Before anyone uses any of my stuff I must warn that these are mostly some experimental projects and take the information with a pinch of salt. There may be mistakes and even false information given so always rely on proven information and find yourself a professional PSO to help you with your bowling ball –related problems. If you find some error or problem, please inform me and I will do my best to make corrections to that.
Feel free to use these things in personal or professional matter and I do not mind if some of these are added to the wiki. If you find some of the stuff useful, best way to say thanks is the “+”-mark on bottom right corner of the message
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First I share this finger pitch calculator –program. With this excel-sheet, it should be possible to at least:
- convert normal finger-/thumb -pitches to true pitch and angle so you can use for example only one axis to drill a ball
- convert a true pitch and drilled angle (direction of the pitch) to standard T-grip pitches (reverse calculations)
- convert ADT-pitches to normal T-grip-pitches
- convert 45degree thumb drilling and other “centerline transported”-holes to standard T-grip –pitches
- convert pitch to a degree scale (no pitch=no angle, .500” pitch=6,71 degree angle etc…)
- calculate the starting pitch and angle for oval drilling using only one axis
Edit: I have found that if you are using mobile device (ios/android) to download and use this excel-sheet, it may not make the calculations correctly. It works great in my windows laptop though.