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  1. #11
    They call me Mr Bear. Stubear's Avatar
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    Thats really cool Dave!

    Great job!

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    Del1r1um (08-09-2010)

  3. #12
    aka shooter74743 ScottGoodman's Avatar
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    Hows the job hunt going?
    Southeastern Oklahoma/Northeastern Texas helper. Please don't hesitate to contact me.
    Thank you and God Bless, Scott

  4. #13
    Comfortably Numb Del1r1um's Avatar
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    Quote Originally Posted by shooter74743 View Post
    Hows the job hunt going?
    It's going ok I suppose... had four interviews this week (two of those were the 2nd interviews BTW ).. So, we are just doing what we can in the meanwhile. Thanks for asking...

    Now to answer some questions on the grinder... I would plan on making a permanent mount with a better shaft/bearing system in order to increase stability. But I really do think that it will be necessary to cast a flywheel to keep this sucker going for a grinding session.

  5. #14
    Senior Member blabbermouth Geezer's Avatar
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    Totally off the wall in keeping with the thread.
    Why not use the rear part of a kids' bicycle to hold the wheels. Use the chain, sprockets, and pedals to drive it. Leave enough of the rest of the frame to cast into a concrete base using a ready mix type product?
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    - Oscar Wilde

  6. #15
    Comfortably Numb Del1r1um's Avatar
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    I actually had designed something like this as an alternative, but I also wanted to test the treadle concept... either way, I really think you'd need to have a heavy flywheel to keep things turning.

  7. #16
    aka shooter74743 ScottGoodman's Avatar
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    The second interviews always made/made me feel like I have a good chance at it. I hope you knocked their socks off!
    Southeastern Oklahoma/Northeastern Texas helper. Please don't hesitate to contact me.
    Thank you and God Bless, Scott

  8. #17
    Senior Member deighaingeal's Avatar
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    For a cheap heavy flywheel look into an exercise bike. I have made a lathe for a friend using a frewheel and a spring so the chain passes over the freewheel on the exercise flywheel then the end of the chain is attached to a treadle. The other end of the chain is attached to a door spring to spring the chain back for the next push. If i get to the other side of the state this summer I'll take a pic and send it your way.

  9. #18
    Comfortably Numb Del1r1um's Avatar
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    Perfect, that would work really well. Thanks for the idea.

    Dave

  10. #19
    Senior Member blabbermouth Geezer's Avatar
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    +1
    ~Richard
    Be yourself; everyone else is already taken.
    - Oscar Wilde

  11. #20
    Senior Member ignatz's Avatar
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    As my father always says to me, "Don't reinvent the wheel".

    I go along with Geezer's approach to your question. Using parts of bicycle frames, chain drives and freewheels are probably a much better bet than what you now have.

    For a bit of inspiration I give you the following links:

    12 Knife Bikes

    1940s/1950s Knife Sharpener Bicycle (Gundle?) « Museum of Tradesman’s Delivery Bikes

    DIY gadgets in Africa: the knife-sharpening bicycle - Boing Boing

    bicicletta dell'arrotino - knife-grinder's bicycle | Flickr - Photo Sharing!

    KNIFE GRINDER (issue title SEE HOW THEY RUN) - British Pathe

    YouTube - Afrigadget: A bicycle powered knife-sharpening machine


    YouTube - Bicycle knife sharpening



    Cheers,

    - Ignatz
    Last edited by ignatz; 08-14-2010 at 12:36 PM.

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    Geezer (08-14-2010)

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