There are any number of purported reasons, few of which are verifed as true causes.
Some people recently presented some novel and not really well understood reasons:
- resting on one spot on its bottom for too long (assuming a solution would be to rotate it to prevent this)
- keeping the ball inside its original plastic sleeve (assuming this might prevent changes in humidity from affecting the ball.)
Personally I am unhappy that the 900Global manufacturing process chooses to make the thinnest resin shells I have ever seen, often in the range of 3/8" in thickness. Please keep in mind that I have no qualms or concerns about the performance of all ball made in this plant in San Antonio (900Global, AMF, Lane#1, Jet, Seismic and possibly one or 2 others I am forgetting). Also, I don't know that this thinness has anything to do with the cracking.
The only balls I have ever had crack were 2 older Track balls, one Breakpoint, and more recently, a Radical Times Up (that was replaced due to the efforts of Steve (tekneek)). All were produced in that San Antonio plant. No other brand has ever cracked while just sitting there in my basement. This includes NIB balls, drilled balls sitting in their plastic bag in a box sitting on a wooden shelf, balls sitting out in the open on a rug on my basement floor and a few NIB sitting in the box on the floor. Some old gems have been sitting there for years. My driller always bevels all holes, uses minimal Super glue, alway suses sharp drill bits and always drills slowly, using minimum 1/4" bridge between holes.
So why some crack and others don't seems to be almost a crap shoot.
Oh that's another concern: the heat and humidity in San Antonio, TX, a few miles north of the Mexican border seems to have some unknown affect on the curing of the resin shell. This has been a concern since before the time when Ebonite bought all the resources of the original Columbia300 corporation.
"None are so blind as those who will not see."
Edited by charlest on 12/14/2011 at 3:03 PM