[PSUBS-MAILIST] machining q ball

[hank pronk via Personal_Submersibles]

Jim,
Brilliant, I will do exactly what you said.  
Thank you
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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