Frame Jig on the cheap

Discussion in 'Motorized Bicycle General Discussion' started by culvercityclassic, Feb 25, 2011.

  1. culvercityclassic

    culvercityclassic Well-Known Member

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    Frame Jig

    This is my attempt at a jig to build my own custom frames. I cleaned out the garage and found all this material left over from a HVAC job I did last year when the economy was good. The jobs are hit and miss now. Ok, back to the jig. If I had to guess it’s about 100.00 to 150.00 worth of material to complete and is fully adjustable. I am sure I will need to modify it a little but it looks like it will work.

    Building this was like a flash back 40 years ago...Erector Set... just find the part and bolt it together...I was a kid at heart for a few hours then reality set in...Wow that was a trip....


    I went to the local metal supply and looked over tubing and was surprised at the prices; 5/8 .065 was 20.00 for 20 feet and 1 1/8 was a little more. chromoly tubing was somewhere around 50.00 for the stick. I would end up making the frame out of chromoly. It welds so much nicer. I figure I could build a frame for under a 100.00.

    Now the hard part is designing what I want to build…what I need to do is get my mind away from the style I always gravitate to…
     

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  2. The_Aleman

    The_Aleman New Member

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    Awesome work, you make it look so easy! Lots of potential in that jig, IMHO

    I say pick up a pad of .250 block graph paper from your local CVS and get to doodling :D
     
  3. flybytaco

    flybytaco Metal Molding Madman

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    sweet how much to build and ship me one or even plans
     
  4. Dan

    Dan Staff
    Staff Member

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    Awesome Culver. And it's mobile! Really nice and useful touch. (Just realized it might be placed on the cart just for pics) Can't wait to see more pics and your first use.

    Great job.
     
  5. culvercityclassic

    culvercityclassic Well-Known Member

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    I added some more pictures to show the material I used to make the jig. The metal is uni-strut, as you can see I am able to move my setups within the track system by loosening one bolt that is connected within the track with a spring nut. My alignment is all taken off the main piece of strut. I have set-up the rear drop out as a mock up. One of the pictures shows how it can fold up and may be leaned against a wall for storage. I now have it on a table so I can work on it with ease.

    Flybytaco...I know you could build your own...bro...

    Well off to the drag races at Pomona……no rain no rain no rain.wee.
     

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    #5 culvercityclassic, Feb 26, 2011
    Last edited: Feb 26, 2011
  6. flybytaco

    flybytaco Metal Molding Madman

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    I'll buy plans if you wanna draw some up i can def build it
     
  7. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    I think you should build a super long 'ground dragger' stretch cruiser!
     
    #7 Venice Motor Bikes, Feb 26, 2011
    Last edited: Feb 26, 2011
  8. flybytaco

    flybytaco Metal Molding Madman

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    hey culver where can i get that uni strut? i def get the idea on how to build it
     
  9. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    I think you can find it at Home Depot?
     
  10. flybytaco

    flybytaco Metal Molding Madman

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    nope i went there all they had were simpson strongtie L brackets that would work mint with some drilling.
    btw that is definately a great design i love it i can also see some sick dropped long frames come off that thing
     
    #10 flybytaco, Feb 26, 2011
    Last edited: Feb 26, 2011
  11. flybytaco

    flybytaco Metal Molding Madman

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    what is the long piece going upwards twords the back?
     
  12. sportscarpat

    sportscarpat Bonneville Bomber the Salt Flat record breaker

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    Nice start on the jig. I found that once you get a frame all clamped into the jig it get's very heavy. Then you constantly have to move it around to get the best possible position to weld in. I finally mounted mine to an automotive engine stand. Now I can roll it around and rotate the frame and jig easily to get the best possible brazing and welding positions. Before I did that building frames was back breaking work.
     
  13. flybytaco

    flybytaco Metal Molding Madman

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    I get so much more satisfaction building my own stuff. like the frame i'm building now with full suspension. I wouldnt be into this hobby if it were just about slapping a kit in a beach cruiser.
     
  14. culvercityclassic

    culvercityclassic Well-Known Member

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    Hey Taco send me a PM and I will help you get this together...If you need so i can set you up with a contact thats local to you.
     
  15. culvercityclassic

    culvercityclassic Well-Known Member

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    Nice idea Pat, that looks like a good setup.

    Just one question? are you brazing all your frames?
     
  16. bairdco

    bairdco a guy who makes cool bikes

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    taco, most good hardware stores should carry it. i've found it at Home Depot, Lowes, Ace, Grainger, and even at friggen Walmart.

    used tons of it when i was climbing towers for cable bridges, mounts, etc.

    or go to the source and find a distributor:

    http://www.unistrut.us/index.php?WP=contact_locate_us
     
    #16 bairdco, Feb 27, 2011
    Last edited: Feb 27, 2011
  17. flybytaco

    flybytaco Metal Molding Madman

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    i went to home depot yesterday baird and all they had was l channel with holes and shelving track
     
  18. sportscarpat

    sportscarpat Bonneville Bomber the Salt Flat record breaker

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    Lug and fillet brazing on the frame tubes. Fillet brazing is far more challenging. All engine mounts and brackets are tig welded as bronze is more susceptible to vibration cracking. You probably should double up your base piece of unistrut as it will have to control the twisting forces of the entire frame. Also, never force a frame into a jig. It needs to be carefully fitted without loading up any of the tubes, otherwise when you pull it out of the jig it can distorte. Building frames is actually easier than building gas tanks. Good luck.
     
  19. flybytaco

    flybytaco Metal Molding Madman

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    I bet it is pat, tanks are the most challenging things ive built!!
     
  20. harry76

    harry76 New Member

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    Good idea with the engine stand so you can spin it, but i cant imagine how youd do it and be strong enough..... could you post a picture?

    CCC, how has this jig held up and have you changed it any?

    I want to start building my own frames too.
     

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