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  • Bad pipe threads

    We have a 300 mach with an 811A threader that has recently began giving chipped threads on 1/2" black pipe. 1"-2" is fine. I bought new dies and still have the same problem. Any ideas?

  • #2
    with new dies, it sounds like you might have a poor grade of pipe. is the oil new? have you tried a different supplier of pipe? are the dies adjusted properly and in the right order?
    try this and see what results you get.

    rick.

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    • #3
      Thanks, it was the pipe. Don't know where it came from, but upon closer inspection, it looks more like chrome moly pipe than black pipe. Same OD, and a little lighter shade, but you have to look close to notice.

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