by kanziye@gmail.com
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Custom Built Heavy-Duty Gearboxes for Rubber Internal Mixers
Rubber internal mixers, such as Banbury-type machines, operate under extremely demanding conditions — continuous high torque, axial load, and mechanical shock. The gearbox must endure all of this while maintaining synchronized rotor motion, zero failure tolerance, and long service intervals.
At KNGEAR, we specialize in custom-built gearboxes for internal mixers used in rubber and polymer compounding industries. Our gear units are engineered for heavy-duty operations and tailored to fit your machine design perfectly.
⚙️ Key Technical Requirements for Mixer Gearboxes
- High torque capacity (up to 300,000 Nm or more)
- Synchronized dual output shafts with tight clearance tolerance
- Axial thrust load handling from mixer rotors
- Shock absorption and durability under batch mixing cycles
- Support for jacket cooling and oil circulation systems
- Vertical or horizontal installation flexibility
🛠️ KNGEAR Custom Gearbox Features
| Feature | Description |
|---|---|
| Heavy-duty housing | QT500 ductile iron or welded steel with stress relief |
| Hardened gears | 17CrNiMo6 or 20CrMnTi, carburized & precision ground |
| High-capacity bearings | For radial and axial loading |
| Two-stage gear arrangement | Compact design with torque optimization |
| Custom cooling/lubrication | Oil circulation, thermal protection, and filter integration |
| Input interface compatibility | Flanged motor mount or direct coupling options |
🏭 Typical Applications
- Rubber compounding lines (NR, SBR, EPDM)
- Plastic and elastomer internal mixers
- High-volume tire mixing facilities
- Banbury-style intensive mixers
- Kneader machines for technical rubber products
✅ Why Choose KNGEAR
- 15+ years in heavy industrial gearbox manufacturing
- Custom drop-in replacement for OEM units
- Full in-house gear cutting, case machining, and assembly
- Technical support from design to installation
- Export-ready and performance-tested for international clients
📧 Looking to upgrade your internal mixer gearbox?
Send us your drawing or technical parameters – we’ll design a custom solution that fits your exact requirements.
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