I had hoped all the reading would help but in some ways, "...a little knowledge is a dangerous thing...".
In this particular case it involves the uses for right hand vs. left hand screws.
Lead screws seem to be largely right hand though some are left.
Every lathe cross slide I have seen referenced or seen is left hand and lathe compounds right hand and the tailstock I have is left hand.
The main table on the horizontal mill is left hand thread, are some right hand?
My impression was it has to do with acting against prevalent forces or a particularly handed thread for a particular reason [the bottom bracket and pedals on bicycles springs to mind as with the pedaling motion it is possible to unscrew parts and there was a reason given as one direction draws water (i.e. wet conditions) in whereas the opposite pushes it away]
What is the logical/science behind which hand of thread is used where? Does speed play a role? Or does force of gravity in the case, say of mills
In this particular case it involves the uses for right hand vs. left hand screws.
Lead screws seem to be largely right hand though some are left.
Every lathe cross slide I have seen referenced or seen is left hand and lathe compounds right hand and the tailstock I have is left hand.
The main table on the horizontal mill is left hand thread, are some right hand?
My impression was it has to do with acting against prevalent forces or a particularly handed thread for a particular reason [the bottom bracket and pedals on bicycles springs to mind as with the pedaling motion it is possible to unscrew parts and there was a reason given as one direction draws water (i.e. wet conditions) in whereas the opposite pushes it away]
What is the logical/science behind which hand of thread is used where? Does speed play a role? Or does force of gravity in the case, say of mills
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