High Torque Extruder Gearbox Manufacturers | Full Series Twin Screw Gear Units

Product Specification

Which Extruder Gearbox Manufacturer Offers Reliable High-Torque Solutions?

If you are looking for a trusted extruder gearbox manufacturer with proven performance across industries, ZHITIAN offers a full range of high-precision gearboxes tailored for twin-screw extrusion systems.

As one of the largest twin screw gearbox manufacturers in China, ZHITIAN specializes in designing and producing extruder gearboxes from model 20 to 177, covering almost every application requirement for parallel co-rotating twin-screw extruders. Our gearboxes are widely used by complete extruder equipment manufacturers and have earned an excellent reputation for precision, reliability, and long service life.

What Makes ZHITIAN Gearboxes Stand Out?

High Torque Capability – Up to Class 18

ZHITIAN gearboxes are designed with torque grades up to 18 Nm/cm³, achieving world-class standards in performance and durability. This makes them ideal for demanding extrusion processes in plastics, chemicals, food, and new materials.

Full Range of Models from ZT20 to ZT177

From small lab extruders to large-scale production lines, our full model range supports screw diameters from 20mm to 177mm. Custom gearbox designs for tri-screw or specialty extruders are also available.

High-Precision Machining in Temperature-Controlled Facilities

All gearbox components are manufactured in constant-temperature, humidity-controlled workshops, ensuring consistent precision. Gears are finished with grade 6 precision in design and grade 4 after gear grinding, offering low noise, high efficiency, and long operational life.

How Are ZHITIAN Extruder Gearboxes Manufactured?

ZHITIAN’s gearbox production facility is organized into dedicated process zones for:

• Rough machining area – CNC turning and milling of housing and gear blanks.
• Heat treatment zone – Including carburizing and quenching to enhance gear durability.
• Gear grinding workshop – Achieving precision tooth profiles and ultra-smooth surfaces.
• Quality inspection center – Equipped with CMM, hardness testers, gear testers for full QC.
• Assembly and testing line – Gearboxes are 100% tested for oil leakage, noise, and performance.

What Are the Main Applications of ZHITIAN Gearboxes?

ZHITIAN extruder gearboxes are widely used in:

• Plastic compounding (engineering plastics, masterbatch, biodegradable materials)
• Petrochemical pelletizing
• Powder coating and additives processing
• Food extrusion and feed production
• New energy materials (e.g., battery materials)

What’s the Difference Between ZHITIAN Gearboxes and Other Brands?

ZHITIAN combines European-level design quality with local manufacturing advantages, offering faster delivery and more affordable pricing without sacrificing performance.

How to Choose the Right Extruder Gearbox for Your Application?

When selecting an extruder gearbox, consider:

1. Screw Diameter & Speed
   Match the gearbox model (e.g., ZT95, ZT120) to your extruder screw size.
2. Required Torque
   Use a torque class (e.g., 12, 15, 18) that matches your material and process.
3. Mounting Type & Cooling
   ZHITIAN offers both horizontal and vertical mounting; internal or external oil circulation options are available.

Need help choosing? Our engineers can provide recommendations based on your application.

FAQs About Extruder Gearboxes

What is the maximum torque ZHITIAN gearboxes can handle?

Our gearboxes support up to torque class 18, suitable for the most demanding twin-screw extrusion applications.

Are ZHITIAN gearboxes compatible with Coperion, JSW, and other machines?

Yes, we offer replacement and compatible gearbox units for major brands like Coperion, JSW, Leistritz, and more.

What’s the lead time for standard and custom gearbox models?

Standard models: 3–5 weeks, custom models: 5–8 weeks, depending on complexity.

Does ZHITIAN export gearboxes globally?

Absolutely. We have exported gearboxes to over 40 countries, including Germany, the USA, Turkey, India, and Brazil.

Final Thoughts

ZHITIAN is more than a gearbox manufacturer — we are a technical partner to extruder makers worldwide. With complete in-house manufacturing, advanced gear processing, and global service capability, we help customers optimize extrusion efficiency, reduce downtime, and boost ROI.