Formula for Efficiency – Power Screws – Forward Drive

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

Enter Variables

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

  • View Result

    Forward Drive Efficiency,   `e_f`   =