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Author Topic: Drill Layout For Inverted Track Cranker  (Read 8944 times)

grober02

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Drill Layout For Inverted Track Cranker
« on: December 03, 2004, 07:02:47 AM »
I am seeking some advice on how to drill my equipment.  I am a right-handed cranker with an inverted track.  The track rolls over the middle finger and one inch left of the thumb.  I have been bowling for many years like this, and my release is consistent.  I have the utmost respect for my pro-shop operators, as they have worked extremely hard in trying to develop a layout that will work for me.  We have tried a reverse full-roller on a Track Phenom, but that tamed the reaction too much.  They drilled my last three balls fairly similar (Morich Colossus, Track Animal, Morich Total Annihilation).  I still roll over the middle finger, but my reaction is strong, continuos, consistent, etc.  What I am searching for is a slight variation from the major layouts, nothing drastic, that may cure this problem.  I have a Lane #1 Super Carbide Bomb and a Morich Ravage on the way.  I would like to try someone's suggestion with either of these balls.  Any help would be most appreciated!

The Morich Annihilation w/ 4" pin is drilled pin to PAP distance 4 5/8", pin above and to right of ring finger approx. 1 1/8". CG kicked out and is 2 5/8" from PAP.  MB is 3 3/4" from PAP in strong position.  Weight hole on PAP.
The Track Animal w/ 3" pin is drilled pin to PAP distance 4 1/4", pin above and to right of ring finger approx. 1 1/2 ".  CG kicked out and is 2 1/4" from PAP.  MB is 4 1/4" from PAP in strong position.  Weight hole on PAP.
 
Profile:
R.H. throwing 15lb.
Track: inverted/high
Revs: cranker, medium-high revs
Ball Speed: 16-17 MPH
Axis tilt: minimal, 5-10 degrees
PAP: 5 1/4" over on midline

 

louie

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Re: Drill Layout For Inverted Track Cranker
« Reply #1 on: December 03, 2004, 04:17:22 PM »
I also have an inverted track. I find that symmetric cores roll best. In particular, high rg low differential cores with a reactive coverstock have given me my best reaction. In terms of drilling, keep the pin at finger height or above and you'll be fine.
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Why does everyone laugh when I bowl?


louie

Why does everyone laugh when I bowl?


louie


grober02

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Re: Drill Layout For Inverted Track Cranker
« Reply #2 on: December 03, 2004, 06:46:33 PM »
Thanks for the replies thus far.  I was actually leaning towards the 'label high pin' layout on Lane #1's SCB drilling specification sheet because it most resembles my current equipment.  I spoke with a Lane #1 rep, and he told me that because of my inverted track, there is no need to kick out the CG.  I guess what he's telling me is that because of my grip and hand release, I naturally kick out the CG on my own.  He too recommended a label drilling with the pin level or higher than the fingers.  I just had the Dirty Bomb drilled up about two weeks ago.  I selected this ball for a second shift house shot on AMF synthetics.  Initially, the DB was drilled similar to the 'high pin over bridge' layout on Lane #1's spec sheet.  The pin was centered approximately one inch above the bridge.  This ball went too long for me and missed the breakpoint (still hitting middle finger).  I then had it redrilled similar to the SCB drilling mentioned above, moving the pin further right and adding a weight hole.  This ball started up earlier, but it lost some aggressiveness in the backend (still hitting middle finger).  So far, I guess I'll stick with a high pin positioned to the right unless I hear a better setup.

JohnP

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Re: Drill Layout For Inverted Track Cranker
« Reply #3 on: December 03, 2004, 10:01:24 PM »
grober02 -- For the Ravage, I would suggest that you contact the Morich service group.  With your problem, you may be able to get a suggestion from Mo himself.  I would also suggest double checking your PAP information.  You say you are inverted, but a PAP on the midline is not inverted, it is equal distant from the thumb and fingers.  And 5 1/4" over is not as high as you say you are.  Unless the track you're describing is after the ball has flared instead of the initial track.  Assuming you are high and inverted, if you want to get the track off of the finger holes, you might try locating the pin between the midline and the thumb hole.  That should put your bowtie just about next to the thumb and reverse the flare.  The track should start out on the finger holes but then flare away from them.  With the bowtie beside the thumb, the flare should not take the track into the thumb hole.  I have never drilled a ball like that, just going by the theory I've been taught, so talk to your driller and try it on an old ball first.  If anyone else on this board disagrees they are probably right.  --  JohnP

grober02

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Re: Drill Layout For Inverted Track Cranker
« Reply #4 on: December 04, 2004, 09:34:00 AM »
I rechecked my PAP, and it's approximately 5 1/2 over and 2 1/8 down.  Hopefully, this corrected info will help.

