tryabean
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Posts posted by tryabean
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hey all absolutly destroyed my rear thread the other day so i got the magura bolt got out me thread gauge and found that my bolt is 0.8 but i canot find a helicoil at the size of m4x0.8 any one know where i can get one?
any help will be appreciated
ps iv asked at work and the lads are on the look
but still any help
michael x
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awsome stuff i see ur riding the ol adament you get that from jason? and you had a sweet setup on that zoo haha
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ill try and make it
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Looks lush mate, finaly back then eh
how did you get a middleburn bash on tensiles ? Drill it out ?
to be hohnest mate i duno i didnt do it but it looks drilled and heavily modifyed in that area so im guessing yeah haha but there proper on and safe witch is cool
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hey all decided to show my bike off haha finally got a new bike after a year out of trials
but now finally got one got it yesterday and oohh its stunning in my opinion anyway spec goes
zoo pitbull 06
bt forks
pro 2 echo o7
tryall rim on tryall disk hub
pazzaz stem
onza carbon bars
avid disk
tensile cranks with middleburn bash
red gu headset
and just general lovlyness
and my car in back ground
lol comment away
michael
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May called. They want their thread back!
Belated welcome to TF.
yes yes haha i understand that it was a long time ago
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flipin hell hey coll lol
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ooh allen key set ratchet and socket set and spanner set all metric
brake cleaner and spare rag and spare pads and food cos im a diabetic cant forget that stuff -
lol! hey and welcome
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wow! im spechless that was awsome haha
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the reason why i bring this topic up is that i started my apprentice work at a fabrication place local to me and iv been with a bloke who welds ally. and i brought it up and thats what he told me hes made a few mountain bikes himself like but i dont wana cause argument haha!
Rate of cooling affects the grain size in a material. If you cool something suddenly it forms small grains, making the material brittle. If you cool it slowly it has time to form larger grains, making it more ductile. It's more favourable for bike frames to aim for the more ductile side of this range. Particular medals are chosen with compositions to improve hardenability or ductility depending on the final application and the heat treatment available. Welding tends to heat and cool the material very quickly (Especially in Al which is about 10 times as thermally conductive as steel IIRC).Heat treatments such as T6 are more involved again. They require the material to have a composition that allows certain compounds to form in the material at temperatures below phase transition temperatures (Where the material either turns from a solid to a liquid or from a solid with one crystalline structure to another structure). This is also known as aging as in many materials, especially aluminium, this process continues to happen very slowly at room temperature...
To sum up regarding bike frame materials - some steels and aluminiums can be welded without requiring heat treatment (Either they're designed to handle welding without losing too much strength or they're built much heavier than they'd need to be to give the same strength/life if they were heat treated). Pretty much all aluminiums suffer a massive drop in either strength of fatigue resistance if they're not heat treated. This is why if you break an aluminium frame and get it welded up, the chances are it'll fail just beside the new weld (In the heat affected zone where the material is most brittle) if it's not heat treated.
thats a really good explanation
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I didn't mean the grade would be different or anything, I meant that the metal immediately surrounding the weld (Which you can see way better on welded steel frames) would get super, super hot, and that would change how brittle/hard/something it was compared to the areas further down the tube which didn't get particularly hot?
if you let it cool and dont use a major f in high amperage there will be no need to heat treat on other hand you could quench it if need so for extra strength
i wana say at this point i didnt say heat treating dont work im jus saying the reason why there is no need i just thaught id clear before some one says heat treating does work haha
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I thought the deal was was that after welding, the metal near the joint would heat up, causing it to be a different hardness or strength to the rest of the material, and so by heat treating you balanced it out?
noo because when you weld alluminum you match the grade of ally to the same rod or atleast should do so its all the same strength even if it aint the same grade it will still be strong and 100% reliable aslong as the weldor did a good job
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heya
i have noticed quite allot of people asking about heat treating frames after being welded, but i want to explain why you dont need to heat treat alluminum. heat treating is a process that makes carbon rise to the surface of a metal to harden it and strengthen it. the reason why there is no reason to do this to alluminum is that it dosnt have carbon in unless its a wacky kinda alloy but still you would only heat treat high carbon steel or gun metal wich is basically high carbon steel haha
just thaught i would share that and i hope i have helped people
michael x
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oh my god.... i cant belive it
he was a luvly fella aswell r.i.p mate
xx
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erm...everyone is different but i gueess it wouldnt cost much just for a butt weld over a crack but iff u wanted a plate over it i guess it would be slightly more ask a alluminum fabricator if there is 1 near bye
michael
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a ?
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thats really cool
i made a toolbox with acrylic box and perspex opening with gas struts lid i got a b for my work i think i made a mini skatebord but then got told off i would show every one but the teacher threw it away lol
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Do you think, if you went around a few churchs/abbeys in the area, taking photgraphs of the altars/arches and entrances you'd get anything showing up?
noppe i tried it with some mates although i took somne vids once and heard some voice but its probsd a load of poop!
and id love to go on that camp ur onabout i love scary stuff
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count me in too
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lol never new it was gona cause so much fuss no effort was put in haha but i just thaught you know post up see what people say yeah theres so much more i can do with it i can engrave ect ect and make mutiple bollox to make it look cool but its jus a bit of fun really
on that note if i made a table out of a old bmx would sum 1 be intrested lol cos i think i may just do that
michael
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So why exactly did you need a welder to make that?
Looks pretty good, though thats not the prettiest rotor around.
were the bolt hles are i tack welded them
and i know it aint pretty it aint supposed to be cos its also craked lol thats why i made this out of it
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wait a minute! you sold a trials bike for a mig setup and made that
looks cool but not that difficult lolmate i didnt sell my bike jus to make that lol i make steel gates and statues ect not lil farty stands lol i jus made this for fun
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hey all as some of you know i sld my trials bike a while ago now to get mig setup and now i hgave i was messing around and made this
i personally thaught it was cool
let me know what you think michael
Helicoil M4x0.8?
in Trials Chat
Posted
ahh yes indeed
damn! my tape aint accurate it mesured 4
thanks that might help my quest now haha!