-->//(Power Screws) Example 6.7
 
-->//Speed of the tool holder v (m/min)
 
-->v = 5
 v  =
 
    5.  
 
-->//Number of starts of the screw n
 
-->n = 1
 n  =
 
    1.  
 
-->//Nominal diameter of the screw d (mm)
 
-->d = 48
 d  =
 
    48.  
 
-->//Pitch of the screw p (mm)
 
-->p = 8
 p  =
 
    8.  
 
-->//Force exerted by operating nut W (N)
 
-->W = 500
 W  =
 
    500.  
 
-->//Mean radius of the friction collar rm (mm)
 
-->rm = 40
 rm  =
 
    40.  
 
-->//Coefficient of friction at thread and collar surfaces mu
 
-->mu = 0.15
 mu  =
 
    0.15  
 

The power required to drive the screw(kW) = 0.347319 kW

Efficiency of the mechanism(eta) = 11.996655 percent