Re: Motorcycle production in the 1950s
Posted: Sat Aug 15, 2015 3:00 pm
Screwing cylinder studs inbull wrote:moto al wrote: ]
and it would be interesting to know what job is been done to the piston in that picture
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Motorcycle production in the 1950s
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Re: Motorcycle production in the 1950s
Posted: Sat Aug 15, 2015 5:18 pm
clutchspring wrote:I would say the men are brazing or welding the swinging arms together.
Ian
well, it looks like that at first glance
but, I have never seen sparks like that come from gas welding or any welding, where the sparks come out looking like solid strings of cord or rope
but then, if it is welding of some kind, the flash looks high, and their are not wearing any dark goggles or mask
I don't know
Re: Motorcycle production in the 1950s
Posted: Sat Aug 15, 2015 5:34 pm
bull wrote:moto al wrote:
it could be a lathe of some kind their using
Re: Motorcycle production in the 1950s
Posted: Sat Aug 15, 2015 7:42 pm
Slow camera shutter speed, hence long sparks.
Re: Motorcycle production in the 1950s
Posted: Sat Aug 15, 2015 8:38 pm
Boo Cock wrote:Slow camera shutter speed, hence long sparks.
well maybe,
its probably Tig welding
anyway, whats with the big chimney pipe coming out the back of the bench
Re: Motorcycle production in the 1950s
Posted: Sat Aug 15, 2015 8:43 pm
Not the piston .... he is putting he studs inbull wrote:moto al wrote: ]
and it would be interesting to know what job is been done to the piston in that picture
Re: Motorcycle production in the 1950s
Posted: Sat Aug 15, 2015 9:16 pm
Putting the barrel / cylinder head studs in by the looks of it.
Re: Motorcycle production in the 1950s
Posted: Sun Aug 16, 2015 6:56 am
Thanks Al, It is indeed one of the the Jawa factories producing the 250/350 twinport, single but with twin exhaust ports/pipes. They could be from the 60`s as it remained the same for a few decades before moving it all to India to produce Jawa Yezdi!
The pics made me search my Dads bike library because i knew Id come across this before.
Jawa 350
One of the Factories in recent years.
Pics stolen from the net but I may be able to scan some more in.
cheers Marc
The pics made me search my Dads bike library because i knew Id come across this before.
Jawa 350
- jawa07062006.jpg (74.55 KiB) Viewed 1559 times
- ab5f0a4328e70250cad5acd6fb873ba5.jpg (65.29 KiB) Viewed 1559 times
cheers Marc
Re: Motorcycle production in the 1950s
Posted: Sun Aug 16, 2015 6:59 am
That's what gave me the idea - and it was Music While You Workbull wrote:it reminds me of the old Gramophone, so it does
Our Gracie at her best? :whistle:
Regs
Simon
Re: Motorcycle production in the 1950s
Posted: Sun Aug 16, 2015 7:20 am
They're gas welding, you can see the hoses going to the torch and the pipe coming out of the bench is for fume extraction. The welders are wearing dark glasses rather than goggles or a full shield but the flash from oxy-acetylene welding wouldn't give them arc eye anyway. The sparks are probably caused by the flux they're using but I've not done any gas welding since I was an apprentice and that's a long time ago :pinch:bull wrote:Boo Cock wrote:Slow camera shutter speed, hence long sparks.
well maybe,
its probably Tig welding
anyway, whats with the big chimney pipe coming out the back of the bench