Author Topic: what is the effect vs the depth of finger holes (Read 10481 times)

lane1lover · « **on:** January 28, 2009, 06:16:57 PM »

what is the different of ball rolling or backend reaction if drill the finger holes with 1 and 1/8 depth or 2" depth ? what is the effect between pin up or pin down ?

will 1 and 1/8 depth alter the the core shape ?

tenpinspro · « **Reply #1 on:** January 29, 2009, 01:08:06 PM »

quote:
what is the different of ball rolling or backend reaction if drill the finger holes with 1 and 1/8 depth or 2" depth ?

Hey lane1,

This depends on a few factors, core shape/size/weight/width of finger holes and layout. If your finger holes are near the pin (or top of the core) and drilling deeper does go into the core, we will be shortening the core which causes a ball to roll a little sooner (shorter cores spin/rev faster compared to longer/taller cores). It's another slight tweak to bring a breakpoint closer to us. *Learned this little trick from Del Warren and Pursel when I worked for them as Tech Support.

On heavier cores (ie. Mo's LEVrg series or Track's Rising series), this change in distance may not make that much a difference as the cores are so heavy (7lbs+). It would take a larger bit and a deeper depth to offset some of the overall weight.

quote:
what is the effect between pin up or pin down ?

A pin down should still respond sooner compared to the pin up with all other factors being equal.

quote:
will 1 and 1/8 depth alter the the core shape?

This again depends on whether or not you are hitting the core. If the core shape/positioning is such that 1 1/8 doesn't hit the core, you will only be altering or removing static weight.

Hope this helps some...

--------------------
Rick Leong - Ten Pins Pro Shop
Tag Team Coaching - Co-Founder
"El" Presidente of the Legion

lane1lover · « **Reply #2 on:** January 30, 2009, 12:56:15 AM »

thanks for reply,

all of my ball are drilling 1" 1/8 deep, some of them are very unstable at the backend and always in 'hooking' stage which cannot truely promote to rolling, just in between hooking and hook-out stage, i am struggling some 2-4-8-10 split that make me think about to drill the finger hole deeper as 2" deep. most of my ball are pin up, 1" above the ring finger, do you think it can help if I drill them deeper ?

tenpinspro · « **Reply #3 on:** January 31, 2009, 02:05:12 AM »

quote:
i am struggling some 2-4-8-10 split that make me think about to drill the finger hole deeper as 2" deep. most of my ball are pin up, 1" above the ring finger, do you think it can help if I drill them deeper ?

The 2-4-8-10 is a typical leave from a ball that is finishing late into the pins with a strong angle. Based on your description of your layouts of the pins being up above ring, this may be part of your problem in getting the ball to transition properly or soon enough.

We could do a couple of things before having to drill the finger holes. What ball(s) are you using and what is the finish on it? You may be able to take down the cover of that ball to get it to read the mids sooner so it responds earlier thus allowing it to transition properly in the backend friction area.

Another way is to drill a balance hole or enlarge it (if static limits permit). By doing so, we increase the differential and that may do the trick also.

I personally find Lane1 equipment to be a little "rolly" or "lopey" so this may explain why you're getting so much push thru the front and mids, thus not getting the proper reaction.
--------------------
Rick Leong - Ten Pins Pro Shop
Tag Team Coaching - Co-Founder
"El" Presidente of the Legion

Edited on 1/31/2009 10:38 AM

lane1lover · « **Reply #4 on:** January 31, 2009, 04:23:42 AM »

tenpinspro,

thanks for your information, i also found it is often in those 'pearl' ball, yes, mostly on lane1 pearl ball. I also want to drill the balance hole to alter the core for better transition of the hook-rolling. and this is why i wonder it may be caused by the finger holes are not deep enough to hit the core.

your information is very useful, thank you very much !

tenpinspro · « **Reply #5 on:** January 31, 2009, 09:59:53 AM »

No problem lane1, you're very welcome.

Okay, that also explains it. It's the pearl ball doing this as that ball would tend to push farther down lane naturally. The pattern may be a touch long for that piece or you may want to consider to start placing a couple of pieces with the pin closer to your pap so your reaction from skid/hook/roll will be more proportionate as your ball comes out of the pattern.
--------------------
Rick Leong - Ten Pins Pro Shop
Tag Team Coaching - Co-Founder
"El" Presidente of the Legion

Author Topic: what is the effect vs the depth of finger holes (Read 10481 times)

lane1lover

what is the effect vs the depth of finger holes

tenpinspro

Re: what is the effect vs the depth of finger holes

lane1lover

Re: what is the effect vs the depth of finger holes

tenpinspro

Re: what is the effect vs the depth of finger holes

lane1lover

Re: what is the effect vs the depth of finger holes

tenpinspro

Re: what is the effect vs the depth of finger holes