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#151168 - 05/05/11 07:35 PM Making Molded Thumb in Turbo Switch grips
ijohn83 Offline
4x Virtual League Champion

Registered: 10/13/07
Posts: 950
A/S/L: 54/male/Palmdale, California U...
Hi friends.

I thought I would post this Video I made with my Daughter. This, I hope is the end of my trek to get a perfect thumb hole for me. My issue is that the base of my thumb is bigger than my knuckle when I put my thumb all the way into a bowling ball. I was having the perfect oval slugs made, then having a round drill open up the top 1 5/16 round and 1/2" deep to get my thumb all the way in to its crease. This was causing the top of the thumb slugs to break and the ball to chip, along with making the slugs hard to put in & out. This solution has fixed all that and has, some how, cut my ball speed from 18.5 to 16.0?






Feed back wanted.

~ John

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Legend

Registered: Fri Aug 27 2004
Posts: 10100
A/S/L: Mountain View, CA
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#151175 - 05/05/11 10:33 PM Re: Making Molded Thumb in Turbo Switch grips [Re: ijohn83]
B-Hammer Offline
Legend

Registered: 04/19/09
Posts: 1818
A/S/L: 30/M/Bellingham WA
You and your daughter did a great job, very in depth. Do you do different slugs for different times of the year, or how do you account for when your thumb changes sizes?

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#151178 - 05/05/11 11:23 PM Re: Making Molded Thumb in Turbo Switch grips [Re: B-Hammer]
ijohn83 Offline
4x Virtual League Champion

Registered: 10/13/07
Posts: 950
A/S/L: 54/male/Palmdale, California U...
The thumb slug I used for my thumb mold was my best one. The hole was drilled for my proper reverse & right pitch, along with the proper oval with room for two black tapes. So when I use them now I have two black tapes in them. With summer coming I might go to only one black tape.
When I was harder on my thumb I had 2nd & 3rd pairs to switch to. I do not like to switch from strike ball to spare ball durring a game only on ball changes so I like pairs. That, also, gives me a back-up slug just in case of problems.

~ John

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#151180 - 05/06/11 05:43 AM Re: Making Molded Thumb in Turbo Switch grips [Re: ijohn83]
10PinGaloot Offline
Legend

Registered: 05/19/09
Posts: 2094
A/S/L: 65/m/ Woodburn, OR
Awesome. You deserve today's good citizenship award.
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#151214 - 05/07/11 09:00 AM Re: Making Molded Thumb in Turbo Switch grips [Re: ijohn83]
CoachJim Offline
USBC Silver Coach

Registered: 09/19/06
Posts: 4665
A/S/L: Reston, Virginia USA
You guys did a great job on this, does your daughter bowl?

Can you make a cast of your thumb and make a mold from that? Then all you would need to do is work it out with a drum sander when your thumb expands or swells. This would prevent bending of the thumb in the hole and give you an exact fit to your thumb.

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#151223 - 05/07/11 07:32 PM Re: Making Molded Thumb in Turbo Switch grips [Re: CoachJim]
ijohn83 Offline
4x Virtual League Champion

Registered: 10/13/07
Posts: 950
A/S/L: 54/male/Palmdale, California U...
Originally Posted By: CoachJim
You guys did a great job on this, does your daughter bowl?

Can you make a cast of your thumb and make a mold from that? Then all you would need to do is work it out with a drum sander when your thumb expands or swells. This would prevent bending of the thumb in the hole and give you an exact fit to your thumb.


Candice does not bowl. But we had so much fun acting like she knew what she was talking about.
I did not just cast my thumb (yet). I have too much time and money invested in getting the perfect pitches that I wanted to make sure that they were right. At a later date I will cast my thumb without the line-up slug to compare the two.

~John

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#151238 - 05/08/11 02:20 PM Re: Making Molded Thumb in Turbo Switch grips [Re: ijohn83]
CoachJim Offline
USBC Silver Coach

Registered: 09/19/06
Posts: 4665
A/S/L: Reston, Virginia USA
Quote:

Candice does not bowl. But we had so much fun acting like she knew what she was talking about.


Wow! I was going to recommend people see her for fitting/lessons smile

When you get your pitches the way you want, take the tape out of the hole, put a latex glove on your thumb, put your thumb in the properly pitched thumb sleeve and keep your thumb pressed to the front of the hole and make the mold around it, this will keep the pitches the way you have them. If the molding compound gets between the front of your thumb and the sleeve then it will alter your pitch away from where you want it.

One other thing to take into consideration is you might have to back off on the forward pitch once you have a hole that is perfectly molded to your thumb. You will have to try it and see for yourself.

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