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?
| Feature | ZHITIAN | Other Local Brands | European Brands |
|---|
| Torque Class | Up to 18 | 10–13 | 16–18 |
| Precision Grade | Gear Grade 4 (after grinding) | Grade 6–7 | Grade 4 |
| Customization | Yes | Limited | Yes |
| Delivery Time | 3–6 weeks | 6–12 weeks | 12+ weeks |
| Cost Efficiency | High | Medium | Low |
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:
- Screw Diameter & Speed
Match the gearbox model (e.g., ZT95, ZT120) to your extruder screw
size. - Required Torque
Use a torque class (e.g., 12, 15, 18) that matches your material
and process. - 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.
