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  • Backlash vs stiffness in roller screw

    Discussion in 'The main mechanical design forum' started by kuldeep, Sep 16, 2010.

    1. kuldeep

      kuldeep New Member

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      I have to select a roller screw for high accuracy positioning application.

      There are 2 types of Nut configuration available from SKF for zero-backlash
      1. using oversized rollers in the nut (single nut unit).
      2. giving a preload forced with the nut (here the nut will have 2 identical halves).

      can anyone tell which one will be better for zero-backalsh and high stiffness. Has anone worked on similar system.
      thanks
       
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    3. alanho

      alanho Active Member

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      I would go with the preload option.
      IMO, it would be more deterministic. In one of my previous lead screw designs, i had 2 nuts preloaded and binded with springs. If the application is critical, you may also want to consider lockwiring the nuts and applying torque seals to check for slippages.
       

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