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No Thumb hole
  #1  
Old 01-02-2011, 12:40 AM
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No Thumb hole

Bowler=d against a guy Thursday that is a no-thumber and didn't have a thumb hole in any of his strike balls.

Just curious if anybody has drilled there equipment that way that was either a 2 handed or a no thumber.

If so how did it react and what did you do on the layout?
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Re: No Thumb hole
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Old 01-02-2011, 12:59 AM
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Re: No Thumb hole

I believe the center of grip is in the center of the bridge and the mid line is perpendicular to that line. After that, it's all the same, except (I think) the static weights allow for up to 3oz in all weights (finger, side and top).
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Re: No Thumb hole
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Old 01-02-2011, 02:42 AM
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Re: No Thumb hole

From the USBC equipment specs manual

Quote:
Balance:
The following tolerances shall be permissible in the balance
of a bowling ball used in certified competition:
1. 10.01 pounds or more:
a. Not more than 3 ounces difference between top
half of the ball (finger hole side) and the bottom
half (side opposite the finger holes).
b. Not more than 1 ounce difference between the
sides to the right and left of the finger holes or
between the sides in front and back of the finger
holes.
c. A ball drilled without a thumb may not have more
than 3 ounces difference between the top half and

bottom half of the ball.
Still only a max of one ounce side weight
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Re: No Thumb hole
  #4  
Old 01-02-2011, 09:27 AM
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Re: No Thumb hole

Maybe I've got an old copy of the manual, but this is what I've got on page 8:

c. A ball drilled without a thumb hole may not have
more than 1 ounce difference between any two
halves of the ball.


Re: No Thumb hole
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Old 01-02-2011, 10:27 AM
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Re: No Thumb hole

Quote:
Originally Posted by RevZiLLa View Post
From the USBC equipment specs manual



Still only a max of one ounce side weight
I stand corrected
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