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+-->//(Power Screws) Example 6.6
+ 
+-->//Number of starts n
+ 
+-->n = 1
+ n  =
+ 
+    1.  
+ 
+-->//Nominal diameter of the screw d (mm)
+ 
+-->d = 52
+ d  =
+ 
+    52.  
+ 
+-->//Pitch of the screw p (mm)
+ 
+-->p = 8
+ p  =
+ 
+    8.  
+ 
+-->//Outer diameter of the friction collar Do (mm)
+ 
+-->Do = 100
+ Do  =
+ 
+    100.  
+ 
+-->//Inner diameter of the friction collar Di (mm)
+ 
+-->Di = 60
+ Di  =
+ 
+    60.  
+ 
+-->//Coefficient of friction for thread mu1
+ 
+-->mu1 = 0.15
+ mu1  =
+ 
+    0.15  
+ 
+-->//Coefficient of friction for collar mu1
+ 
+-->mu2 = 0.12
+ mu2  =
+ 
+    0.12  
+ 
+-->//Axial force to be exerted W (kN)
+ 
+-->W = 2
+ W  =
+ 
+    2.  
+ 
+-->//Lead screw rpm N
+ 
+-->N = 30
+ N  =
+ 
+    30.  
+ 
+-->//For ISO Metric Trapezoidal threads theta (degree)
+ 
+-->theta = 15
+ theta  =
+ 
+    15.  
+ 
+
+Power required to drive the lead screw(kW) = 0.061838 kW
+
+Efficiency of the screw(eta) = 12.937099 percent
+ 
+\ No newline at end of file