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Author Topic: What is Pro CG?  (Read 3158 times)

dR3w

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What is Pro CG?
« on: July 12, 2005, 03:33:38 AM »
I have seen ball advertised on BowlingBall.com as Pro CG.  It says something about having atypical specs, for specific drillings.  Can anyone elaborate on what that means specifically?

Thanks,

Drew
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shelley

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Re: What is Pro CG?
« Reply #1 on: July 12, 2005, 11:36:29 AM »
Usually very long pin lengths.  5+ inches is usually considered "pro".  In reality, it's a blem.  Some companies sell blems or seconds under a different label (Columbia's Bonanza label), others call them "pro".  Really just a way of recouping what would otherwise be a loss on a ball that didn't meet the quality control specifications.

SH
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dR3w

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Re: What is Pro CG?
« Reply #2 on: July 12, 2005, 11:49:57 AM »
Thank you.
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EboHammer4ever

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Re: What is Pro CG?
« Reply #3 on: July 12, 2005, 11:57:16 AM »
Storm said if you draw a line from the pin to the RAD and the CG marking falls around 2 to 2 1/2" to the right or left of this line, then that is what they call a "Pro CG" ball.  A "Pro Pin" has a pin of more than 5" usually making the RAD and the CG fall very close to each other making the very unusual drilling but making the ball very dynamic.
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Doug Sterner

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Re: What is Pro CG?
« Reply #4 on: July 12, 2005, 12:12:19 PM »
Storm is taking what used to be labelled as spec blems and now calling them pro pin and pro cg balls.

A pro pin is a ball with a pin length greater than 5" but the cg, mass bias, pin are in reasonable alignment. I have an X Factor Friction here that has the cg and mass bias almost right on top of one another. Tricky drill...

A pro cg ball has the cg kicked way out ouf alignment from the pin and mass bias.

One must be very careful when buyiong pro cg balls because they severely limit drill patterns. This is especially true if you are a left hander.

I drilled a Vertigo for a guy (stroker, 5-1/4 right, 1/2" up PAP). The pin was at 2:00 to the ring finger, the mass bias in the strong position and the cg ended up 1/2" south of his PAP. Good thing the ball only had 2 oz of top weight to start with or there was no possible way I could have legalized it. As it was it took a 1-1/8 hole 2-3/4" deep to bring it back to 1/2 positive.

Just use your heads guys and be careful when buying stuff like this...
--------------------
Doug Sterner
Doug's Pro Shop
Owego, NY
http://dougsproshop@aol.com
www.dougsproshop.net
Although a small elite group, the bond among fellows can never be broken...FOS members rejoice!
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Doug Sterner
Doug's Pro Shop
Owego, NY

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Fighting to uphold the Constitution of the U.S.

Doug Sterner

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Re: What is Pro CG?
« Reply #5 on: July 12, 2005, 02:28:18 PM »
I had a similar experience Bob...but with a Trauma ER. With the Pin and CG stacked at 4-1/4 off my PAP the MC3 was on my VAL. The ball rolled smooth to the pocket and never did flip...just a long smooth arc.
--------------------
Doug Sterner
Doug's Pro Shop
Owego, NY
http://dougsproshop@aol.com
www.dougsproshop.net
Although a small elite group, the bond among fellows can never be broken...FOS members rejoice!
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Doug Sterner
Doug's Pro Shop
Owego, NY

Proud Member of the NRA
Fighting to uphold the Constitution of the U.S.

dR3w

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Re: What is Pro CG?
« Reply #6 on: July 12, 2005, 02:36:38 PM »
Thanks everyone.  That clarifies some things for me.  

I drilled a Vertigo for a friend (I don't drill much).  The CG was about 1.5" to the right, from the line drawn between the pin and the MB.  That was the first time I saw that.  The CG wound up about 2" from grip center, and 2" above midline after drilling.  I was able to get it legal, but at Nationals they questioned it ... not because of the weight, but because when they put it on the scale, there was a gap.  The ball wasn't round.  I thought the slight deformity may have caused what appeared like a strange CG position to the unexperienced driller (myself)
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