My experience here is that if the pro shop does their job correctly then the chance of having a bowling ball crack is minimal. When I talk about cracking I am talking about creating a major crack in the ball, not just a hairline around the fingers or thumb.
Since I started bowling in 1990 I have had exactly 189 bowling balls. Most were new but many were used. I have NEVER....yes I said NEVER had a ball crack on me.
Brands I have thrown include: Lane 1, Track, Storm, RotoGrip, Hammer, Columbia, Ebonite, AMF, 900 Global, Dynothane, Visionary, MoRich and Brunswick.
I have always kept my equipment clean, have not ever baked the balls (either at home or in a pro shop Rejuvenator) and have kept them in a heated area.
I have had customers bring balls in that cracked. What I have found with these balls is that each and every ball had a thumb slug in them. I feel that when slugs are installed in a hole and needs to be hammered in, you are in trouble and MAY create problems.
That's just my 2 cents but I think it's one of the main causes.
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Doug Sterner
Doug's Pro Shop
Owego, NY
http://dougsproshop@aol.com
www.dougsproshop.net
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