Bowling Ball Pin Down Drilling

In case you are not aware of the term drilling layout it simply means how and where the holes are mapped out for drilling holes into the ball for gripping purposes in relation to the bowling ball locator pin and mass bias marker.

Bowling ball pin down drilling. When the pin placement is lowered it is to achieve an arc shape. Whether drilling pin up or pin down most of the time drilling the finger holes will only have a slight impact on the ball motion. One consideration if you don t have a high rev rate or high ball speed is that you normally want to change to a similar bowling ball with a pin down layout. When you drilled a ball pin down it would generally have more thumb weight.

Testing one symmetric ball with one pin distance isn t all that conclusive. What is the pin. This section details the different types of layouts that exist and the methods. My experience with the balls ive tried pin up pin down on matches the results of that study.

I ve had much better luck getting different reactions out of balls using high low flare drilling s or by using weight holes. Through the progress of bowling ball technology more and more research has been done regarding the placement of the holes in correlation to the pin mass bias marker and other factors that affect your bowling ball s performance. When drilling a ball pin up it would generally have more finger weight. Hole size matters as well as a consistent feel.

Pin down layouts give you a slower more controllable overall ball reaction. This caused the ball to react a bit sooner. The reason the assumption of pin up versus pin down exist is because 7 10 when drilling the ball pin down there is an excess of thumb weight which requires a weight hole in that area moving or strengthening the psa creating more flare which transitions energy faster so you get a smoother look to your reaction. If you use a quicker response layout higher pin the ball tends to make a more sudden move to the friction so you cannot use a break point closer to yourself.

The pin is vital in determining how to drill your ball to get your desired reaction on the lanes. When you use this type of arc motion you will want to see the ball make a move sooner on the lane. That said it s an awfully simplistic study. For most performance core shapes in order to change the ball motion measurably you need at least a 1 drill bit going 2 inches deep.

The pin marks the top of the core inside the bowling ball. This caused the ball to get down the lane a bit further. Pin down drilling layouts allow you to stay in the same area because the ball reaction is not as aggressive. On an asymmetrical ball the mass bias should be in line with the pin and directly underneath your thumb.

On a symmetrical ball the center of gravity cg should be in line with the pin angling toward your thumb. Drilling layouts are an important part of the ball selection process.