BallReviews
General Category => Drilling & Layouts => Topic started by: agroves on March 22, 2009, 10:34:18 AM
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I drill for a guy with the flattest thumb I've ever seen. The "skinny" portion of his thumb is about a 29/32 and the "wide" part is 1 1/32. We've been using the Vise pre-oval slugs and he wants to go back to a regular slug.
In the past, I've drilled the pilot oval and opened up by hand. I'd like to try drilling an oval, but the jig at the shop I work at is just a basic jig.
Does anybody have tricks to drilling ovals with this type of jig???
Thanks.
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If you really want to try it on a basic jig you will have to drill into the ball VERY slowly and take out the material in steps to avoid excessive vibration and bit travel (assuming you have spade bits). If you are lucky enough to have end-mills then you shouldn't have too many issues...but still go slowly.
Honestly you best bet might just be to make one by hand and then mold it.
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-Chris: DJ's Pro Shop : Auburn, MA
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Hopefully your bit is very sharp and definetly go in steps. Around .030" increments.
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"USBC is concerned that technology has overtaken player skill in determining success in the sport of bowling"
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Drill it using your 1 1/32 bit and then give him Ron C's Magic Carpet for the back of his thumbhole and white thumbhole tape covered with Valentino's Frankentape for the front.
A whole lot simpler for you, and a better fit for him.
Edited on 3/23/2009 9:56 AM
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BTW, we don't have digital read outs.....
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quote:
BTW, we don't have digital read outs.....
Then read the scale on the table cranks, each division is .001"
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"USBC is concerned that technology has overtaken player skill in determining success in the sport of bowling"