Layout Visualizer

Put in your specs and see a 3D model of your drilled bowling ball

Bowler specs (convert fractions to decimals)

What is your PAP (positive axis point)?*

in × in

(*Positive number means a point above the center line, negative means below)

Which hand do you bowl with?

Do you use a thumb hole?

What is your middle finger span?**

What is your ring finger span?**

(**Use cut-to-cut spans, i.e. the distance between the edges of holes without inserts, slugs, interchangeable devices, etc.)

What is your bridge (the distance between the two finger holes)?

What is the size of your middle finger hole?†

What is the size of your ring finger hole?†

(†The outer diameter of a standard finger insert is 31/32", or 0.9687", though larger sizes exist.)

What is the size of your thumb hole?‡

(‡Thumb slugs usually range from 1 1/8" to 1 1/2" in diameter; for the average bowler, 1 1/4" is the most common size.)

Layout

Does your ball have an asymmetrical weight block?

What is your desired drilling angle?

deg

What is your desired pin to PAP distance?

What is your desired VAL angle?

deg

This program is not meant to be instructional and there are no guarantees to its accuracy. Do not use this as a drilling guide. Consult your local pro shop to find the best layout and fit for you.

Currently, only the dual-angle layout method is supported. In the future, I may look into implementing other measurement systems, e.g. VLS/2LS.

To learn more, visit these pages:

Source code: https://github.com/g1derekl/layout-visualizer