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#1
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Brake Boss Welding
I'm finally thinking of putting brake bosses on my MUni. It's a hard decision because it's so beautiful as it is, and I would hate to ruin that. However-- I've noticed that the most tiring thing for me on my rides are the downhills, and I want to reserve my strength for other parts of the ride. So I'm considering welding on brake bosses. I've got a question about welding. My SHaKH NaS MUni is stainless steel, and I was told that if I wanted to weld to hold, I'd have to use like metal for the bosses as well. Is there any truth to that? Will I have to get stainless steel brake bosses? I know nothing about welding, so any help would be great. -- paco - Creator of the "BUni" "One thing is for sure. Inspector Clay is dead. Murdered. And -somebody's- responsible!" -Plan 9 From Outer Space ------------------------------------------------------------------------ paco's Profile: http://www.unicyclist.com/profile/3715 View this thread: http://www.unicyclist.com/thread/27401 |
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#2
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Brake Boss Welding
We had a situation at work where a cast iron plug was welded to a steel tank and it never did stop cracking. The problem is the different temperature expansion rates, if you can find a material with the same coefficient of expansion, it should be ok. Although, you might have to get the same alloy stainless. -- brian.slater - Nellfurtiti, the Wonder Cat Brian C. Slater AKA: Snoopy Ok, I am now officially in my normal state of -advanced- confusion. Don't try to confuse me, it won't make any difference. "To not decide is to decide" - undecided ------------------------------------------------------------------------ brian.slater's Profile: http://www.unicyclist.com/profile/3902 View this thread: http://www.unicyclist.com/thread/27401 |
#3
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Brake Boss Welding
S_Wallis wrote: *If I happen to install brakes before then, however, there will be no need for such a ridiculous rule. * AHA! That's right! Why penalize people for having brakes? They spent the money, went through whatever setup and adjustment hassles, and, remember, they have to carry the extra weight on all the uphills. Downieville is a great place for brakes, but we'll be fine without them. But the ride is on Sunday on purpose; you might be pretty tired on Monday! -- johnfoss - Now riding to work John Foss the Uni-Cyclone www.unicycling.com ________________ "Where's my kids?" -- Amy Drummond "Where's my unicycle?" -- Andy Cotter spoken one right after the other, mostly to themselves, at NAUCC 2003 ------------------------------------------------------------------------ johnfoss's Profile: http://www.unicyclist.com/profile/832 View this thread: http://www.unicyclist.com/thread/27401 |
#4
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Brake Boss Welding
Paco - Your frame is common 300 series stainless steel. TIG welding carbon steel brake bosses (what most bike brake bosses are) to the stainless will be no problem as long as the filler rod that the welder uses is stainless steel. Filler rod is what's melted during the welding process to fill the gap or create a fillet between the parts that are being joined together. Stainless brake bosses would be cool since they would never rust but would have to be custom made I'm sure. Are you thinking of adding v-brake bosses or hydraulic Magura brakes? I've read that v-brakes don't work well for MUni because the wide rims and tires we use make the v-brake arms stick out to get pushed and snagged on things making the brakes activate when you don't want them to. Steve Howard -- showard - ------ ------------------------------------------------------------------------ showard's Profile: http://www.unicyclist.com/profile/452 View this thread: http://www.unicyclist.com/thread/27401 |
#5
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Brake Boss Welding
johnfoss wrote: *Why penalize people for having brakes? They spent the money, went through whatever setup and adjustment hassles, and, remember, they have to carry the extra weight on all the uphills.* I don't know about you, but I'm planning on -riding- up the uphills! Steve, Thanks for responding. I would have e-mailed you, but I thought this might come in handy for someone else, too. I'm thinking of using the V-brakes. The hydraulics seem a little out of my price range, but I'm only using a 2.6" tire, so hopefully it shouldn't be as big of a problem. I really hope I'm doing your frame justice. -- paco - Creator of the "BUni" "One thing is for sure. Inspector Clay is dead. Murdered. And -somebody's- responsible!" -Plan 9 From Outer Space ------------------------------------------------------------------------ paco's Profile: http://www.unicyclist.com/profile/3715 View this thread: http://www.unicyclist.com/thread/27401 |
