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Hobbing Attchment

Discussion in 'MACHINE ACCESSORIES (Tables, Vises, Indexers)' started by Maurice, Dec 9, 2016.

  1. Maurice

    Maurice Canada Swarf Registered Member

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    City:
    Shediac
    State:
    New Brunswick
    I teach at a local community college and we have a hobbing attachment for a correa horizontal mill with no instruction how to set this up would anyone have any information on this . Mostly on how to set up gear ratio. From the picture I have, I think we could hook it up but I'm not sure about how to set up the gears. Any info would be a start.
    Thanks
    Maurice
     
  2. Chipper5783

    Chipper5783 Active User H-M Supporter-Premium

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    City:
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    Hobbing? Or are you simply referring to a spiral (helical) milling attachment?

    There are some nice you tube videos ("Littlest Hobber") to learn more about gear hobbers. If you are just looking for the ratio calculation for a spiral milling unit then you can use most any manual, figure out the ratio for your machine (ie. do you have a 40:1 head, 5 tpi lead screw etc). The manuals provide a chart (which probably won't work for you) and the formula to apply for off chart ratios. Once you have the constants for you machine, the formula ought to work fine and you can make your own chart.

    Let us know how you make out. Regards, David
     
  3. Billh50

    Billh50 Active User H-M Supporter-Premium

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    There are some UTUBE videos on hobbing with a horizontal mill. Here is a link to one.
     

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