Spheres

cool_hardware52 · 18th January 2008, 22:57

Quote: (Originally Posted by Dave Sutton)

Nice to have something newer than a 1944 South Bend Model C lathe and a manual Bridgeport!

Dave

A clever man with a mill and an engine lathe can do ~95% of what needs doing.

Tobin

**Dave Sutton** · 18th January 2008, 23:09

Quote: (Originally Posted by cool_hardware52)

A clever man with a mill and an engine lathe can do ~95% of what needs doing.

Tobin

Or a file and *lots* of time....

Way back when I came home from Antarctica, I apprenticed as a gunsmith for a year. The first day I got there, old Master Gunsmith gave me a lump of metal, a micrometer, a straight edge, and a circle-drawing compass, pointed to a vise and told me to come back to him when the block of metal was square and an inch on each side. The first step was to make a square... using the compass and some basic geometry to draw a square and then to file a square out of scrap steel. Tools then made, it was down to 'file and fit'. It toook two weeks. Bottom line: I learned to make tools, use tools, and have a funny looking cube of metal on my desk...

With a forge and steel you can make a file... with a file you can make the world.

(But CNC?.... Yeah Baby!!)

Dave

WD8CDH · 6th March 2008, 17:03

Quote: (Originally Posted by Dave Sutton)

5/8-18 for the thread. Diameter is about.... oh, make it 9 inches? Measurement later.

Dave

Hi Dave,

Any chance to verify the diameter yet? Or height from bottom of the tank to the center of the air outlet?

One other possability of sphere replacement would be 2, 3 or 4 very skinny tanks crosswize.

Thanks

Sandy · 23rd May 2008, 18:13

Did anyone see the Biopak 240 on ebay this week with a pair of spheres in it? I sent the guy a message asking for more info and he didn't respond with much except a vague comment of what he thougt the rated pressure of them was. I'm not sure but they looked small to be tavco sphere's and he advertised that one has a oxygen valve on it. I'm gussing the medical pin index type. Anyone else have any idea what he was using?
Sand

koputai · 24th May 2008, 12:24

Those spheres were definitely smaller than regular inconel or CCR1000 steel spheres. They looked to be around 6 inch, maybe even 5 inch diameter, and were only 160 bar fill pressure. My guess is they were old aero/astro spheres, or even accumulators from air-blast switches from an electrical switchyard.
I worked in power stations and switchyards back in the '80's and saw heaps of steel spheres from tiny like that, to 24 inch diameter.

Cheers,
Jason.

18th January 2008, 22:57	#111 (permalink)
cool_hardware52 RebreatherWorld Sponsor Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: Mar 2005 Location: SoCal USA Posts: 358	Re: Spheres Quote: (Originally Posted by Dave Sutton) Nice to have something newer than a 1944 South Bend Model C lathe and a manual Bridgeport! Dave A clever man with a mill and an engine lathe can do ~95% of what needs doing. Tobin __________________ www.deepseasupply.com
(Online)

18th January 2008, 23:09	#112 (permalink)
Dave Sutton Living on Animal Farm Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Classic Kiss rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,464	Re: Spheres Quote: (Originally Posted by cool_hardware52) A clever man with a mill and an engine lathe can do ~95% of what needs doing. Tobin Or a file and lots of time.... Way back when I came home from Antarctica, I apprenticed as a gunsmith for a year. The first day I got there, old Master Gunsmith gave me a lump of metal, a micrometer, a straight edge, and a circle-drawing compass, pointed to a vise and told me to come back to him when the block of metal was square and an inch on each side. The first step was to make a square... using the compass and some basic geometry to draw a square and then to file a square out of scrap steel. Tools then made, it was down to 'file and fit'. It toook two weeks. Bottom line: I learned to make tools, use tools, and have a funny looking cube of metal on my desk... With a forge and steel you can make a file... with a file you can make the world. (But CNC?.... Yeah Baby!!) Dave __________________ . "All animals are equal, but some animals are more equal than others" Professional Small Boy: Never Successfully Cubicled. Last edited by Dave Sutton : 18th January 2008 at 23:14.
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6th March 2008, 17:03	#113 (permalink)
WD8CDH New Member Current Rebreather/s: MK 15.X Other CCR Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Other SCR Home Build Join Date: Dec 2007 Location: NY Posts: 52	Re: Spheres Quote: (Originally Posted by Dave Sutton) 5/8-18 for the thread. Diameter is about.... oh, make it 9 inches? Measurement later. Dave Hi Dave, Any chance to verify the diameter yet? Or height from bottom of the tank to the center of the air outlet? One other possability of sphere replacement would be 2, 3 or 4 very skinny tanks crosswize. Thanks Last edited by WD8CDH : 6th March 2008 at 17:57.
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23rd May 2008, 18:13	#114 (permalink)
Sandy New Member Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Aug 2006 Location: London Posts: 26	Re: Spheres Did anyone see the Biopak 240 on ebay this week with a pair of spheres in it? I sent the guy a message asking for more info and he didn't respond with much except a vague comment of what he thougt the rated pressure of them was. I'm not sure but they looked small to be tavco sphere's and he advertised that one has a oxygen valve on it. I'm gussing the medical pin index type. Anyone else have any idea what he was using? Sand
(Offline)

24th May 2008, 12:24	#115 (permalink)
koputai Subsea Systems Current Rebreather/s: MK 15.X Other CCR Other SCR Other Rebreather/s: Not Bought Yet Other CCR Other SCR Join Date: Jul 2005 Location: Sydney, Australia Posts: 300	Re: Spheres Those spheres were definitely smaller than regular inconel or CCR1000 steel spheres. They looked to be around 6 inch, maybe even 5 inch diameter, and were only 160 bar fill pressure. My guess is they were old aero/astro spheres, or even accumulators from air-blast switches from an electrical switchyard. I worked in power stations and switchyards back in the '80's and saw heaps of steel spheres from tiny like that, to 24 inch diameter. Cheers, Jason.
(Offline)

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