JohnP

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Re: Drill Layout For Inverted Track Cranker
« Reply #5 on: December 04, 2004, 09:53:50 AM »
grober02 -- OK, the 2 1/8" down PAP coordinate does make the track strongly inverted.  It sounds like KOTM disagrees with my suggestion, I'm interested in what he has to say.  I hope to use this thread to learn more about unusual layouts.  --  JohnP

JohnP

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Re: Drill Layout For Inverted Track Cranker
« Reply #6 on: December 06, 2004, 09:30:33 AM »
KOTM -- I based my comment on reversing the flare on a very low track (almost a spinner) customer of mine.  He had a ball drilled at another shop - very knowledgeable driller - with the pin at approx leverage but in the positive thumb quadrant, just above and to the right of the thumb hole.  I drilled a Black Cherry Bomb for him with the pin at leverage but above and to the right of the finger holes.  The tracks on the two balls are completely different.  The track on the BCB is almost on the bottom of the ball by the time the flare is complete, on the other ball it's much closer to the thumb hole.  I thought the difference was because the flare had reversed on the other ball.  If that's not the case, what do you think causes this large difference in track location?  There is essentially no difference in spans, pitches, etc., but the other ball does have a weight hole (I'd have to take a closer look to tell you exactly where) while the BCB does not.  --  JohnP

hskrntx

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Re: Drill Layout For Inverted Track Cranker
« Reply #7 on: December 06, 2004, 09:33:37 AM »
Unless I missed them, you haven't given what your finger and thumb pitches are! According to Mo at the seminar I attended, you can also move your track by changing the pitches of the fingers and thumb!
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grober02

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Re: Drill Layout For Inverted Track Cranker
« Reply #8 on: December 06, 2004, 10:23:22 AM »
John--
Thanks for the input.  I would just like to say that although I am an avid bowler, I am still a little rough around the edges when it comes to layouts and technical data.  So please bear with me as I appreciate and value everyone's expertise.  
My equipment, including the Total Annihilation is drilled as though my PAP is 5 1/4" over.  My actual PAP is 5 1/2 over 2 1/8 down.  I think we stuck with the drillings of a more convential 'high' track because it yielded satisfactory results.  Now, I am looking for a layout that utilizes my actual PAP.  Yes, the track flares off the MF.  Amazingly, my Track Animal and Total Annihilation do not making any thumping noise when rolling.  I do have a Hammer Viscious reactive pearl with the pin placed just right of the ring finger that does make a thumping noise the entire length of the lane.
Now, I will explain what I meant by a reverse full roller layout.  This is a 15lb Phenom with a 3” pin-out.  The pin is located 4 ¼” from PAP (using 5 1/4 over PAP) roughly in the positive thumb quadrant where the MB is usually located.  It's about 5 o'clock in reference to the CG.  The MB is located 1 inch above and just to the right of the ring finger.
Can you clarify a few things for me?  When you say 5" pad, do you mean 5" distance from pin to PAP?  What do you mean by 'plant a tree'?  I think the SCB is going to be a 3" pin-out.  What kind of reaction would you expect from both layouts mentioned above?  I don't mean ball specific, but as a direct result of pin placement to my actual PAP of 5 1/2" over & 2 1/8" down?  Unfortunately, because of my unorthodox style, I cannot reference hook ratings listed on most manufacturers drill sheets.
I cannot measure my finger pitches without visiting my proshop.  However, some seem to think that altering the finger pitches would help?  I wonder if this should be tried on an existing ball or in conjunction with the new/experimental layout.  
Lastly, I am curious about the placement of the weight hole on my Total Annihilation.  As I stated above, the weight hole is placed on what I thought my PAP was (5 ¼” over).  I know that depth and size of the weight hole has a lot of influence on the reaction of the ball as do the placement of the weight hole.  In actuality, with my correct PAP of 5 ½” over and 2 1/8” down, the weight hole is above my PAP.  Does this tame the ball down even more than placing the weight hole on the PAP?  Also, where should the weight hole be placed, if necessary, on the SCB w/ 3” pin-out?
Thanks to everyone who has contributed information in this thread!

JohnP

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Re: Drill Layout For Inverted Track Cranker
« Reply #9 on: December 07, 2004, 09:44:45 AM »
KOTM -- Great pictures!!  I see exactly what you mean.  I don't want to hijack this thread, but others might be interested also.  What are the advantages (other than the final track looking more "normal") of the pin being in the positive thumb quadrant for a very low track customer?  Thanks  --  JohnP

JohnP

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Re: Drill Layout For Inverted Track Cranker
« Reply #10 on: December 08, 2004, 09:39:11 AM »
KOTM -- PM sent to avoid further hijacking of this topic.  --  JohnP