-->//(Power Screws) Example 6.1
 
-->//Number of starts n
 
-->n = 3
 n  =
 
    3.  
 
-->//Nominal diameter of screw d (mm)
 
-->d = 50
 d  =
 
    50.  
 
-->//Pitch of the screw p (mm)
 
-->p = 8
 p  =
 
    8.  
 
-->//Collar outer diameter Do (mm)
 
-->Do = 100
 Do  =
 
    100.  
 
-->//Collar inner diameter Di (mm)
 
-->Di = 65
 Di  =
 
    65.  
 
-->//Coefficient of friction mu
 
-->mu = 0.15
 mu  =
 
    0.15  
 
-->//Load to be raised W (kN)
 
-->W = 15
 W  =
 
    15.  
 
-->//Force applied at radius rad (mm)
 
-->rad = 500
 rad  =
 
    500.  
 

Torque required to raise the load(Mtt) = 204644.140833 mm

Torque required to lower the load(Mlt) = 87401.514671 mm

Force at 500mm radius required to raise the load(Pi) = 409.288282 N