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Your Bowling Ball Positive Axis Point
The point on the pocket side of your bowling ball at the end of the axis of rotation while your ball is in motion is referred to as your bowling ball positive axis point.
When your bowling ball is delivered, the ball will revolve around an axis known as the axis of rotation. At the ends of the axis of rotation are the PAP and the NAP (negative axis point). The PAP is the one point most important in deciding on a drilling layout and ultimately in achieving a desired ball motion.
Every bowler has their own release technique so the PAP is different for each bowler. Your PAP is unique to your delivery style. Your pro shop professional can help you pinpoint your PAP by examining one of your existing bowling balls when planning a drilling layout for your next new bowling ball.
The motion of your bowling ball is based on how far the Pin and the mass bias (MB) are from the PAP. The Pin and MB in relation to the PAP will help determine the amount of track flare your ball promotes as it travels down the lane.
When you deliver your bowling ball, you will notice the oil on the ball comes back with rings and each one of these rings indicates how many times the ball makes fresh contact with the lane surface. The Pin location with respect to the differential of the core rating determines how much your bowling ball will flare.
Maximum flare will produce the sharpest angle of entry when your ball reaches the break point and as it travels to the pocket.
Maximum track flare is achieved by placing the Pin 3-4 inches from the PAP on the surface of your bowling ball.
Minimum flare results in a minimum angle of entry from the break point to the pocket and is achieved when your Pin is located either about 1 inch or 6 inches from your PAP.
The distance the pin is from the PAP will also determine how quickly your ball will rev-up upon delivery. If the MB is closer to the PAP, the ball will rev-up sooner than if the MB is farther away from the PAP.
It is important to note that a high rev player with a good deal of axis tilt created by the player's delivery will not see the same overall ball motion as a low rev player with less axis tilt, if both players use the same layout pattern. Because there are so many styles in bowling with so many types of releases, drilling a new ball with reference to your PAP is crucial in achieving the ball motion you seek.
Most pro shop operators can measure your PAP in a matter of just a few minutes. Combining your PAP location and knowing where the Pin and MB markers are located on the ball surface will help the pro shop operator determine a proper layout that will get you the ball reaction that best matches the lane conditions you encounter.
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