Formula for Efficiency – Power Screws – Backdrive

`e_b`   = `(1/tanlambda)[(cosphi_ntanlambda-mu)/(cosphi_n+mutanlambda)]`  

Enter Variables

  • Lead angle,   `lambda`   = degrees
  • Thread angle in normal plane,   `phi_n`   = degrees
  • Coefficient of friction,   `mu`   =  

  • View Result

    Backdrive Efficiency,   `e_b`   =