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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 09-25-06, 06:49 PM   #1
surreal
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is this brother crazy?

check this out.

http://flickr.com/photos/mrwright/show/

i guess that's courage we're lookin at.

-rob
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Old 09-25-06, 07:11 PM   #2
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I'd be a bit iffy on using the Silver anywhere I have a wheel...and/or torque...I'm afraid to hammer my last bronze endevor....
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Old 09-25-06, 07:42 PM   #3
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what ??

you mean using silver instead of brass on the slotted dropouts where there's big gaps ??

i cant really see what's going on
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Old 09-25-06, 08:07 PM   #4
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ummmm, I don't get the "crazy" part. What's wrong with the photo sequence? It's very common to use silver to braze forks and the do's he's using are external socket types, so no big gaps to fill. I didn't look at all the photos, but judging from the look of the flux and the shorelines in the post braze shots, I'd say Mr. Wright knows his stuff.
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Old 09-26-06, 01:51 PM   #5
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i worry mostly about chris's dropouts, as i'm not sure that they'll handle the rigors of frequent urban fixed riding. but then, ive never made a frame, so what do i know? hence, the question? is he crazy? i mean, yeah, he's crazy. but, is there evidence of crazed behaviour and consequences in these photos?

-rob
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Old 09-26-06, 02:57 PM   #6
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S/M bike porn has arrived.

Last edited by zklone; 09-28-06 at 01:14 PM.
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Old 09-26-06, 04:27 PM   #7
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I guess I don't see what's wrong with the dropouts...
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Old 09-26-06, 04:29 PM   #8
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Neither do I. They look exceptionally clean and well done.
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Old 09-26-06, 06:23 PM   #9
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it's standard procedure to silver braze plug-in style ends, and the pics show one fork like this..
but there's also pics of rear dropouts and another fork which are slotted style...
it looks like he used silver here
since silver loses much of it's strength when filling a gap bigger than (i don't remember.. something like .3mm ??) most builders use brass filler for these kinds of joints..
maybe he used something different than 56% with better gap filling characteristics ??

why doesn't somebody just ask him ?
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Old 09-26-06, 08:54 PM   #10
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A good brazer (which this guy is) can fill a slotted dropout gap with 56% silver, but I'd bet he used 50n or some 45%, which would be much easier to fill the gap with and be a bit stronger. I used 50n on my first frame (slotted ends) and it's held up well to the "rigors of urban fixed riding".
What I liked most about the pic sequence were how tight the fit for the tires was, maybe not the best thing for street riding, but damn, it looks cool!
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Old 09-26-06, 10:25 PM   #11
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it would be a bad idea to use 56% here
it doesn't matter if you can get it to fill
it just won't be strong enough

i can't really think of a good reason to not use brass here
it's cheaper, and the higher temp will not matter in this area
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Old 09-27-06, 12:42 AM   #12
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Did he use the material of those two flat spoonlike thingies to make the plates for the track ends? They may well be stainless steel for all I know.
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Old 09-28-06, 12:25 PM   #13
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Someone started a thread about my build?

I used 56% on the track ends. what a pain in the ass. 56 flows much better than 45 or 40 so filling those gaps was tough.

For the fork (my fork, not zack's) I switched to 45%. That's what I plan on using for slotted style dropouts in the future. lumpier, and easier to fill gaps

As far as strength issues... there are none. as long as the joint is brazed properly.

The two spatulas were going to be cut-up and used for stainless faces, but my friend talked me out if it. I ended up ordering a sheet of stainless from mcmaster instead.

Ceeway has some crazy arrowhead lugs I want to build with. I can't wait

-Chris

(Surreal, I think you might be my co-worker)
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Old 09-30-06, 05:05 AM   #14
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Pins/nails on round blades and external sockets?!? Why? They're not going to move out of track or change angle, are they?
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Old 09-30-06, 05:03 PM   #15
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I like to braze from above my work. Gravity forces the silver to travel down the joint. Using a pin allows me to flip and turn the pieces however I want. If there were no pins, the metal would deform and throw the alignment off.
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Old 09-30-06, 05:29 PM   #16
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Old 09-30-06, 06:04 PM   #17
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yeah chris!

he built me a fork and it's the bessssst
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Old 10-01-06, 08:17 AM   #18
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chris teach me the ways
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Old 10-02-06, 12:27 AM   #19
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Quote:
Originally Posted by LoveParkRIP
I like to braze from above my work. Gravity forces the silver to travel down the joint. Using a pin allows me to flip and turn the pieces however I want. If there were no pins, the metal would deform and throw the alignment off.
Do you really think the socket is so slack to begin with and the heat will be so great, bearing in mind you're using silver, that the socket will deform and allow the blade to fall out of line in the socket? If the socket is a slack fit, just give it a few taps when cold with a pin hammer to tighten it up!

HEAT forces the silver to travel! Stand the blade/socket assembly in a vise, heat the socket first and the blade next, go in on one side with the silver and draw it round with the flame. That's it. Do the other blade and another half dozen of them in the time it takes you to drill, pin, braze, cut off the pin, file off remainder of the pin, etc.

Unless, of course, you like making more work for yourself.....
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Old 10-02-06, 12:33 AM   #20
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Quote:
Originally Posted by AfterThisNap
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Old 10-02-06, 10:11 AM   #21
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Thanks Neil.

It's just my preference. There's more than one way to join the pieces together.
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Old 10-09-06, 03:34 AM   #22
Neil H
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Quote:
Originally Posted by LoveParkRIP
There's more than one way to join the pieces together.
Agreed.
Hard way and easy way.
I know what one I'd choose!
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Old 10-09-06, 10:47 PM   #23
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ok hold up
cause now that mr. walker has weighed in i am getting truly confused...
here is a pic of a slotted dropout brazed with something silvery (i had no idea what mr. wright actually used, like i said before, but later in the thread he tells us it was 56)

but everything i have learned tells me that 56% is not a good idea when brazing fork ends in slotted stays

so what's what ?



Quote:
Originally Posted by Walkercycles
I saw nothing crazy in the sequence...56 will hold a gap wider than he had...

DW
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