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Old 03-15-2013, 05:14 AM   #181 (permalink)
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I hated metal work at school 42yrs ago loved woodwork but the dockyard I got my apprenticeship at only had 2 openings for ships carpenters so I ended up doing an engine fitters trade (ships engines Monster size ones ) but trade got turned into fitter/turner and ended up in the machine shop, it had 300 lathes various types, 50 milling machines and a heavy machine shop 100' lathe, giant planer, vertical lathes etc
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Old 03-15-2013, 09:16 AM   #182 (permalink)
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100' lathe?!

daayyyyuuummmm
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Old 03-16-2013, 03:05 AM   #183 (permalink)
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we have a few of those. i believe they are 8 foot swing. the objects on them are generally rotated for 8hrs to stabilize before a cut is made. a several hour cut at that. cool machines for sure.
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Old 03-16-2013, 12:29 PM   #184 (permalink)
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I actually took some video on my phone of one of our older laser cutters cutting on some .25 steel.

I am going to host it on my photobucket and post it shortly.... really a neat thing to watch. Two parts cut in under 30 seconds.
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Old 03-16-2013, 05:23 PM   #185 (permalink)
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Old 03-16-2013, 05:28 PM   #186 (permalink)
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I'll be 'that guy' and let you know your tail stock is backwards.

Looks fun though.
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Old 03-16-2013, 05:41 PM   #187 (permalink)
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Don't worry I know . Not on at the moment. I think I have a turret changer to replace it!
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Old 03-17-2013, 02:18 AM   #188 (permalink)
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100' lathe?!

daayyyyuuummmm
They were the new ones they brought to make 2 nuclear sub prop shafts
2ft dia and 80 feet long. 9 months work 24/7 at a cost of 2 million pounds each. If the dockyard made them not an outside contractor the navy would save 4 million pounds and the was back in the 80's.
They were to be made from drop forged stainless steel and they were not very round to start off, They thing was to get under that hard skin in the first cut or you could say goodbye to any tool life so they used a very high temperature gas torch to heat the metal in front of the tool to red hot then start turning. It was like fireworks all night long as they would only do this on the night shift less chance of anyone getting burnt.
The old 80 footer used to cut a 0.005 taper every foot so the operator who had been operating the lathe for 20 yrs used to sit on the cross slide and adjust as it went along and he would cut the bearing surface which was about 3 feet long parallel to 0.0002"
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Old 03-17-2013, 02:22 AM   #189 (permalink)
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Quote:
Originally Posted by acidcustom View Post
They were the new ones they brought to make 2 nuclear sub prop shafts
2ft dia and 80 feet long. 9 months work 24/7 at a cost of 2 million pounds each. If the dockyard made them not an outside contractor the navy would save 4 million pounds and the was back in the 80's.
They were to be made from drop forged stainless steel and they were not very round to start off, They thing was to get under that hard skin in the first cut or you could say goodbye to any tool life so they used a very high temperature gas torch to heat the metal in front of the tool to red hot then start turning. It was like fireworks all night long as they would only do this on the night shift less chance of anyone getting burnt.
The old 80 footer used to cut a 0.005 taper every foot so the operator who had been operating the lathe for 20 yrs used to sit on the cross slide and adjust as it went along and he would cut the bearing surface which was about 3 feet long parallel to 0.0002"

wow. straight up. wow. intense.
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Old 03-17-2013, 02:25 AM   #190 (permalink)
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Quote:
Originally Posted by acidcustom View Post
They were the new ones they brought to make 2 nuclear sub prop shafts
2ft dia and 80 feet long. 9 months work 24/7 at a cost of 2 million pounds each. If the dockyard made them not an outside contractor the navy would save 4 million pounds and the was back in the 80's.
They were to be made from drop forged stainless steel and they were not very round to start off, They thing was to get under that hard skin in the first cut or you could say goodbye to any tool life so they used a very high temperature gas torch to heat the metal in front of the tool to red hot then start turning. It was like fireworks all night long as they would only do this on the night shift less chance of anyone getting burnt.
The old 80 footer used to cut a 0.005 taper every foot so the operator who had been operating the lathe for 20 yrs used to sit on the cross slide and adjust as it went along and he would cut the bearing surface which was about 3 feet long parallel to 0.0002"
No stress or pressure there. Dang...
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New advertising tagline: "Simon Stevens said that will be totally fine and nothing bad could ever happen. Ever."
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