[PSUBS-MAILIST] machining q ball

[Jim Rudholm via Personal_Submersibles]

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
>
>
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>
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>
>
>   -----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
>
>
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>
>   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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