Home made jackshaft?

Discussion in 'Motorized Bicycle General Discussion' started by Adam F, Apr 29, 2010.

  1. Adam F

    Adam F New Member

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    Hey all,

    I really am interested in the jackshaft idea. As I have a spare Grubee HD rear axle I am just wondering of this could be turned into a jackshaft?

    As this is supposedly hd with twin roller bearings it should stand up to the torque?

    This is a picture of another home made jackshaft that sort of leads me to think this can be done - this seems to use a large sprocket on one end and a small one the other - this could lead to some space issues?

    http://www.schwinnbike.com/usa/eng/forums/attachment.php?attachmentid=73610&d=1202970869

    Any thoughts on the viability would be good.

    Cheers
    Adam
     
  2. flybytaco

    flybytaco Metal Molding Madman

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    wow that pic is wild setup someone spent some time on that project
     
  3. kicking

    kicking New Member

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    OMG lol it is fancy though ! just dont get your

    OMG lol it is fancy though ! just dont get your pants leg near it .. i would spend more money on b.c powder than on this project .. this art peice should be called the ""octopus "" very advanced work !!
     
  4. 2door

    2door Moderator
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    Looking closely I don't think that star shaped thing rotates. It looks more like some kind of decorative washer. But...if it does turn, that is an accident waiting to happen. Otherwise there is some nice engineering on that rig. I'd like to know how it performs and how much he spent on parts.
    Tom
     
  5. charles.paskell

    charles.paskell New Member

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    The STARLIKE thing you are referring to is a bmx chain tensioner And NO it dosent turn....I thaught you guys were bike guys......and your a moderator........sorry if ive offended anyone but im starting to question the advice from some of the people here.....
     
    #5 charles.paskell, Apr 30, 2010
    Last edited: Apr 30, 2010
  6. Maxvision

    Maxvision New Member

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    Now, now, don't be dis'in a moderator. You might find yourself on the outside lookin' in...

    Also, I doubt most people on here know much about BMX bikes.
     
  7. charles.paskell

    charles.paskell New Member

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    I dont believe ive dissed on anyone I just thought someone would know a Chain tensioner when they see one... Im sorry for assuming that. MY BAD
     
  8. BarelyAWake

    BarelyAWake New Member

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    I don't think there's a moderator here that wouldn't admit there's still stuff to learn... in fact the second anyone claims to know everything about anything is when you should start wondering.

    If you actually read Tom's post, he was questioning - not advising.

    We all have our lil niches of expertise, the trick is to keep an open mind & recognize when something doesn't fall into that niche and question it, dare to admit ignorance - this is how we learn.

    Those that "know it all" learn nothing.
     
  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I know everything about anything.

    I thought that was obvious.....I'll try harder to make that clear in the future.
     
  10. Creative Engineering

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    I couldn't resist...I had to google this one.

    MISC CHAINTENSIONERS Bullet Spur Chain Adjusters

    Looking at the photo in the original post, it is hard to tell what it is!

    Jim
     
  11. GeneFiorot

    GeneFiorot New Member

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    Yea we got that, no problem dude. wheew
     
  12. rockhopper

    rockhopper New Member

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    Well I thought it was funny.
     
  13. GearNut

    GearNut Active Member

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    Dood, I have been tinkering with bicycles for 30 years and this is the first time I have seen one of those thingies.
    BMX is not my forte, tinkering is.
    Thank you very much for teaching us all about a new fangled doohicky that is used on modern racing bicycles. I mean that sincerely.
    It looks like an excellent, easy way to tension a home made chain arrangement. :)
     

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