Bands for twin 40s

[WD8CDH]

Hi Fred,

The 5.25" diameter tanks are aluminum. The AL40s from Luxfer that I have are 24.6" long and weigh 15.3 lb. each. The AL30s, made by HyMark and Catalina are 19.9" long and weigh 13.6 lb. each.

The AL50 that you looked at was probably a Luxfer and is 6.9" diameter and 19" long and weighs 21.2 lb.
The AL45 that we have been talking about is also 6.9" diameter and 17.7" long and weighs 21.3 lb. if made by Catalina. HyMark also makes an AL45.

There is also a Steel 45 made by Faber and sold by OMS. The steel LP 45 (45CF filled to 2640psi) is 5.5" diameter and 23.62" long and weighs 21 lb.


The AL45s and AL50s, being 6.9" diameter are easier to find double bands and manifolds for.

There are some standard, but rare, double bands for the 5.5" diameter steel tanks.

I have never seen standard double bands for the 5.25" aluminum tanks. I have made my own bands for all of my sets. I have several sets of AL40s and several sets of AL30s.

Manifolds with narrower spacing for the skinny tanks are harder to find, but not impossible. They are fairly common in Europe. Some of my narrow manifolds are US spec modular valves with Euro crossovers, Some are US valves and US narrow crossovers and some are US valves with custom machined crossovers.

I think Peanut King will make custom bands in any spacing and tank diameter.

[Ken]

John,

Contact Vic at tech_n_rec_solutions. [email protected]

He fabricates tank bands to your specs. He made some up for me, first class work and for a price that wasn't worth my time to do it myself. His work is top shelf und I knows from what I speaks.

A few years back I wanted to set up as set of 6.9" steel 45's. I have attached some CAD stuff I did so I could send the dimensions to him. But you don't need the CAD stuff, just tell him the tank diameter and the tank spread centerline to centerline you need. He will take care of the rest.

Here are some jpg's of one of the sets he made for me.

...well I wanted to post some jpg's but for some reason the forum posting gods felt otherwise. OK, you can see what I sent (if you want to copy the dimensions) on Photobucket...
http://s583.photobucket.com/albums/ss27 ... k%20Bands/

Ken.

[John Lundy]

Hi Ken,
Thanks for the tip. I will get in touch with him.

John

[Ken]

John,

Here are links to CAD files showing the dimmensions for two light tank set-ups.

First, is a double set up with (2) Nemrod 27 cu. ft. tanks. You only need one band for this set up and you can mount the band to a standard backpack. I am putting this set together now. Dare I say, this will be a very "cute" setup.

CAD File:
http://s583.photobucket.com/albums/ss27 ... oubles.jpg

Next is a set of Wothington 40's. Two bands, set up to use an OMS SS plate and harness.

CAD File:
http://s583.photobucket.com/albums/ss27 ... oubles.jpg

Photos of this setup:
http://s583.photobucket.com/albums/ss27 ... Bar_07.jpg

I like these small tank sets. Very light and very compact. Good luck with your project.

Ken.

[John Lundy]

Ken,
Thanks for the CAD illustrations and the photo of your Worthington 40s. I'll let you know how things work out. My bands for my 50s arrived today so I have the manifold and bands and am waiting to hear from the LDS that the tanks have arrived. For these, I will use a Zeagle backplate and Tech BC and for vintage dives, the replica navy harness and my horsecollar BC. I plan a similar setup for the 40s if possible. The AL40s are 5.25 inches in diameter and longer than your Worthingtons appear to be. I really like the feel and balance, and of couarse looks, of doubles.

John

[John Lundy]

My two 50s arrived at the LDS and I am on the way over with the bands and manifold to put them together. Now I can take some measurements and order the vintage harness. My other manifold arrived as well so all I need are bands for a set of twin 40s.

John

[Ken]

I have updated my plan for the Nemrod 27 Doubles.

http://s583.photobucket.com/albums/ss27 ... bles-1.jpg

Ken.

[John Lundy]

I have updated my plan for the Nemrod 27 Doubles.

http://s583.photobucket.com/albums/ss27 ... bles-1.jpg

Ken.

Hi Ken,
Are those manifold measurements for a US Divers solid bar manifold?

Thanks,
John

[Mandyy1234567]

YOU may want to contact [email protected] They may be able to help
You with this.

Michael

[Ken]

I have updated my plan for the Nemrod 27 Doubles.

http://s583.photobucket.com/albums/ss27 ... bles-1.jpg

Ken.

Hi Ken,
Are those manifold measurements for a US Divers solid bar manifold?

Thanks,
John

Hello John,

Yes, the nominal dimension for the spread on the U. S. divers solid bar manifold is 8.25 or 210mm. The manifold I am using for my Nemrod Pony doubles set is a U. S. Divers model 0502. It has the 1/2" NPT threads and a reserve valve. This manifold also has a spread of 8.25".

I am going to have to fabricate a special length pull rod for the reserve but that's not to big a deal. I have already sent the drawings to Vic at Technical Soultions and I should have the new bands by the end of January. I will post some photos when I have this kit finished.

Ken.

CAD Drawing:


CAD Render:

[John Lundy]

Michael,
Thanks for the information. I will check it out.

Ken,
Thanks for confirming the distance between stem centers. I received an email from Vic and will get a quote after the first of the year.

John

[John Lundy]

Ken,
Just to let you know I have contacted Vic and arranged for him to make a set of bands for a set of twin 30s/40s. Both are 5.25 inches in diameter so I could use either. Thanks again for the lead.

John

[John Lundy]

Received word from Vic that my bands for the twin 30/40s should be arriving Monday or Tuesday. I will take some pictures.

John

[JES]

Received word from Vic that my bands for the twin 30/40s should be arriving Monday or Tuesday. I will take some pictures.

John

Congrats and we're looking forward to the pictures.

[Ken]

Received word from Vic that my bands for the twin 30/40s should be arriving Monday or Tuesday.

Hello John,

That's good news. I have also received word from Victor that the bands I ordered for the set of Nemrod doubles I'm putting together should arrive next week. All of the work he has done for me in the past has been first rate. I am looking forward to finally getting this project done. I'll post some photos as this set of doubles will be pretty unique. Small, light and very compact.

Regards,

Ken.