Bowling ball drilling

A method for drilling holes in a bowling ball, the holes having a predetermined pitch, the drilling method comprising the steps of:

• providing a frame for receiving a bowling ball;
• rigidly affixing the bowling ball within the frame;
• exposing a substantial portion of the ball for drilling finger and thumb holes;
• selecting a bit sized for drilling a hole having a predetermined dimension;
• placing the bit in a chuck affixed proximate the frame for drilling the bowling ball;
• selecting a reference point on the surface of the bowling ball;
• aligning the axis of the bit with the reference point, wherein a line extending through the axis passes through the ball center;
• rotating the frame through a first arc about a first axis, an extension of the first axis passing through the ball center;
• rotating the frame through a second arc about a second axis, an extension of the second axis passing through the ball center, the rotating through the first and second arcs for positioning the bit in an orientation parallel to a hole to be drilled;
• displacing the frame a predetermined distance for positioning the bit for providing a hole having a desired lateral pitch;
• displacing the frame a predetermined second distance for positioning the bit for providing a desired vertical pitch;
• and
• drilling a hole in the ball, the axis orientation of the hole resulting from the ball rotating and displacing steps for providing desired lateral pitch and vertical pitch.