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-->//(Power Screws) Example 6.1
-->//Number of threads n
-->n = 2
n =
2.
-->//Load to be raised W (kN)
-->W = 300
W =
300.
-->//Nominal diameter of the screw d (mm)
-->d = 100
d =
100.
-->//Pitch of the screw p (mm)
-->p = 12
p =
12.
-->//Coefficient of friction at the screw threads mu
-->mu = 0.15
mu =
0.15
-->//For ISO Metric Trapezoidal threads theta (degree)
-->theta = 15
theta =
15.
-->//Neglect collar friction
Torque required to raise the load(Mt) = 3378.159205 N-m
Torque required to lower the load(Ml) = 1030.685630 N-m
Efficiency of screw(eta) = 33.921302 percent
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