BallReviews
General Category => Drilling & Layouts => Topic started by: Jish on September 27, 2006, 09:30:45 PM
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Picked up a used drill a little while back and still learning to drill balls and had a quick question. Say you have a thumb pitch to drill in a ball thats 3/8 reverse and you are using a thumb slug, do you drill the hole for the slug with a 3/8 reverse also? Thanks.
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Yes, because if you drill the slug at 0 pitch and then you drill the thumb hole at 3/8ths reverse, you will probably go through the back of the slug and defeat the purpose. Thats it.
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Normally I completely agree with Storm4ever. But there can be cases where I don't use this procedure. For example, if I have a customer that wants to experiment with various pitches with 3/8 reverse being the starting point and moving forward from there. First, I would use a 1 3/8" diameter slug. Then I would pitch the hole for the slug at 3/16 reverse. That would allow me to vary the pitches from 3/8 reverse to 0 without cutting through the side of the slug (unless he has an extremely large thumb hole). -- JohnP
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> For example, if I have a customer that wants to experiment with various pitches
But don't you also have to vary the span when varying the pitch?
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slug and hole same pitch
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quote:
But don't you also have to vary the span when varying the pitch?
Depends on how much the pitch is changed. When a customer wants to try pitch changes and do it as inexpensively as possible I use the procedure I described and wait until we're done experimenting to change the spans, if required. -- JohnP