Gears for Plastic and Rubber Machinery
Extruders, internal mixers, calenders and granulators put gearboxes under high, continuous torque. We manufacture extruder gearbox gears, shafts and spare gear sets to drawing.
High, Continuous Torque
Plastic and rubber processing machines work with viscous, heavy material at constant high torque. Extruder gearboxes transmit full power for months at a time; internal mixers and calenders see high loads with every batch. Gear and bearing condition directly decides line uptime.
Nika Gears manufactures case-hardened, ground helical gears, pinion shafts, splined output shafts and complete gear sets for extruder and mixer gearboxes, as OEM parts or spares.
Typical requirements
- Dutycontinuous, high torque
- Accuracyground gears
- Typical gearshelical, pinion shafts
- SplinesDIN 5480 output shafts
- Materials18CrNiMo7-6, 20MnCr5
- Supplyspares and OEM
Where Do Our Gears Run in Plastic and Rubber Plants?
Extruder Gearboxes
Helical reduction gears, pinion shafts and splined output shafts for single- and twin-screw extruder gearboxes.
- Ground helical stages
- Splined screw connections
Internal Mixers and Kneaders
Heavy gear stages and drive shafts for internal mixers, kneaders and mixing mills.
- High-torque stages
- Forged shafts
Calenders and Granulators
Spur and helical gears for calender roll drives, granulators and pelletisers.
- Accurate roll drive gears
- Spare gear sets
Which Materials for Plastic and Rubber Machinery Gears?
| Application | Typical choice |
|---|---|
| Extruder gearbox gears | 18CrNiMo7-6 case hardened and profile ground |
| Output and screw shafts | 34CrNiMo6 or 42CrMo4, splines induction hardened |
| Mixer drive gears | 18CrNiMo7-6 or 34CrNiMo6 |
| Calender roll gears | 20MnCr5 case hardened and ground |
Final material and heat treatment follow your drawing. We advise when the specification is open.
Related industries: chemical · recycling and wastewater · industrial machinery · all industries
Plastic and Rubber Machinery Gear Questions
Can you supply extruder gearbox spare gears?
Yes – helical gears, pinion shafts and splined output shafts, from drawings or measured samples.
Do you grind extruder gears?
Yes. Case-hardened gears are profile ground for quiet, long-life running.
Can you match splines to the extruder screw?
Yes. Splines are made to DIN 5480 or the standard on your drawing and checked with gauges.
Gears for Extruders, Mixers and Calenders
In plastic and rubber processing, the gearbox is the heart of the line. An extruder gearbox converts high motor speed into the high, steady torque the screw needs to melt and convey the material; internal mixers and calenders apply heavy, repeated loads. These gearboxes run continuously, so gear quality shows up directly in uptime and noise.
Extruder gearboxes
Extruder gearboxes use case-hardened, ground helical gears and pinion shafts for high load capacity and low noise. The output shaft connects to the screw through an internal or external spline, and carries the axial thrust of the screw through a large thrust bearing.
Mixers and calenders
Internal mixers and kneaders run heavy gear stages that see a load peak with every batch. Calenders need accurate roll drive gears so the rolls turn evenly. We manufacture these as single replacements or as complete gear sets for overhauls.
Spares and overhauls
When an extruder gearbox is opened for overhaul, worn gears are often replaced as pairs or complete sets. We measure worn parts, prepare drawings for approval and manufacture replacement gearbox components with EN 10204 3.1 documentation.
Send your drawing for extruder and mixer gears manufactured in Türkiye.
Send a gear drawing. Get an answer within 24 hours.
Include the PDF or STEP file, module or DP, number of teeth, material, heat treatment, accuracy grade and quantity. We reply with questions or a quotation.