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2.35 on caustic and getting fat on your ass eating biscuits and then having to repaint the bottom part of the frame to complete a half baked job, surely bicycle restoration would require a mechanical approach as you initially tried to attempt but failed. I am unable to give my customers this kind of service as they would lynch me for wrecking there frame. I employ the caustic treatment for unseizing parts on tractors and other farm machinery parts, its also good for stripping paint off doors. Rethreading is not part of the process but cleaning it with a thread tap is. The three counties are, nocausticshire, nopaintshire and imethebolloxshire. BB brackets should be checked for seizing on the threads every year and it is agood idea to keep this area clean, as afterall it is in the direct line of road filth. They should also be fitted with copperslip on the thread
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I cant guess how many bottom brackets ive removed in the past for bike shops in the three counties, hundreds, and i make good money at it. There is no need to use caustic or penetrating oil and it only takes about half an hour if it is brutally seized. All one needs to have is the right tools. The removal tools that one buys from cycle shops are only any good for moderatly seized brackets and they seem to be designed to strip all of the teeth out when any overload is exerted on them. One problem with bottom bracket design is that the teeth are never deep enough. After i remove an old bb i also clean out the threads with a thread tap(left and right). Anyone out there want to challenge me? ime up for it.
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I have read some of the posts on this subject and cunt quite get the jist of whats goin on as i am a townie. when i buy a bike from the scrap yard th tax man dosnt get involved in what i ride. I am a businesss owner and dont declair any cycling expenses even thogh i get the full benefit of the fitness that comes with cycling. What is all this bxxxxks about. Please fill me in as i am only a townie
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Mr Van Uden, i used to race for the classic motorcycle racing club, and one day at snetterton race circuit a bycycle race was held at the end of the racing day, a crate of beer was up for grabs and i was going to win it on our pit bike which happened to be a grocery bike. Up against all sorts of raceing bicycles, as most of the racers had a news letter the month before telling them of the event, we somhow didnt recieve ours. Anyway the beer seemed to be so enticing after a hard days racing, that i won the race and the crate that we duly got pissed on, oh what a night.
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I have done time trialling and done 650 plus miles a week training on the road and been to austria on many occasions cycling up the alpen roads for the past 35 years and never suffered from pins an needles in my hands until i went out a couple of weeks ago with my son on our mountain bikes,"ouch" pins and needles in my hands,. I went to the docs and he gave me a working ECG, nothing wrong, the only thing i can put my problem down to is, i will have to discover a different riding style because i am getting older, 47, i am trying everything to get rid of those damn irritating p and ns. By the way are you a smoker like me?
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I have in the past repaired many vintage and veteran bikes and the only way to succesfully repair an alluminium thread is to build it up employing the tig welding process and then remachine the thread to standard. If one tries to weld aluminium to steel it will not sucessfully produce any type of good weld. The steel has a higher temperature of melting point and the ali has a lot lower, the steel has carbon in it and the ali dose not, hence a crummy weld with no strength. This is what 30 years of welding has tought me
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years ago i restored my fathers rory o brien and had it rechromed to standard as it was done in the 1950s. I knew that some of the plating chemicals were corosive and put great emphasis on the decontamination of the inside of the frame tubes. Thirty years later the cross tube crumpled at a set of traffic lights as did one of the fork blades. Being a mechanical engineer and a metalurgist gave me the insight to deduce that all those years ago, the caustic dip used in the plating process was not neutralised and this was causing constant decay of the tubes over all that time. The bike was used over this time for time trialling and 650 or so miles a week for training. The little bump or knock that is in a frame is nothing to worry about and can be filled with any proprietry filler and then painted over or can be brazed over and then dressed in.
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any joy on payment