#6
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Brake Boss Welding
Paco, what you want is this kit:
http://www.unicycle.com/Shopping/shopexd.asp?id=549 Make sure you weld them on as your frame-maker has described and you'll love it. The brake you want is http://www.unicycle.com/Shopping/shopexd.asp?id=520 - you won't have to use the booster with this setup so no worries with a 3" tire. See you in Oct! ---Nathan PS The no-welding solution http://www.unicycle.com/shopping/shopexd.asp?id=566 is a very low-end piece of equipment that you won't like long term. Although if on an extreme budget it could be used until the real hydraulic solution is affordable. |
#7
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Brake Boss Welding
Hey Paco, If you'd rather use Maguras, I have a set that I bet I can fit into your "price range" -- Krashin'Kenny - Crash Tested If you ain't crashing, you ain't going fast enough!!!!!! ------------------------------------------------------------------------ Krashin'Kenny's Profile: http://www.unicyclist.com/profile/3420 View this thread: http://www.unicyclist.com/thread/27401 |
#8
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Brake Boss Welding
and one more question about the practicality of brakes, don`t you have to realy make sure that your rim is perfectly true?, i ride my trials unicycle with a realy bent and bashed monty rim thats currently splitting arround the spoke nipples, it is no longer posible to true it properly, if i was riding a 24 i`d have to replace the rim as soon as it became untruable, it would be kind of iritating having to treat a bad boy 24 muni with kid gloves just so i could use the brakes, -- evilewan - death or glory -- evilewan. see the rec.sport.unicycling maintainance FAQ @ http://evilewan.unicyclist.com/ ------------------------------------------------------------------------ evilewan's Profile: http://www.unicyclist.com/profile/1047 View this thread: http://www.unicyclist.com/thread/27401 |
#9
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Brake Boss Welding
paco wrote: *Has anyone had any problems with the Magura Hydraulic brakes or the braze-on kit? I don't know of too many other options (from unicycle.com, at least). * I haven't had any problems with either. I welded on a Magura brake mount kit to my Hunter. Reminder though, figure out the rim width you will be using. Magura recommends 90 MM spacing, I found this to not be enough (using Azonic Momentum 44MM rim) for wider rims. My KH pro measures 98MM. Ended up having to cut the ones off my frame an hour after I painted it. Another recommendation, get the 90 degree kit for the hose at the lever. You can direct the hose a little better and it will be shorter. It is a pain to put together though. +----------------------------------------------------------------+ | Attachment filename: mvc-027f.jpg | |Download attachment: http://www.unicyclist.com/attachment/159200| +----------------------------------------------------------------+ -- Dirtsurfer - Singlewheel/Singletrack "All we have to decide is what to do with the time that is given to us." Gandalf the gray ------------------------------------------------------------------------ Dirtsurfer's Profile: http://www.unicyclist.com/profile/2352 View this thread: http://www.unicyclist.com/thread/27401 |
#10
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Brake Boss Welding
Dirtsurfer wrote: * I (using Azonic Momentum 44MM rim) for wider rims. get the 90 degree kit for the hose at the lever. * Above two things are great. I wanted those but not reached there. I'm currently using Mavic Deemax 26" rim and Alex 24" rim. I have wanted to by Azonic Momentum 24" rim because it is very wide and also have good rim braking surface. But here, they only sell as a complete wheel set which has a little bit high price tag on it. Also they have no 24" yet . I wish they make 24" and sell as a rim only. If they do, it will be a great deal for the municyclist. For 90 degree connector, I have dreamed it. Not reached there. -- doctor - WildDoc at WildUni.com Insane at 'unicycle' (http://www.wilduni.com) but not so insane at 'work' (http://www.kumc.or.kr) Dokyoung Yoon email: webdoc(at)dreamwiz(dot)com ------------------------------------------------------------------------ doctor's Profile: http://www.unicyclist.com/profile/1477 View this thread: http://www.unicyclist.com/thread/27401 |
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