[PSUBS-MAILIST] machining q ball

[hank pronk via Personal_Submersibles]

Hi James,
I will be happy to post pics of the q ball arm.  
Hank--------------------------------------------
On Mon, 10/20/14, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] machining q ball
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Monday, October 20, 2014, 9:45 AM
 
 Hi
 Hank,
 Im very interested to see
 how your manipulator works out.  Im sure others will be
 too.  Can you take some pics as you go along, so we can see
 how its coming along. Kind Regards
 James  
 On 18 October 2014 21:35,
 Jim Rudholm via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 You're welcome, glad it worked out
 ok...JimR
 On Sat, Oct 18, 2014 at
 11:25 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
 
 Hi Jim R
 
 I just machined another q ball and it worked perfect with
 your tricks.
 
 thanks'
 
 Hank--------------------------------------------
 
 On Fri, 10/17/14, Jim Rudholm via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
 
 
  Subject: Re: [PSUBS-MAILIST] machining q ball
 
  To: "Personal Submersibles General
 Discussion" <personal_submersibles at psubs.org>
 
  Received: Friday, October 17, 2014, 6:15 PM
 
 
 
  I use
 
  billard balls for handles on my lathe fixtures. Try a
 PVC
 
  water pipe cap mounted in the 3-jaw and machine the
 inside
 
  for a snug fit. Then tighten a little more. Also add
 coolant
 
  and dress down the drill's cutting edges with a
 hand
 
  diamond hone to a very narrow flat. This gives more of
 a
 
  scraping action, works for brass and bronze, too. For
 
  handles, its a blind hole for a 1/2-13
 
  thread.JimR
 
  On Fri, Oct 17, 2014 at
 
  3:00 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 
  wrote:
 
  Thanks
 
  guys
 
 
 
  Emile,
 
 
 
  I think the hard resin q ball is what Gamma had when it
 was
 
  built.
 
 
 
  Vance,
 
 
 
  That is great, I am thinking the q ball twisted in the
 jaws
 
  causing the drill to bind.  I can make a fixture to
 hold
 
  the ball tight without damaging it, while it is in the
 
  lathe.
 
 
 
  Hank
 
 
 
  --------------------------------------------
 
 
 
  On Fri, 10/17/14, via Personal_Submersibles <personal_submersibles at psubs.org>
 
  wrote:
 
 
 
 
 
 
 
   Subject: Re: [PSUBS-MAILIST] machining q ball
 
 
 
   To: personal_submersibles at psubs.org
 
 
 
   Received: Friday, October 17, 2014, 5:44 PM
 
 
 
 
 
 
 
   Hank,
 
 
 
   I've sent along some questions to the
 
 
 
   horse's mouth. Haven't heard from him in
 months,
 
  but
 
 
 
   I'm hoping he will get back to us shortly.
 
 
 
 
 
 
 
   Vance
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   -----Original
 
 
 
   Message-----
 
 
 
 
 
 
 
   From: hank pronk via Personal_Submersibles
 
 
 
   <personal_submersibles at psubs.org>
 
 
 
 
 
 
 
   To: personal_submersibles
 
 
 
   <personal_submersibles at psubs.org>
 
 
 
 
 
 
 
   Sent: Fri, Oct 17, 2014 4:37 pm
 
 
 
 
 
 
 
   Subject: [PSUBS-MAILIST] machining q ball
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   help!
 
 
 
   I tried to machine a q ball today as an experiment
 
  before
 
 
 
   the proper one
 
 
 
   arrives.  I put tape around it and put it in a 3 jaw
 
  chuck
 
 
 
   and while drilling
 
 
 
   the hole through it cracked.  Do I need to make a
 fixture
 
  to
 
 
 
   hold the q ball
 
 
 
   steady maybe?  I made a home made o-ring groove
 cutter
 
  and
 
 
 
   that worked perfect.
 
 
 
   The q ball is very brittle, but machines very nice. 
 
  Any
 
 
 
   ideas would be
 
 
 
   appreciated.
 
 
 
   Hank
 
 
 
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