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Chopping an old Jap bike frame
Posted: Sun May 11, 2014 8:53 pm
by rake
Hey guys, been doing a frame for a friend and found that the old tubing
doesn't like 70S-2 0r 70S-6 filler wire all that much. The new 1020 DOM
is fine but the old stuff is like snap, crackle and pop!
But good ole 309 stainless is just fine.
Re: Chopping an old Jap bike frame
Posted: Sun May 11, 2014 9:06 pm
by GreinTime
I was just going to say that man, my dad had to use 309 to clean up porosity on the previous owners hard talk conversion on my brothers xs650!
--Sam
Re: Chopping an old Jap bike frame
Posted: Sun May 11, 2014 10:15 pm
by Antorcha
Fillet braze.
Re: Chopping an old Jap bike frame
Posted: Mon May 12, 2014 7:14 am
by rake
Antorcha wrote:Fillet braze.
Huh?
Re: Chopping an old Jap bike frame
Posted: Mon May 12, 2014 2:38 pm
by noddybrian
I think he means " old school " - oxy / acetylene conventional brazing like they always used to build bike frames by hand - before Japanese robots learned to weld ! it gives good results in terms of looks / strength & spreading the load over a good area of tube so it's less likely to fatigue crack - often the old ways are still best !