The pin marks the top of the core inside the bowling ball.
Bowling ball pin down drilling.
Pin down layouts give you a slower more controllable overall ball reaction.
Not to be confused with the pins at the end of the lane every bowling ball is marked with a colored dot which represents the ball s pin.
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.
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.
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.
Pin down drilling layouts allow you to stay in the same area because the ball reaction is not as aggressive.
When the pin placement is lowered it is to achieve an arc shape.
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.
Testing one symmetric ball with one pin distance isn t all that conclusive.
That said it s an awfully simplistic study.
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.
On an asymmetrical ball the mass bias should be in line with the pin and directly underneath your thumb.
When you drilled a ball pin down it would generally have more thumb weight.
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.
Hole size matters as well as a consistent feel.
The layout when the ball is drilled put the pin 4 5 inches from your positive axis point pap or under your ring finger.
What is the pin.
This caused the ball to get down the lane a bit further.
I ve had much better luck getting different reactions out of balls using high low flare drilling s or by using weight holes.
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.
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.
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.
When drilling a ball pin up it would generally have more finger weight.
When you use this type of arc motion you will want to see the ball make a move sooner on the lane.
