Binzhou Zhengdao Mechanical Manufacturing Co., Ltd. (BZD for short) was found in 2006. The founder and board chairman Mr. Su Daosheng of BZD Company is the originator (pioneer) of piston ring carrier insert in China who developed this kind of product in 1984. He possesses a series of patents for Piston Ring Carrier in China, among them some patents are national invention patents like Ring Carrier Insert with Cooling Gallery, Medium Nickel Ring Carrier Inserts etc. He is a senior expert of metal casting and he has a very rich experience in technology for manufacturing Piston Ring Carrier Inserts.

BZD Company's main products are Ring Carrier Inserts, Salt Cores, Ring Carrier Insert with Cooling Gallery, Medium Nickel Ring Carrier Inserts, ultra-low Ring Carrier Inserts etc.

All of the emplyees of BZD Company try their best to make products with high quality and the lowest price for our all customers like KS Group, Federal Mogul etc. We will try our best to reduce the manufacturing cost to offer our all customers the optimal price to reduce our customer's cost pressures.

We have passed the authentication of ISO/TS 16949: 2009quality management system, ISO 14001: 2004 environment management, China national safety production management system and China national measurement standard management system.