Extruders
Extreme torques. Tight installation spaces. Continuous operation.
We know all about it.

Extrusion lines are among the most demanding machines in terms of drive technology. The drive must transmit high torques continuously and smoothly – often within very tight installation spaces, at high temperatures and with operation that rarely stops. No standard gearbox can withstand these demands in the long term.
CHEMNITZER ZAHNRADFABRIK develops and manufactures specialized gearboxes specifically for extruder applications – for single-screw and twin-screw extruders, for plastics, rubber, foodstuffs and pharmaceuticals. Each gearbox is designed for the specific process: screw speed, torque profile, installation space and environmental conditions determine the design.

Typical requirements for the gearbox

• High and consistently stable torque transmission – often several thousand Nm
• Compact design combined with high power density
• Precise speed control for uniform material processing
• Resilience to temperature, vibration and aggressive environments
• Long service life with minimal maintenance requirements in continuous operation
• Precise positional alignment of the output shafts in multi-shaft designs

What we offer

We design extruder gearboxes from scratch to suit your process – including gear optimization for maximum efficiency, bearing design for continuous operation and the integration of couplings or sensors on request. Thanks to our high level of in-house production at our Chemnitz site, short response times and close communication throughout the entire project are a matter of course.

Typical gearbox types and application examples

• Spur gearboxes and multi-stage combinations for single-screw extruders
• Power-split gearboxes for twin-screw extruders
• Laboratory extruder gearboxes with high power density and integrated overload clutch
• Hydraulic motor gearboxes with generously dimensioned bearings for responsive drives