plugging a ball and getting it re-drill what effect does it do to the ball

Bowling This Month magazine had a whole article about this subject:

The Effect of Plugging and Redrilling on Bowling Ball Mass Properties by Bill Sempsrott

They basically found (using a special version of the Blueprint software to do computer simulations) that plugging and redrilling only caused very minor and largely insignificant differences in the mass properties and the on-lane motion of the balls.

The basic conclusion presented was quote:

"in most cases, bowlers and pro shop operators really shouldn’t be too concerned with how they may be affecting the mass properties of their bowling balls when they plug and redrill them."

I would have to say think that its a little more significant, especially if the layout is hitting the core. You are in effect changing the mass properties, PSA, and differential of a ball when you drill it. Plugging it only puts mass back into the ball, however it cannot be placed back into the original positions of the core shape. I would like to see the article to read what it has to say about that.

Per the article cited above, it does not have an significant effect.  It's a good read and the testing done was quite thorough.

The link to the article is pasted below.  I'm not sure if it is subscriber protected.

https://www.bowlingthismonth.com/bowling-tips/the-effect-of-plugging-and-redrilling-on-bowling-ball-mass-properties/

As long as the new drill does not cause the bowlers track to go over any plugged holes the effect is minimal.

This is a good point.  When it comes to used balls, I'm much more concerned with the condition of the coverstock and how the ball will track on the plugs than I am on dynamics of the plugged ball..

Thanks for the information

Assuming you plug all gripping holes, the original owner used the same hand, and it is a symmetrical cored ball you can rotate the grip 180 degrees and use the other side of the ball that has not been rolled on. So essentially you can get a new ball.

Some weights and pin positions make this tougher.

Snakster, same here. Being a low track bowler most of my layouts look like they are for a lefty anyway. Very few have the Pin and or CG right of the centerline.

Quote from: Rightycomplex on December 07, 2016, 04:10:03 AM

I would have to say think that its a little more significant, especially if the layout is hitting the core. You are in effect changing the mass properties, PSA, and differential of a ball when you drill it. Plugging it only puts mass back into the ball, however it cannot be placed back into the original positions of the core shape. I would like to see the article to read what it has to say about that.

Quit talking all that sense, bro!

LOL! My fault, forgot where I was.... oh well, just sharing what I've learned from people who design balls... What do those idiots know?