Threading question...
I need one piece of a threaded blind hole, with as little wasted space as possible at the bottom of the hole. Don't want to turn forwards, doing multiple passes I will surely crash on the bottom of the hole. If I turn the threading bar over and cut the back side in reverse I can work towards the open end. But I'm not sure if the toolpost etc. will take upward force without deflection.
No risk to try it, the workpiece is just a chunk of round bar. On the other hand, I could still crash it while resetting for the next pass, but I'm usually not that clumsy if I don't overdo the coffee.
I can afford maybe 1/4in. gap at the blind end, so maybe should just do it forwards with care. Its about 1-1/4 ID, 12TPI, on a Clausing C1440S.
I need one piece of a threaded blind hole, with as little wasted space as possible at the bottom of the hole. Don't want to turn forwards, doing multiple passes I will surely crash on the bottom of the hole. If I turn the threading bar over and cut the back side in reverse I can work towards the open end. But I'm not sure if the toolpost etc. will take upward force without deflection.
No risk to try it, the workpiece is just a chunk of round bar. On the other hand, I could still crash it while resetting for the next pass, but I'm usually not that clumsy if I don't overdo the coffee.
I can afford maybe 1/4in. gap at the blind end, so maybe should just do it forwards with care. Its about 1-1/4 ID, 12TPI, on a Clausing C1440S.