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  1. #101
    Senior Member hellojoben's Avatar
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    wow. I have so much respect for the framebuilders out there.

    If any of you guys are in need of an apprentice and live in Los Angeles let me know!


    hhaah

  2. #102
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    BB30!!

    bb30 by stanridgespeed bicycles, on Flickr

  3. #103
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    Guys have a question, after you guys have brazed, basically each brazing point needs to be put in some like ACID to clean all the impurities off the steel. Some people uses battery acid but doubt thats green at all, what you guys use??????? There is something non toxic that can be used at home for example?

  4. #104
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    I use a special solution made up of two parts hydrogen to one part oxygen. It's generally thought to be benign to humans, but in very large quantities it has been linked to numerous human deaths, so caution is justified. I find it especially helpful to use the solution while it is in a relatively excited state, so if you can find a way to add energy to the compound, flux removal will be hastened.

    If you're unable to find a source for the compound, hot tap water may work too.

    HTH!

  5. #105
    Senior Member mudboy's Avatar
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    650b wheeled path bomber, sloping top tube, 73 parallel, 425mm stays.













    --~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--
    Ruckelshaus Randonneur Ruckelshaus Path Bomber
    Flickr Photostream
    FrameBuilderSource.com Framebuilder Database

  6. #106
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    Build sequence on Flickr


    dec6.10 by stanridgespeed bicycles, on Flickr



    dec6.8 by stanridgespeed bicycles, on Flickr

    Hey guys im documenting a build for a client. the build starts at DEC3. Any questions? Dont hesitate to ask!

  7. #107
    Administrator Allen's Avatar
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    Adam, may I ask you to start a thread on this build?
    Even if it's just a sequence of images. Good stuff.

    Cheers,

    --A

  8. #108
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    wow there's some beautiful stuff posted up on here,

    here's my fledgling first effort


    58cm square
    Columbus Zona tubing
    brazed with 55% silver rods using using a rothenberger superfire 2 MAPP torch
    one coat rattle can black paint job


    1 low res by adam.haycroft, on Flickr


    2 low res by adam.haycroft, on Flickr


    3 low res by adam.haycroft, on Flickr


    4 low res by adam.haycroft, on Flickr


    5 low res by adam.haycroft, on Flickr

  9. #109
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    ironcroft, that looks pretty nice. how does it ride? did you use a jig?

  10. #110
    Senior Member mudboy's Avatar
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    Man, my second build is turning out to be more error-filled than my first. Of course, I'm doing almost all of the work on my own, but still...

    * Need to go back and re-braze 2 bottle bosses because of gaps
    * Gap in the top of the seat lug needs to be filled
    * Gaps in 2 places on the top head tube lug need to be filled
    * Mis-measured when I cut the chainstays, bringing them in to 417mm instead of the originally designed 425mm. Still have clearance, but still.
    * Fit the brake bridge with 132.5mm dummy axles in place (I have a jig that fits on the dummy axle to locate the bridge), when the spacing is going to be 135mm. So, it's either put the bridge 2mm or so higher up on the stays, or get another and re-do. Still gives me plenty of brake adjustment, but still...
    * Hit one fork blade (1.1mm) with the file the wrong way, leaving a slight divot
    * Used too-thin sheet steel (21ga, I think) for my semi-wrap seatstay caps, so they're slightly distorted.
    * The double eyelet fork ends didn't fit in the blade raker, so I had to cut one off of each.
    * The headtube cable stops kept the frame from fitting properly in my mentors home-built jig, so I had to cut them off.

    On the plus side, this is going to be a pretty utilitarian frame for riding to the store and riding around the neighborhood with my kids, so none of these issues are really critical, but still, my first frame went so well that I had some pretty high hopes for number 2. Also, I'm really going to be the only person who's going to notice any of these issues, but still...

    Pete
    --~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--
    Ruckelshaus Randonneur Ruckelshaus Path Bomber
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    FrameBuilderSource.com Framebuilder Database

  11. #111
    Senior Member
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    Quote Originally Posted by AllenG View Post
    Adam, may I ask you to start a thread on this build?
    Even if it's just a sequence of images. Good stuff.

    Cheers,

    --A
    Allen, In the swing of things again after the holiday season! I sure will do it if you'd like. I'm constructing the fork tomorrow.

  12. #112
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    hey mud! Whats up bud. Don't get discouraged. Why did you drill a hole in the TT above? Heat escape? It may be easier if you drill it in the ST under the lug junction..save a bit of time ya know..

