Ebonite - How to Make a Bowling Ball

A couple of guys visit the Ebonite factory in Kentucky. They show you how a bowling ball is made - from the core to fitting/drilling. It is quite fascinating if you consider the mechanics and physics behind today's bowling balls. It is all about fighting the lane conditions, and maximizing power when the ball hits the pocket. There are at least two other uploads of this same video. This one is of the best quality.