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Spur gear selection for parallel shafts

  1. Feb 8, 2010 #1

    I have a DC motor with 4mm diameter shaft, flat tip.

    How can I attach a 12 teeth pinion to this drive shaft?. I have been loking for pinions and gears on the web but they don't specify how are they attached to a shaft, as there are round shafts and flat tip shafts. Do I have to ask for gears with hub and set screw?

    Any help would be very appreciated.

  2. jcsd
  3. Feb 8, 2010 #2


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    Gold Member

    There are many ways to do it, one of the simplest would be a set screw in the gear's hub, like on this W.M.Berg gear:

    http://www.wmberg.com/catalog/photos/B05B065.jpg [Broken]
    http://www.wmberg.com/catalog/productsearch.aspx?url=http://wmberg.smartcats.com/sc_app/default.asp [Broken]
    Last edited by a moderator: May 4, 2017
  4. Feb 8, 2010 #3
    The set screw is a good option but, is there any stainless steel gear that matches a flat tip shaft like this?

    Attached Files:

    Last edited: Feb 8, 2010
  5. Feb 8, 2010 #4


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    Your question doesn't make a whole lot of sense. The flat is made for the set screw. Who/what are stanley steel gears?
  6. Feb 8, 2010 #5
    Thank you. I have seen some gears that have an opposite shape for flat tip shafts.
    PD: I'm sorry about the bad spelling.
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