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Author Topic: pin placement  (Read 1722 times)

Troyboy

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pin placement
« on: January 24, 2006, 06:29:10 AM »
Ok I'm sure this has been discussed a thousand times, but for us less knowledgeable bowlers can someone please explain to me what the different pin distances on a ball mean.

I know when ordering a bowling ball, you can choose your pin distance, but i really don't know what that means.

Lets say I've got a Tsunami with a 1-2" pin, how would it react differently from one with a 3-4" pin?

Just curious because i just ordered my first short pin ball and my proshop said that pin out balls are better...

Thanks,
Troy
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Fatboy8

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Re: pin placement
« Reply #1 on: January 25, 2006, 07:35:45 AM »
The longer the pin, the more drilling options you have. Having that short of pin limits alot of drilling and pin placements you will have. Hope that helps!
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Pinbuster

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Re: pin placement
« Reply #2 on: January 25, 2006, 07:53:26 AM »
Like Fatboy said it is mostly about drilling options.

Assuming a “normal” PAP (Positive Axis Point) of 5+” over.

With a short pin you are limited in how far you can move the pin from the center of your grip without having to drill a weight hole.

A 3 to 4 inch pin allows the driller to drill over the label and put the pin a variety of positions out to a maximum leverage position of 3 3/8” from your PAP.

We found that for bowlers with low tracks that pin in (some less than 1”) balls often worked very well. But some of this was because of the low track the pin was still in a good leverage position.
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shelley

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Re: pin placement
« Reply #3 on: January 25, 2006, 08:33:33 AM »
In general, shorter pins tend to read the lane sooner and have a more even reaction.  Longer pins tend to go a little longer with a little more backend reaction.  As others have said, drilling options may be limited with extremely short or long pins.  Drilling a 5+" pin ball stacked leverage (pin and CG 3 3/8" from PAP) may require a monster weight hole.  Likewise, you probably couldn't do a pin-axis drilling (pin-on-PAP) with a 1/2" pin unless the top weight was stupidly low (which is probably fine anyway).

As far as the difference between a 1-2" pin Tsunami and a 3-4" one, a Throwbot might notice a difference in reaction given the same drilling, but since the Tsunami has a PSA (the second pin about 7" from the primary one), the CG location and pin distance should have a fairly small effect.

SH
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dizzyfugu

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Re: pin placement
« Reply #4 on: January 25, 2006, 08:55:30 AM »
Pin distance means the distance between the pin and the measured and marked CG on a ball (punch mark, concentric circles etc.). The bigger the distance, the larger the mass bias of the core is (since it is shifted sideways from the central pin position) and the mor pronounced tha ball reaction can be set up by pin and CG placement.
Pin-in balls will react a bit "tamer" or smoother than pin-out balls, but the difference is minimal. The drilling itself will mostly determine the ball reaction.
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Troyboy

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Re: pin placement
« Reply #5 on: January 25, 2006, 08:59:39 AM »
thanks all, this is great info
troy
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