[PSUBS-MAILIST] Manipulator arm

[hank pronk via Personal_Submersibles]

Scott,
You need to decide on what type of hyd system you are going with before you dive into cylinders.  If you are going with a pressure compensated system, you can use cylinders with a wiper seals on the shafts.  If you not pressure compensating, then use cylinders with o-ring seals on the shafts.  I would use o-ring sealed shafts regardless.
Hank--------------------------------------------
On Wed, 1/21/15, swaters at waters-ks.com via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Manipulator arm
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Wednesday, January 21, 2015, 8:25 AM
 
 Gotcha.
 I got about 8 different suppliers I have found so far with
 SS cylinders. I think I'll order a few to play with. I
 am also planning on using electric silionoids for
 controlling the valves.Thanks,Scott
 Waters
 
 Sent
 from my U.S. Cellular® Smartphone
 
 -------- Original message --------
 From: hank pronk via Personal_Submersibles  
 Date:01/21/2015  6:54 AM  (GMT-06:00) 
 To: Personal Submersibles General Discussion  
 Subject: Re: [PSUBS-MAILIST] Manipulator arm 
 
 
 Scott,
 Gamma uses air cylinders with hydraulic fluid and
 pump.  The hydraulic system is very standard except it
 uses air cylinders in place of hydraulic cylinders.  
 Hank--------------------------------------------
 On Tue, 1/20/15, swaters at waters-ks.com via
 Personal_Submersibles
 <personal_submersibles at psubs.org> wrote:
 
  Subject: Re: [PSUBS-MAILIST] Manipulator arm
  To: "Personal Submersibles General Discussion"
 <personal_submersibles at psubs.org>
  Received: Tuesday, January 20, 2015, 10:27 PM
  
  
  Is Gamma all air cylinders? Do you just use
  a air compressor? What happens to the air once it is in
 the
  cylinder and you want to lower the cylinder? Is it
  recompressed or somehow expelled? I really don't know
  crap about pnematics. Haha. Why do all the subs use
  hydrolics and not air. For example
  hydro-lek?Thanks,Scott
  Waters
  
  Sent
  from my U.S. Cellular® Smartphone
  
  -------- Original message --------
  From: hank pronk via Personal_Submersibles  
  Date:01/20/2015  9:06 PM  (GMT-06:00) 
  To: Personal Submersibles General Discussion  
  Subject: Re: [PSUBS-MAILIST] Manipulator arm 
  
  
  Scott,
  Not sure why you want hydraulic cylinders.  You want
  air cylinders, they are light weight and all
 aluminum. 
  If you use 2 in bore air cylinders you can run on a 500
 psi
  system.  Also air cylinders typically have 5/8 rods
 and
  that is the most important part.  The rod size is
 what
  the water pressure is pushing back against you
 system. 
  Air cylinders have a single o ring on the piston and are
  cheap and easy to replace. If you want ss rods then just
  replace the chrome rods when they wear out.  I made
 my
  own rods for Gamma, easy peezy.
  Hank--------------------------------------------
  On Tue, 1/20/15, swaters at waters-ks.com via
  Personal_Submersibles
  <personal_submersibles at psubs.org> wrote:
  
   Subject: Re: [PSUBS-MAILIST] Manipulator arm
   To: "Personal Submersibles General
 Discussion"
  <personal_submersibles at psubs.org>
   Received: Tuesday, January 20, 2015, 8:52 PM
   
   Hydrolic.
   Also what size bore does yoursub have
   Hank?Thanks,Scott Waters
   
   Sent
   from my U.S. Cellular® Smartphone
   
   -------- Original message --------
   From: hank pronk via Personal_Submersibles  
   Date:01/20/2015  7:34 PM  (GMT-06:00) 
   To: Personal Submersibles General Discussion  
   Subject: Re: [PSUBS-MAILIST] Manipulator arm 
   
   
   Are you using hydraulic cylinders or air cylinders.
   Hank--------------------------------------------
   On Tue, 1/20/15, swaters at waters-ks.com via
   Personal_Submersibles
   <personal_submersibles at psubs.org> wrote:
   
    Subject: [PSUBS-MAILIST] Manipulator arm
    To: "psubs"
   <personal_submersibles at psubs.org>
    Received: Tuesday, January 20, 2015, 7:51 PM
    
    Does
    anyone have a reccomendation on a source for
  hydrolic
    cylinders? Ofcourse there are tons online, just
  wondering
   if
    someone has a particular place they like to get
    them.Thanks,Scott Waters
    
    Sent
    from my U.S. Cellular®
    Smartphone
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