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  #11  
Old 03-04-2020, 10:01 PM
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clive clive is offline
 
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Originally Posted by GWIZ View Post
It should be on center or 0.005 above.
if it is below the part will try to roll over the top of the tool and then pull it into the part,
say you have 0.010 of back-lash or "more" in your cross-slide the rollover will pull in all the back-lash at once and you will snap the tool.
My lathe used to do that so I mounted the parting blade upside down and run it in reverse, haven’t broken a blade in 4-5 years since.
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  #12  
Old 03-04-2020, 10:33 PM
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Originally Posted by KevinF View Post
It doesn't really matter. I did a thing that I was proud of and shared. It will hopefully work for its intended purpose. I am aware of the benefits of a qctp holder but it is not in the cards for this machine which might turn a puck from plastic or a small bushing once per year.
Pride in your own craftsmanship is a badge I have found few can wear.
Wear yours with honour.
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  #13  
Old 03-05-2020, 03:54 AM
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On hardened die pins they used to trim by running under center .
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