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.
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…