Chapter 17 : Thread Manufacturing

Exa 17.1 : Page 670

In [1]:
d = 80 # outside diameter in mm
p = 6  # pitch diameter in mm
d = 0.5774*p # best wire size in mm
print "Best wire size = %0.3f mm"%d
Best wire size = 3.464 mm

Exa 17.2 : Page 670

In [1]:
D = 20 # diameter in mm
p = 2.5 # pitch diameter in mm
d = 0.5774*p # mm
W = D+3*d-1.5156*p# best wire size in mm
print " Best wire size = %0.3f mm\n Distance over wires = %0.3f mm"%(d, W)
# Answer vary due to round off error
 Best wire size = 1.444 mm
 Distance over wires = 20.541 mm