[PSUBS-MAILIST] cue ball arm

[Alan via Personal_Submersibles]

Hi Hank,
I got the kiddy size pool ball wrong anyway.
Good that it won't come right through if it colapses.
Alan


Sent from my iPad

> On 30/11/2014, at 8:53 am, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Alan,
> The name cue ball arm is misleading a bit.  The arm uses a snooker ball regulation size 2 1/8 +- .oo5 in.  I see no need to improve the outer seat, it has only one purpose, that is to keep the ball in place.  The ball cracked when I drilled it because I was not experienced in machining this material.  I have since machined a perfect hole with o-ring groove.  The trick is to increase the drill size very gradually until a cutter fits in the hole.  If it cracked while in plase it would be pushed together tight by the shape of the seat.
> Hank--------------------------------------------
> On Sat, 11/29/14, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Subject: Re: [PSUBS-MAILIST] cue ball arm
> To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
> Received: Saturday, November 29, 2014, 2:29 PM
> 
> Looks like
> you have a lot of angle there Hank.Maybe you
> could use a spare pool ball & abrasive paste to get a
> perfect seat for it?You said
> that one pool ball cracked while drilling. I hope
> the pool ball can't push through if it breaks
> up.The size
> pool ball you are using is a children's
> size. 
> I wonder
> if you went to an adult size ball whether it would
> be constructed of a better material?Alan
> 
>    From: hank pronk via
> Personal_Submersibles
> <personal_submersibles at psubs.org>
> 
> To:
> personal_submersibles at psubs.org 
>  Sent: Sunday, November
> 30, 2014 7:51 AM
>  Subject:
> [PSUBS-MAILIST] cue ball arm
> 
> 
> Alan,
> Have a look at my cue
> ball arm assembly at Gamma restoration.  I repaired the
> original seat for the cue ball.  After Hugh said to forget
> about making a curved seat, I realized I could make my own
> seat on a 45 degree angle.  I made the second half of the
> assembly with a home made plastic seat machined from ABS. 
> I installed it in Gamma and it turns smooth as glass and has
> the original amount of range.  With home made plastic
> seats, it is a breeze to make this because the o-ring still
> does the sealing.  
> Now I just need the
> plans and my new cue ball to finish the arm.  
> Vance, 
> I was thinking about
> mounting an air cylinder horizontal inside the sub to pull
> on the block and tackle cable.  The deeper I go the more
> air pressure I add, it will be like an adjustable spring.
> Hank
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> 
> 
> 
> 
> -----Inline Attachment Follows-----
> 
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> 
> 
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles