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Author Topic: What is a weak drilling?  (Read 9842 times)

Miffy1980

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What is a weak drilling?
« on: February 27, 2010, 02:28:52 PM »
Im still learning and here is a qns that would help give me a clearer picture of what i have been reading so far.

1)What is a weak drilling in terms of pin to pap distance very generally generally speaking. I sort of figured out 3 3/8 pin to pap is as strong as it gets.

But in some post where a weak drilling is mentioned so i thought i ask. Is it having the pin as close to the pap?



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TWOHAND834

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Re: What is a weak drilling?
« Reply #1 on: February 27, 2010, 10:42:47 PM »
The weakest drillings are pin on your PAP and pin at around 6 1/2 from PAP.  Layouts that minimize flare potential are considered weak drillings.
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Miffy1980

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Re: What is a weak drilling?
« Reply #2 on: February 27, 2010, 11:11:56 PM »
thanks 2hand.

then can i carry on to ask what is the difference with a pin on pap (i would imagine the core to be horizontal) and a 6 1/2 inch pin to pap (the core to be perpendicular to your axis)

am i correct that the pin on pap layout gives u earliest roll?

what does the 6 1/2 pin to pap do? does it make the ball go longer and used on very dry conditions?
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BigBaller

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Re: What is a weak drilling?
« Reply #3 on: February 27, 2010, 11:14:02 PM »
It puts the core in a stable position...Either way.
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AngloBowler

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Re: What is a weak drilling?
« Reply #4 on: February 28, 2010, 03:41:41 AM »
Either way, no flare. The 6 1/2" pin will rev up later (because it's rotating over the high RG axis) so will get extra length. The pin on PAP will roll earlier, as you're rotating the ball around the smallest RG axis.

I would say anything 5.5" or longer is a weak drilling, as is anything 1" or closer to the PAP.
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Miffy1980

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Re: What is a weak drilling?
« Reply #5 on: February 28, 2010, 06:58:26 AM »
thanks big and anglo,

o really appreciate you guys dumbing it down so i can understand it. haha.

i get the picture now.

so basically if i wan more length i get my core as close to the high rg axis as possible (generally speaking of course)

you guys are great.
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charlest

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Re: What is a weak drilling?
« Reply #6 on: February 28, 2010, 07:08:49 AM »
On symmetric/non-Mass Bias cores, weak drillings are generally 5" or 5.5" pinto PAP.

On asymmetric or Mass Bias cores, weak drillings are 1.5" to 2.5" pin to PAP (least flare).
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Miffy1980

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Re: What is a weak drilling?
« Reply #7 on: February 28, 2010, 08:01:52 AM »
Hi charlest

wat would constitute a pin on pap or short pin drilling on a sym core?

on the flip side, u wouldnt call a 6 1/2 pin on an asym/ mass bias ball a weak drilling?
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charlest

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Re: What is a weak drilling?
« Reply #8 on: February 28, 2010, 02:51:25 PM »
quote:
Hi charlest

wat would constitute a pin on pap or short pin drilling on a sym core?


tyring to make a ball do nothing but roll.
I suppose at times for some people this can work, but it is an extremely specialized arsenal weapon.
quote:

on the flip side, u wouldnt call a 6 1/2 pin on an asym/ mass bias ball a weak drilling?


Nope. According to Mo Pinel, THE expert on mass bias balls, it provides maximum flare. Anything from about 3" on out, for a mass bias balls does that.
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six pack

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Re: What is a weak drilling?
« Reply #9 on: February 28, 2010, 03:06:37 PM »

Nope. According to Mo Pinel, THE expert on mass bias balls, it provides maximum flare. Anything from about 3" on out, for a mass bias balls does that.
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"None are so blind as those who will not see." [/quote]

I'm confused as to why other manufacture's drill instructions clearly shows a 5"pin from pap lay out as a length lay out on their asymmetrical cores. is it just different for Mo Rich cores?
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charlest

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Re: What is a weak drilling?
« Reply #10 on: February 28, 2010, 03:51:44 PM »
quote:
quote:

Nope. According to Mo Pinel, THE expert on mass bias balls, it provides maximum flare. Anything from about 3" on out, for a mass bias balls does that.
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"None are so blind as those who will not see."


I''m confused as to why other manufacture''s drill instructions clearly shows a 5"pin from pap lay out as a length lay out on their asymmetrical cores. is it just different for Mo Rich cores?
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The harder I try the harder they fall


I don''t know. I do know that they roll differently. Ask Mo.
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Edited on 2/28/2010 4:56 PM
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icewall

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Re: What is a weak drilling?
« Reply #11 on: February 28, 2010, 09:02:58 PM »
according to mo:

Large Track Flare
2 ¾” to 6 ¼” from PAP

Pin distances closer to 6 ¼” produce more FORWARD ROLL
(less axis rotation)
 

Pin distances closer to 2 ¾” produce more SIDE ROLL
(more axis rotation)
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JohnP

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Re: What is a weak drilling?
« Reply #12 on: March 01, 2010, 09:39:28 AM »
quote:
Large Track Flare
2 ¾” to 6 ¼” from PAP


That's for balls with asymmetric cores, for symmetric cores max flare is 3 3/8" pin to PAP.  --  JohnP
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Miffy1980

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Re: What is a weak drilling?
« Reply #13 on: March 01, 2010, 10:42:50 AM »
hey hi john. thanks for the reminder

may i ask, when it comes to asym balls, ie balls with pre drill mass bias, how do we determine how "mass bias-ish" from the specs and figures?
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JohnP

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Re: What is a weak drilling?
« Reply #14 on: March 01, 2010, 08:54:43 PM »
quote:
may i ask, when it comes to asym balls, ie balls with pre drill mass bias, how do we determine how "mass bias-ish" from the specs and figures?


Asymmetrically cored balls will have two differentials, the standard RG differential and a mass bias (or intermedate) differential.  The higher the mass bias differential the stronger the mass bias affect.  --  JohnP
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