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Author Topic: gradient x-holes  (Read 3527 times)

dballz

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gradient x-holes
« on: April 08, 2010, 02:00:16 AM »
when using the gradient x-hole process by Mo Pinel, do any of you pitch the x-holes? does it depend on what your static weights are, in correlation to how the hole is pitched and such? i know static weights do not matter.
i drilled up an Onyx Vibe and it had 2oz of side before the x-hole. at the P2 location, i used a 15/16" bit and went 2 1/2" down and it only removed around 5/8 or so. ended up going up to a 1" bit and drill 3" down to finally get it a little less than 7/8oz. dont use grips, so even though ring finger was drilled a little deeper, it didn't do much help.  wondering if i should have pitched the hole towards the center of the grip or a different way, instead of 0/0, so that maybe i would have hit the core a little more than i did. i know Mo's websits states to normally use a 1" bit, but i barely touched the core.

i am just curious as to what others do.
thanks.
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kmanestor22

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Re: gradient x-holes
« Reply #1 on: April 08, 2010, 01:33:27 PM »
Just curious, what was the top weight prior to drilling?  Sounds like you're gonna end up with a crater.  Probably shouldn't have layed it out with so much side weight.
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dballz

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Re: gradient x-holes
« Reply #2 on: April 08, 2010, 01:43:54 PM »
not sure what the weight was. i ended up using a 1" bit and went 3" down. was able to get it under 7/8 for the side weight.

i weighed the ball before drilling, but figured it wouldn''t take much to get over an ounce of side weight out. shows what i know.....

i spoke to someone at Hammer and they stated that sometimes when the pin is moved right, it causes the little puck to shift some, there for needing a different size or placement of x-hole than normal. either way, i was able to get it legal. they said that the hole will probably take away the jerk reaction from the ball downlane, which is actually not a bad thing. i was hoping for something that read the midlane well and rolled. nothing real snappy. this should work....

Edited on 4/8/2010 1:47 PM
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Xplosive89

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Re: gradient x-holes
« Reply #3 on: April 08, 2010, 02:47:20 PM »
Just take a 1 1/8" bit and shave off the sides of the hole, will take enough out of it to where you will not have to worry about it if you go to nationals. they can mark it as illegal if it is close enough to 1oz side.

I laid my onyx vibe out with a 45x5x37 layout and put a weight hole on my PAP/p1 to cut the flare down and smooth the ball out a bit. the hole is 3 inches deep using a 1 1/16" bit, has about 1/4 oz side weight on it.
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dballz

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Re: gradient x-holes
« Reply #4 on: April 09, 2010, 08:52:46 AM »
i will run it thru the scale before i leave for Reno, just to double check the weight. will use the 1 1/8" bit idea if it is closer than i thought. thanks!

used it lastnight in league and it rolled really well. picked up in the midlane as i hoped it would and made a strong, continous move. the lanes were a little drier, but it allowed me to get in and see what it could do if i had to cover some boards. the ball recovered great. will knock the shine off it and see what it does on a little heavier volume.
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MattC7

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Re: gradient x-holes
« Reply #5 on: April 09, 2010, 09:19:55 AM »
quote:
so even though ring finger was drilled a little deeper, it didn't do much help.  wondering if i should have pitched the hole towards the center of the grip or a different way, instead of 0/0, so that maybe i would have hit the core a little more than i did. i know Mo's websits states to normally use a 1" bit, but i barely touched the core.


The vibe core is pretty small and dense compared to others. You'ld have to go deep to really get into it.  If you need to remove alittle more finger, you can always go further down in the ring.  Be wary that you might touch the finger holes at that point down, but while it will void your warranty, there shouldn't be too much to worry about
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kidlost2000

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Re: gradient x-holes
« Reply #6 on: April 09, 2010, 09:59:24 AM »
Keep in mind USBC regulations on hole depth as well. Your finger holes shouldn't touch if you pitch them away from each other.
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MattC7

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Re: gradient x-holes
« Reply #7 on: April 09, 2010, 10:14:03 AM »
quote:
Keep in mind USBC regulations on hole depth as well. Your finger holes shouldn''t touch if you pitch them away from each other.
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quote:
Section 2. Drilling Specifications

a. Holes - The following limitations govern drilling holes in a bowling ball:

1. Holes or indentations, not to exceed five, for gripping purposes.

2. One hole for balance purposes, not to exceed 1-1/4 inch in diameter.

3. One (1) vent hole to each finger and/or thumb hole, not to exceed 1/4 inch in diameter.

4. One mill hole for inspection purposes, not to exceed 5/8 inch in diameter and 1/8 inch in depth.

b. Balance - The following tolerances are allowed in the balance of the ball:

1. For a ball weighing 10.01 pounds or more:

a) Not more than three ounces difference between the top of ball (finger hole side) and the

bottom (solid side opposite finger holes).
b) Not more than one 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.


4" deep should be ore than enough to get him legal wthout issue. At this depth, most with a standard 1/4" bridge, and an inch of separation between pitches will hit.  It''s not the end of the world.

Where are there listings for depth limitations? I''ve seen size limits on x holes,

Edited on 4/9/2010 10:19 AM
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Laniarty

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Re: gradient x-holes
« Reply #8 on: April 09, 2010, 10:56:02 AM »
Didn't I hear something about Parker Bohn having a weight hole drilled almost through the ball this year?
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J_Mac

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Re: gradient x-holes
« Reply #9 on: April 09, 2010, 11:06:14 AM »
quote:
Didn't I hear something about Parker Bohn having a weight hole drilled almost through the ball this year?


If a hole is taken much deeper than 4 1/4" it will start to "add" weight to the side of the ball it started on.
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MattC7

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Re: gradient x-holes
« Reply #10 on: April 09, 2010, 01:24:36 PM »
quote:
Didn't I hear something about Parker Bohn having a weight hole drilled almost through the ball this year?


He used, i believe a 2.5, with a balance hole almost 7" deep I believe.
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