Hardinge HC-AT Questions
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  1. #1
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    Default Hardinge HC-AT Questions

    Anyone here have experience running a Hardinge HC-AT? I have mine powered up with air connected. It seems to be doing its thing but I don’t see how you adjust the amount the tool is advanced with each pass. It always seems to do 10 passes, so of course the advancement with each pass would be different for each thread pitch. I’m wondering the following. What is this knob for? Turning it seems to have no effect.

    Also what is this graduated dial for?

    And lastly how does this mechanism engage and what does it do?




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  2. #2
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    I have an original Hardinge 44 page booklet on how to operate the automatic and manual chucker threading attachments. I will sell the original, not a copy, for $25 including postage.

    The knurled knob sets the number of passes to the normal number or to half that. The white dial sets the normal number of passes and the single depth of thread. The book has tables of what settings to use for various pitches and materials. For instance, if the white dial is on 14, there will be either 10 or 5 passes and the single depth will be .014 inch.

    Larry

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    I’ll take it. Let me know how to pay.


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    I sent a private message with the payment information.

    Larry

  5. #5
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    Got the booklet today. It answers a few questions and will be a helpful operation manual but I still have problems with the machine and would like to hear from anyone that has worked on one of these. For example: is the white dial supposed to rotate a bit with each pass? Mine does not and the tool is not advancing with each pass. Something is jammed up inside probably. Not obvious how it comes apart.


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