http://www.putfile.com/album/184492

Got impatient and ordered a ball from the internet because the local distributor was out.  They sent this and say it is 1st quality, so they won't take it back.  I say it's a pro CG and limits my drilling option.  I can't do a 5X3 because of the Mass Bias placement.  I think this is one of the balls that were mislabled from the factory.  

What do you think?  Pro CG or 1st Quality?

http://www.putfile.com/pic/7956858

http://www.putfile.com/pic/7956859

better pics.



Edited on 4/8/2008 4:28 PM

First quality. It doesn't look like it's out more than 1 1/2".
As a righty, this ball will be OK for your use. You can still use the 5x3 layout, since you are referencing the PAP and the MB, and not the shifted CG, when laying out the ball. Actually, with the CG shifted left, you may not even need a weight hole to make the ball statically legal.
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Dan
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Engineering * Bowling = a fun and practical application of rotational kinematics.

Bowling Nerd Herd (TM) Member

What's the Top Weight?

You might be able to pull this off with the right TW.
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The task ahead of us is never as great as the power behind us.

Me

MTIXE

Charter member of the Cartel for Eradication of Avenging Unicorns

Why is this a Pro-CG ball?!

Most manufacturer's allow for the CG to be out of line by up to 1" or 1-1/2". If the MB is in the lower rght portion of the picture, then the CG is left of the line through the pin/MB. For a righty, he should still be able to do 5x3 with the desired reaction, and no x-hole needed.
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Dan
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Engineering * Bowling = a fun and practical application of rotational kinematics.

Bowling Nerd Herd (TM) Member

Depending on the TW, you can punch this ball with the Cg near the palm, placing the pin and mass bias in a stacked position.  A fourth hole, located just about anywhere depending on a desired reaction shape, can be placed after the ball has the fingers punched out.  Check for static balances after she's punched out before drilling a fourth hole and make your determination of hole placement and size accordingly.
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The task ahead of us is never as great as the power behind us.

Me

MTIXE

Charter member of the Cartel for Eradication of Avenging Unicorns

Dan look at the pic again, it is almost 90 degrees from the pin cg line, way more than 1.5" off center more like 5".  

No way can I lay out the ball 5X3 with a 2" buffer, it would put the cg more than 1.5" off the midline and in the negative side.  Sorry can't take out negative side weight unless you want the ball to track over the weight hole? Top is 2.6, I tried to lay it out and it's not going to work.  

I know how to layout a ball and drill, don't need any help there just asking if it is a Pro CG or Not?  

I have contacted Roger from Rotogrip, hope he can help me.  

Thanks

hitsomeballs

With the CG off line, it just makes some drillings much more difficult or impossible because of statics, yes CG for the most part does not matter.

Because of the predictible nature of the cell, I'm looking at putting a length drilling on it 5X3, 2' pin buffer, it should finish better on the back end and still be predictable at the break point.  Basically a carry down ball, ie when the heads are hooking and when you go inside the ball won't finish.  

That is the one layout that I do not have right now and the condition that has my number, thats the reason for looking at the 5x3 drilling.

Edited on 4/8/2008 4:29 PM