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  1. E

    broken tap in aluminum casting

    if you have a mill you can use a .093 - 4 flute carbide end mill to ever so gently and slowly raise the knee to mill the tap out. The end mill will probably be junk when you are done and you will still have to knock the teeth from the tap out of the hole. Make sure you use lots of cutting fluid.
  2. E

    where should I start?

    Hi, Just thought I'd introduce myself - I'm Eric. I'm a machinist in AZ. I was wanting to build a combustion engine but I think maybe I should start with a compressed air engine. Maybe I could get some recomendations on which would be a good starter project and where I can find the plans. Thanks.
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