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Author Topic: Asymmetrical vs. symmetrical  (Read 1766 times)

justinmill14

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Asymmetrical vs. symmetrical
« on: June 03, 2009, 01:07:55 PM »
This may be a dumb question, but I was wondering what the exact difference is between the symmetrical balls and asymmetrical balls. Thanks
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J_Mac

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Re: Asymmetrical vs. symmetrical
« Reply #1 on: June 03, 2009, 09:29:02 PM »
In one sense -
Symmetric balls don't have a preferred spin axis until holes are drilled into them.  

Asymmetric balls have a preferred spin axis before and after holes are drilled in it, and it takes large and deep holes to move that PSA in really strong asymmetric pieces.



Edited on 6/3/2009 9:39 PM
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Re: Asymmetrical vs. symmetrical
« Reply #2 on: June 03, 2009, 09:34:00 PM »
On a symmetrical ball the weight of the core is the same all the way around it, in other words a mirror image, so to speak.
 
The opposite is true with an asymmetrical core. It will not be the same weight distribution on all sides.

In my opinion, the symmetrical core balls will tend to be more "forgiving" for bowlers whose release isn't perfect every time. The asymmetrical core balls can make you look great if your release is good and consistent, or not so great if it's not.


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Lane Carter, Strike Zone Pro Shops - Salt Lake City, Utah
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www.brunswickbowling.com

The opinions expressed are solely those of the writer and not of Brunswick Corporation.
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Aloarjr810

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Re: Asymmetrical vs. symmetrical
« Reply #3 on: June 04, 2009, 08:12:56 AM »
A symmetrical ball
No mass bias marking on the ball, just pin and cg.
Has a weight block that would have equal halves if the weight block were cut in half.

A asymmetrical ball
Mass bias, pin and cg all marked on the ball.
Has a weight block that would have unequal halves if the weight block were cut in half.


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Aloarjr810
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Edited on 6/5/2009 5:23 PM
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Lefty210

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Re: Asymmetrical vs. symmetrical
« Reply #4 on: June 04, 2009, 08:33:20 AM »
symmetrical balls have a tendency to be more of a rolling nature where as asymmetrical one tend to change directions sharper
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justinmill14

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Re: Asymmetrical vs. symmetrical
« Reply #5 on: June 04, 2009, 09:56:43 AM »
quote:
A symmetrical ball
No mass bias marking on the ball, just pin and cg.
Has a weight block that would have equal halves if the weight bloack were cut in half.

A asymmetrical ball
Mass bias, pin and cg all marked on the ball.
Has a weight block that would have unequal halves if the weight bloack were cut in half.


Thanks, I always wondered why some balls would have a mass bias and others wouldn't.
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BrianCRX90

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Re: Asymmetrical vs. symmetrical
« Reply #6 on: June 05, 2009, 12:13:44 AM »
Another way to explain it symmetric ball roll down the lane more evenly because the distribution in the core is even in rotation and asymmetrical balls cores are not even in weigh distribution causing the ball to "wobble" giving the ball more friction to oil because it it not rolling evenly.

Seems like I watched something on this and they explained this and makes sense. I rolled a symmetric and asymmetric ball and looked at the rings of oil all the way around.
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