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Author Topic: 11" pin to cg -- really long pin  (Read 3236 times)

D Scott Johnson

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11" pin to cg -- really long pin
« on: May 03, 2007, 09:36:07 AM »
Ok, you drilling gurus, I'm seeking your help.  You may have answered this before but I never read it not knowing I would need to know an answer.  I got the following ball to drill up:

15 lb. Horizon Pearl
4.95 oz. top weight
11" pin

I tried laying it out six ways and weighed it up and could not get anywhere close on keeping statics close to legal.

Any suggestions are welcome but would like to have the following questions answered in particular...

1)  Is there a size and depth limit for weight holes?  finger holes?  thumb?

2)  The closest I came to legal was putting the cg on the palm line, 1" above the mid-line, but that put the pin on the back side of the ball.  Will having the pin that far away cause the ball to roll really weird?

3)  Any time the cg was placed a) below thumb, b) in thumb quadrant, or c) anywhere on the mid-line, I would end up with over 5 oz. of thumb weight in the ball.  I have a Jayhawk weight removal chart but is there any way possible to actually get rid of 4 to 5 oz. of thumb weight?

I look forward to your collective wisdom and experience and help.  Thanks.

Scott
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newman891

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Re: 11" pin to cg -- really long pin
« Reply #1 on: May 03, 2007, 05:45:38 PM »
The largest a weight hole can be by USBC standards is 3" deep and 1 1/4" in diameter.  As far as the depth of the finger or thumb holes, there is no size limit as to how deep you can go as far as I know.  Hope this helps.
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302efi

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Re: 11" pin to cg -- really long pin
« Reply #2 on: May 03, 2007, 05:49:25 PM »
I'm waiting for shelly to give the talking to about flipping the ball over...

3-2-1.....
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shelley

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Re: 11" pin to cg -- really long pin
« Reply #3 on: May 03, 2007, 06:06:55 PM »
0.

Flip it over, find the spot 180* from the pin, you now have a 2.5" anti-pin (put the pin at the south pole, the north pole is the anti-pin).  Use the anti-pin like you'd normally use the pin.

Doesn't solve the problem with 5oz of top weight but it makes laying the ball out more normal.  You'll still be limited to putting the CG in the grip center, almost any movement will make the ball illegal.  On the bright side, you can have up to 3oz of top weight in a drilled ball, so you only really have to remove 2oz, which you'll do anyway.  Probably end up with about 2-3oz of TW in the end.  You could move the CG off the grip center a little bit to give it some side weight and let you put a balance hole in later if you need to, but it'd be easier to just put the CG in the center of grip and be done with it.

I'm not even a driller and I know that much.  

SH
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Aloarjr810

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Re: 11" pin to cg -- really long pin
« Reply #4 on: May 03, 2007, 09:30:36 PM »
I agree with Shelley. I had a blem. the same way with a far out pin.
Just project it around 180* and layout as you normally would.
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renoatpikeville

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Re: 11" pin to cg -- really long pin
« Reply #5 on: May 03, 2007, 09:36:37 PM »
Do you have a picture of this ball...I would really like to see this 11" pin.
Thanks
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JohnP

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Re: 11" pin to cg -- really long pin
« Reply #6 on: May 03, 2007, 10:24:27 PM »
Confirm the cg and top weight on a dodo scale.  Odds are the cg is mismarked.  --  JohnP
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Re-Evolution

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Re: 11" pin to cg -- really long pin
« Reply #7 on: May 04, 2007, 07:58:44 AM »
By doing what you shelley suggests you just became the only person on the planet to have a Horizon Pearl with an inverted weight block. I have seen many times where a company will make a new version of a ball and the main change they made was they inverted the weight block to cause a slight cjange in ball roll so in my opinion your situation is kind of cool.
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Crankenstein300

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Re: 11" pin to cg -- really long pin
« Reply #8 on: May 04, 2007, 07:14:13 PM »
quote:
By doing what you shelley suggests you just became the only person on the planet to have a Horizon Pearl with an inverted weight block. I have seen many times where a company will make a new version of a ball and the main change they made was they inverted the weight block to cause a slight cjange in ball roll so in my opinion your situation is kind of cool.
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Funny you mention this because back in the days of the Fire Storms and Forest Fire Storms, a friend of mine got a Forest Fire with a huge pin out like that. Now besides being a solid coverstock, Storm also inverted the core in the Forest Fires. He drilled it with the pin flipped 180 degrees as described so he effectively had a rare solid Fire Storm with the core the same orientation as the pearl Fire Storm. Ball rolled great too.
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D Scott Johnson

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Re: 11" pin to cg -- really long pin
« Reply #9 on: May 08, 2007, 03:21:35 PM »
Thanks for all the suggestions and good advice.  I contacted the seller and we have worked out a replacement ball.  Scott
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