  13. #113
    Senior Member mudboy's Avatar
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    Yeah, it's a vent hole, I'll put a drop of silver on it once I get the cable stops on. Next time around I'll probably drill a small hole in the headtube where it intersects with the top tube, unless the seat tube is a better choice.
    --~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--
    Ruckelshaus Randonneur Ruckelshaus Path Bomber
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  14. #114
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  15. #115
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    I'd be afraid that the seat would slide my customer into the steerer tube, possibly catching on one of his facial piercings.

  16. #116
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    Im still chuckling a bit from six jours comment,

    I love this bike I think you should build a combined stem and aero handle bar for it,

    What tube set is this?

    Did you have to form the clearance cut-out for the back wheel in the seat tube or do the tubes come like that?

  17. #117
    Senior Member scbvideoboy's Avatar
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    Something a little different...my homebuilt FWD tadpole recumbent trike. On this prototype the front and rear frame sections made out of 4130 cromoly and the center part is aluminum. I did all the fabricating and machining including the internal differential.





    Two powdercoats colors and some chrome as well. The next "production" trike will be all aluminum with selected areas for chroming and more!

    Dave aka scbvideoboy

  18. #118
    Administrator Allen's Avatar
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    That's seriously impressive.

  19. #119
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    The upper picture makes my brain hurt. And right in the middle of the most complex machine this side of the Large Hadron Collider sits a Super Record derailleur!

  20. #120
    Senior Member mudboy's Avatar
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    Wow, that's awesome. Almost awesome enough to make me consider riding a 'bent. Almost.

    Finished frame 2 this week. It was a bit of an experiment in design, I wanted to build a 650b shopping/gravel path bike, but I also wanted to be able to run 700c wheels if I didn't like 650b. Geometry ended up at 73 parallel (though the seat tube looks slacker due to the sloping TT), 45mm rake for something like 56mm trail, 68mm BB drop (frame 1 was 75mm), and 417mm chainstays. They were supposed to be 425mm but I f*cked up. Anyway, pics with wheels and headset installed:

    650x42mm:



    700x28:



    Of course, I'd need to use different brake calipers when I do the wheel swap, but I have the SRAM Apex calipers that came with my new group, and I bought a set of Tektro long reach for use with 650b.

    I trimmed the seat tube, shaped the seat lug, and cut the slot over the weekend. I've got some minor cleanup to do with cloth and file, and then it's off to Fresh Frame for a coat of gunmetal grey metallic paint.

    Complete album.

    Pete
    --~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--~--
    Ruckelshaus Randonneur Ruckelshaus Path Bomber
    Flickr Photostream
    FrameBuilderSource.com Framebuilder Database

  21. #121
    weirdo
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    Quote Originally Posted by Six jours View Post
    The upper picture makes my brain hurt.
    Haha! I bet your brain doesn`t hurt as much as his did while he was trying to sort things out! I semi followed his build on BROL, so I know it was definitely a challenge.

    Good job, SCV- I`m glad you finally get to reap the fruits of your efforts!

  22. #122
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    that's a trick trike, scbvideoboy. does the rear wheel have suspension also? is there a sliding spline somewhere in that drive shaft to handle suspension movement? i couldn't spot it. nice work.

  23. #123
    Senior Member scbvideoboy's Avatar
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    Thanks guys!
    And right in the middle of the most complex machine this side of the Large Hadron Collider sits a Super Record derailleur!
    Is that a good thing?
    The 7 sp freewheel is NOS so I used stuff lying around. The "NEW" trike will have a Shimano cassette freehub mounted on the diff. Looking forward to Dura Ace 8/9 sp setups!

    is there a sliding spline somewhere in that drive shaft to handle suspension movement
    Under the rubber boot next to freewheel, sliding ball coupler...similar to the inside of a inboard CV joint on a FWD car.

    Dave aka Scbvideos

  24. #124
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    Quote Originally Posted by Six jours View Post
    I use a special solution made up of two parts hydrogen to one part oxygen. It's generally thought to be benign to humans, but in very large quantities it has been linked to numerous human deaths, so caution is justified. I find it especially helpful to use the solution while it is in a relatively excited state, so if you can find a way to add energy to the compound, flux removal will be hastened.

    If you're unable to find a source for the compound, hot tap water may work too.

    HTH!
    Yes, DihydrogenMonoxide... Use carefully.

  25. #125
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    Quote Originally Posted by scbvideoboy View Post
    Is that a good thing?
    As far as I'm concerned, it's a great thing!

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