Diameter of pin screw and barrel: Φ 75mm-Φ 200mm
Diameter of cold feed or hot feed screw and barrel: Φ 30mm-Φ 300 mm
L/D ratio: 12-18

Base Materials:
1)38CrMoAlA(JIS SACM645)
2)42CrMo(AISI 4140)
3)4Cr5MoSi V1 (JIS SKD-61)
4)9Cr18MOV
5)HPT

Bimetallic alloy materials:
(1)Fe-based alloy
(2)Ni-based alloy/Deloro alloy
(3)Co-based alloy
(4)NiCo-based alloy
(5)Tungsten carbide/Wolfram carbide

Technics:
Heat treatment
High-frequency quenching
Nitriding treatment
Hard-chrome electroplating
Bimetallic alloy welding
Bimetallic alloy centrifugal casting

Our advantages:

Working Attitude---- Every employee at ZHONGYANG is a good team player. We have enthusiasm on our jobs and we do our jobs seriously and responsibly, every employee wants to do the best to contribute to our company's growth at ZHONGYANG.

Factory Strength---- We are located in Jintang town, Zhoushan city of Zhejiang provice. Our factory occupies 10, 000M2 and is well equipped with kinds of advanced CNC processing machines. With 12 years' industrial know-how and experience, we have grown to be a specialist in the industry. We have our own professional teams in the sales, design, production, inspection and customer service areas. And we are always ready to help you with your specific needs.

Quick Response---- Our sales team is well-trained with good qualifications and is passionate and ambitious, we respond quickly and efficiently.
Technical Capabilities ----- We have a group of experienced and creative engineers, they help to solve customers' technical problems with their expertise and they do excellent jobs in designing new screw and barrel to achieve superior performance of the screw and barrel.

Good Products ----- As an ISO certified enterprise since 2006, we established complete quality control system and step by step, we implement the system thoroughly from the first production process to final products now. Every production process in under strict inspection to ensure that only qualified products are sent to our customers.

After Service-----We archive every customer from the beginning of our cooperation and we will follow up till customers receive our products and trial them with no problem. If by any chance you meet any problem on our products, our after service team will work out solution efficiently. And we could send engineer to your place under necessary circumstance no matter you are in China or abroad.

Focus on quality and service.
Experienced manufacturer, we will be the best choice.