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