As I responded there, I have drilled a ton of track balls in the last year and a half for my customers, and not including the better part of 20 some for myself, and not a single one of my own has cracked and none of my customers have brought any back complaining either. I would have to say it deals with the bowler stroing it in extreme temperatures (hot then cold, vice versa), or the driller is using dull bits or even drilling the ball too fast. When I worked in another pro shop a few years back, my former boss was known for drilling fast, and I watched him 2 or 3 times crack a ball right in from of me from drilling so fast. The faster you go, the more heat the ball takes and sometimes it is just too much and it cracks. I obviously have not seen any of their bowling balls or watched them being drilled, but I would lean that way. Just hard for me to believe if there is truly a problem and with all of the balls I have gone through for me to NEVER receive one with the problem.

Clint
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Clint Daley-Owner
Lets Go Bowling Daley
Salem, Ohio 44460
TRACK ADVISORY PRO SHOP STAFF

I have drilled MANY Track balls for myself....and quite a few for customers and I have not had this problem. I feel one of the strongest things about Track as a company is that the quality control dept does their job.

Also, as Clint states there are many different things that can cause problems with a bowling ball....extreme temperatures, extreme temperature changes, the pro shop operator drilling too fast.....AND lets not forget the pro shop operator not beveling the holes enough before installing finger grips.

-EX-
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C-G Pro Shop (owner/operator)
Youngstown Ohio

Track Intl.-Advisory Staff

i had my weight hole in my velocity do this as well, and storm is seemingly notorious for this in the Charge lines.
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Timothy @Juniors Pro-Shop
Montreal, Quebec.