4-start thread on a small lathe?
Brent Philion wrote:
As much as it sounds like a nice peice of machining what is a 4 start
thread used for?
The cap on a fountain pen is a common application (and why I cut 4
start threads). The cap will engage within a quarter turn, and it
doesn't take much turning to fully close the pen... something that is
done often enough to want the operation to be quick and reliable.
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