Thread: Newbie help hole boring
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11-05-2018 #1
Hi guys
I have a hobby mat mini lathe im pretty new to using it.
Im trying to bore a nice smooth hole which is fairly deep but i cannot get a smooth finish.
The outside finish is really nice. if i reduce the length of the boring bar i.e bringing it closer to the tool post the finish improves. Ill upload some images later you can see what i mean.
My question is really if i am using the correct type of boring bar or if there is a way easier way of getting the nice smooth interior finish.
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11-05-2018 #2
What material are you trying to cut, if it's aluminum you might be best with a HSS tool as opposed to the tipped tools.
Regards
Mike
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11-05-2018 #3
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11-05-2018 #4
Yes tool needs to be @ centre height,would still use HSS tool.I tend to run a fairly slow speed to prevent vibration in the boring bar,when you get to the bottom of your bore reverse the feed and you will find it will probably take a fine cut on it's way out. some sort of cutting oil will help.
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11-05-2018 #5
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11-05-2018 #6
Try 250 see how it goes, it's a bit of trial and error depending on material/machine stiffness ect. just have a play
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