery, automotive, die mould, pellet mill, glass mould，medical apparatus, etc. Many world famous companies, like Bosch, Delphi, Hirschvogel, Ge industry trag, Halliburton, Mahle, Eaton, Nittan, Volkswagen, Ford, Andritz, Muyang, CPM, are HTT’s major customers.
Please visit our website for more information.