Area of application Tandem axial bearings of series T.AR were developed specifically for extruder gearboxes. The bearings are mainly used in the gearboxes of twin screw extruders, but also of single screw extruders. Typical areas of application are: 

■ smaller extruders for pelletising in the feed and food industry 

■ extruders in the plastics industry, for example in injection moulding and profile extrusion 

■ large extruders for the production of plastic granulate in the petrochemical industry. Requirements 

Tandem axial bearings of series T.AR are highly suitable for use in extruders as they meet the following requirements: 

■ accommodation of high back pressures exerted on the output shafts by the extruder screws 

■ smaller radial design envelope required. Due to the process, this is limited by the narrow centre distance in twin screw extruders 

■ maximum load carrying capacity due to full utilisation of the axial design envelope 

■ long operating life 

■ low frictional torque 

■ low speeds of counter-rotating extruders.