Apparatus for drilling variable size holes in bowling ball

Apparatus for drilling holes of a preselect variable size in a bowling ball comprising:

• means for supporting a ball in a select position;
• a boring apparatus mounted proximate the supporting means for reciprocation in a path intersecting a supported ball;
• means for moving said boring apparatus in said path;
• said boring apparatus having an output shaft rotational about a fixed axis, wherein said output shaft comprises a hollow shaft receiving an adjustment rod, the adjustment rod including an offset cam operatively engaging the drill chuck whereby rotation of the adjustment rod relative to the output shaft slidably moves the chuck relative to the base to produce the offset;
• a boring tool;
• an adjustable boring head connected to the output shaft for rotation therewith, said boring head comprising a base fixedly connected to said shaft and including a slot generally perpendicular to the fixed axis and a drill chuck having a tail slidably received in the slot to produce the offset, said boring head receiving the boring tool and being variably adjusted to offset the boring tool relative to the fixed axis so that the boring tool orbits about the fixed axis to produce a variable size hole in the bowling ball dependent on an amount of the offset;
• and
• means for selectively controlling the amount of the offset.

Apparatus for drilling holes of a select variable size in a bowling ball comprising:

• means for supporting a ball in a select position;
• a boring apparatus mounted proximate the supporting means for reciprocation in a path intersecting a supported ball;
• means for moving said boring apparatus in said path;
• said boring apparatus having an output shaft rotational about a fixed axis;
• a boring tool;
• an adjustable boring head connected to the output shaft for rotation therewith, the boring head receiving the boring tool and being variably adjusted to offset the boring tool relative to the fixed axis so that the boring tool orbits about the fixed axis to produce a variable size hole in the bowling ball dependent on an amount of the offset;
• means for selecting a desired hole diameter;
• and
• a boring head control operable to drill the desired hole size and operable to initially position the boring head to produce a zero offset to drill a pilot hole and subsequently position the boring head to produce a select offset required to drill a hole of the desired hole diameter.