Main Base materials

1.38CrMoAlA  (Nitriding Steel)

2. SKD-61   (Special Tool Steel)

3. 42CrMo (Ultrahigh Strength Steel)

4. DC53 (Cold Work Die Steel) 

5. W6Mo5Cr4V2 (High-Speed Tool Steel)

6. HPT

Main Alloy Materials

1. Ni-based alloy/Deloro alloy

2. Tungsten carbide/Wolfram carbide

3. NiCo-based alloy

4. Fe-based alloy

5. Co-based alloy  

Processing Technics

1. Heat treatment

2. Quenching

3. Nitriding treatment

4. Bimetallic alloy welding

5. Bimetallic alloy centrifugal casting

6. Hard-chrome electroplating

Technical parameters

Nitriding layer depth

0.5-0.8mm

Nitrided hardness

HRC56-58

Nitrided brittleness

Less than grade 1

Surface roughness

Ra 0.4

Linearity of screw

0.015mm

Hard-chrome plating hardness

≥HRC57

Chrome-plating layer depth

0.03-0.09mm

Bimetallic layer depth

3 mm

Bimetallic layer hardness

HRC58-62

Above are main technical information, a suitable screw and barrel will be made according to your requirement.

Zhejiang Zhongyang Screw Manufacturing Co.,Ltd is a professional and dedicated designer,manufacturer,rebuilder and distributor of screws,barrels and assembly parts for plastic and rubber machines.With our business philosophy of quality oriented and customers foremost,Zhongyang keeps improving to offer excellent products and services to customers.Our commitment to customer satisfaction is priority number one at ZHONGYAG.

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 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.

• Quality always comes first. Our experienced workers pay attention to every tiny procedure during the production and inspection, to ensure the precision of every dimension.
• Service makes us outstanding. Our sales people are trained on the products every day. They are always ready to answer your questions and offer the best solutions in fluent English at any time.
• Provide an easier working way. With 6 years export experience, we offer before-sales, prouction update, after-sales one stop service, which makes an easier way to work with us. We welcome you to visit our factory at any time!

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If you are looking for a reliable screw barrel supplier,you won't be wrong to choose us!