SOLUTION: a piece of cast iron 6 inches in diameter is to be turned in a lathe with a cutting speed of 90 fpm. at what speed must the work be rotated?

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Question 1092877: a piece of cast iron 6 inches in diameter is to be turned in a lathe with a cutting speed of 90 fpm. at what speed must the work be rotated?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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a piece of cast iron 6 inches in diameter is to be turned in a lathe with a cutting speed of 90 fpm.
at what speed must the work be rotated?
:
find the circumference of the piece
C = pi%2A6
C = 18.85 inches
Convert to feet
18.85/12 = 1.57 ft
:
Find the no. of rev equals 90 fpm
90/1.57 = 57.325 rev/min is the speed of rotation required