J.B Machinery (Ningbo) Co., Ltd.

As a leading manufacturer specialized in drill bits & customized components, J.B Machinery are dedicated to provide one-stop cost-effective components solution for clients in construction world. Consisting of our own casting, forging & machining factories, J.B has a complete & modernized quality control system on the whole supply chain. Our drill products and construction components are specifically designed for customers` needs and include a wide variety of sizes and designs. "Value added" process is our commitment to fully meet your requirements. We offer engineering assistance from material selection to manufacturing methods. The main materials are 45 steel, 42CrMo4, 52CrMo4 and other high quality steel, and process includes casting, forging & welding, and cold press & machining. The secondary operations includes heat-treatment, Non-DestructiveTest, Plating, Painting, Polishing and Assembly etc. With the help of our excellent Quality Control…