BallReviews
General Category => Miscellaneous => Topic started by: Elimeno Pee on November 05, 2013, 03:53:57 AM
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I realize there is a difference between everyone and there release. Is there a standard rule of thumb for weight holes?
if fingers are north, thumb south. further south mean more hook? is there and east/west bearing n it too? what does angle, size, and depth do to the reaction?
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The further south is usually referred to as P1 thru P4. P1 is normally considered Midline. The further south doesn't mean more hook, it means an earlier roll, and can give the appearance of more hook. The depth, diameter and angle of the hole have an affect on the roll, but I don't know the specifics on exactly what they all do. You will have to look that up or ask someone who drills for a living about that.
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The P1,P2,P3,P4 locations refer to what's called the "Gradient Line Balance Hole".
The gradient line was originally a line drawn from the PSA to the PAP and divided into 4 equal sections.
This has been changed slightly because they found a weaker spot than the PAP existed.
After the original Gradient Line technique was published it was found that a weaker spot than the PAP existed. This spot is 6 3/4" from the psa on the VAL. That is now P1. The line extends from P1 to the PAP, then a second line is drawn from the PAP to the psa. The lengths of the two line segments are added, then divided by three to determine spacing between P1, P2, P3, and P4. The line is actually a continuum, and balance holes can be drilled between the 4 points.
You can read about it here:
http://wiki.bowlingchat.net/wiki/images/c/c6/GradientLine.pdf (http://wiki.bowlingchat.net/wiki/images/c/c6/GradientLine.pdf)
and here:
http://wiki.bowlingchat.net/wiki/images/4/4a/Gradient_Line_Hand_Out.pdf (http://wiki.bowlingchat.net/wiki/images/4/4a/Gradient_Line_Hand_Out.pdf)
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OP: Your post is a little hard to understand, but this video is a good starting point for understanding weigh thole location and it's effect on reaction:
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Just from what I have learned thru experimentation, weight holes have many names. Balance holes; X-holes; double thumb holes; motion holes; they are all the same just used for different purposes and different effects.
From what I have learned, the lower balance holes, (ie:double-thumb holes) tend to make your ball read earlier, but give it a strong, dynamic angle of entry on the backend, usually fairly angular.
Whereas the smaller, X-holes further from your fingers, and closer to the val tend to re-shape your hook/arc, dependent on whether you move it north-south, or east-west. Moving it north on or near the val, tends to push my breakpoint further down lane. Smaller weight holes for me tend to make for a sharper, more distinct move on the backend. Widening my holes increases flare, usually, but on some balls with a big core it actually stabilizes, or smooths reactions.
This may sound strange but a big weight hole can increase flare but smooth reaction, so much so that the ball seems to "walk to the pocket.
There are a lot of factors to take into account, including cover prep, and core engine when you use a weight hole to shape the reaction you want. You should experiment.....it's fun to get so many differnt looks!
P.S. Thanks for the video DP3! This vid kind of explains why I tend to like certain weight holes over others. Since I am a straighter player, I would tend to be more comfortable withe the decreasing and higher weight holes, rather than the lower flare increasing ones. It all makes sense!
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Very cool video, very helpful DP3. if north goes long and strong, and east (high flare) gets aggressive, would a weight hole north and east do both?