Material manufacturers have there own tolerances, ive had some materials be so far out its ridiculous. The worst case ive had is 162mm pipe being 10mm out an the axis so basically i had 152mm oval tube and when you start having to do pipe to pipe joins you need to know what your working with is perfectly circle otherwise you have gaps when you go to butt it up.
What i meant by low amps doesnt make any difference was the UV produced by any form of arc welding is so intense it will burn you, yes it happens alot quicker using flux core then tig but tig will still burn the shit out of you if your not careful. My case it burn me through the hole in the cuff of my shirt. You wouldnt tig weld with goggles instead of a welding mask would you? so why treat your arms any differently.
The frame will always come out straight because hes using a creep resistant steel. Basically this means heat has no effect on the metal, it wont distort or the like. That is why chromoly is used to build steel bikes, not because its strong and light (its only strong and light because its thin walled, any steel will be strong and light if you get it to the right thickness). If you tried building a mild steel bike, no matter how good the jig is or how careful you are welding itss not going to be the same as when you assembled it.
What i meant by low amps doesnt make any difference was the UV produced by any form of arc welding is so intense it will burn you, yes it happens alot quicker using flux core then tig but tig will still burn the shit out of you if your not careful. My case it burn me through the hole in the cuff of my shirt. You wouldnt tig weld with goggles instead of a welding mask would you? so why treat your arms any differently.
The frame will always come out straight because hes using a creep resistant steel. Basically this means heat has no effect on the metal, it wont distort or the like. That is why chromoly is used to build steel bikes, not because its strong and light (its only strong and light because its thin walled, any steel will be strong and light if you get it to the right thickness). If you tried building a mild steel bike, no matter how good the jig is or how careful you are welding itss not going to be the same as when you assembled it.
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