Tool life 1/4-20 form tap in 6061?
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  1. #1
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    Default Tool life 1/4-20 form tap in 6061?

    I have tapped thousands of holes with a 1/4" - 20 form tap in 6061 and it seems to be still tapping fine how often do you change them out. The holes seem to be fine but I am thinking I should change it just because it has tapped so many holes. Flood coolant in Sharp VMC.

    Happy Thanksgiving.

  2. #2
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    I would keep using it until your no-go gage says otherwise. Even then, it should be a simple matter to remove the built-up aluminum from the tap and put it back into service for another 10k holes ...

    Removing aluminum from end mill

  3. #3
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    Quote Originally Posted by gundog View Post
    I have tapped thousands of holes with a 1/4" - 20 form tap in 6061 and it seems to be still tapping fine how often do you change them out. The holes seem to be fine but I am thinking I should change it just because it has tapped so many holes. Flood coolant in Sharp VMC.

    Happy Thanksgiving.

    Funny... I've thought the same thing with the same tool. I decided to just keep using it. But like mbraddock said, if it won't gage right, then you'll know you've finally got toast.

    Dave

  4. #4
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    Check your minor diameter in addition to gage
    It will last forever but first thing to go is the minor won’t roll down to size


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