Materials for Screw Elements

The modular principle is also frequently used in the design of the extruder screw. The screw comprises individual screw elements, which are threaded onto a shaft. The elements are positively fitted to the shaft to transmit the required torque. They are also attached together and axially clamped. The elements of a screw module are typically made of nitrided steel. Special designs are required for wear protection and corrosion protection depending on the respective requirements  

Through-hardened Kneading element Kneading element made 

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