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Author Topic: Symmetric Core  (Read 1639 times)

60bowler

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Symmetric Core
« on: May 02, 2008, 01:39:27 PM »
Does anyone know, on the new "Total Inferno" ball (made in Mexico) is the CG marked only by a very small indentation? with the MB being 6 3/4 from the pin through this small dent. On the Brunswick Web site the drilling instructions shows only a "CG AREA" nothing related to any point of reference.

Refer to page 5 from Brunswick web site
http://www.brunswickbowling.com/uploads/L7/cc/L7ccVnpAUP6FRGMWVu0Bbw/Advanced-Drilling-Instructions---Symmetric--Asymmetric---December07.pdf

Thanks for any help in this matter
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Dave Hansen
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shelley

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Re: Symmetric Core
« Reply #1 on: May 02, 2008, 09:50:21 PM »
The TI is a symmetric cored ball, and Brunswick has marked their CGs with a small punch mark for a very, very long time.  There's no MB mark, ignore the instructions for "CG area" and MB positions and stick with the standard symmetric layouts.

SH
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DON DRAPER

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Re: Symmetric Core
« Reply #2 on: May 02, 2008, 11:15:29 PM »
i've been using only brunswick equipment since 1995 and every ball with a symmetrical core has used a small punch mark for the location of the cg. i'd say it's safe to assume that this method was used before 1995 as well.
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dizzyfugu

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Re: Symmetric Core
« Reply #3 on: May 04, 2008, 02:48:39 AM »
THe "CG area" indication is IMHO very sensible, because the drilling instructions only give general guidelines where to place pin, CG and in some cases the MB/PSA marker to achieve a desired reaction. Pin distances differ from ball to ball, so the final end position on a ball is individual, and its location is not very critical - if it ends up its indicated area, you are fine.
Despite this, from the ball's side, also remember that the suggested layouts might differ in reality because you have to take into account the bowler's PAP. Drilling instructions tend to be based on very "Average" PAP figures, so a very high or low track will change the final setup from what is displayed in the drilling sheet. It is only a technical foundation for waht to do when you want to achive a certain reaction for the ball driller. Do not take it as an exact blueprint!
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DizzyFugu - Reporting from Germany

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DizzyFugu ~ Reporting from Germany
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