Tenpin Bowling Balls

In the 1960s, hard rubber balls were used for bowling. Polyester balls took over as the ball of choice in the '70s. You will find that most of the 'house balls' in your local tenpin bowling alley are made of the polyester. In the '80s the urethane ball was developed, which then were further developed to reactive and proactive urethane. It is not a simple process to create a ball suitable for bowling, there are a lot of regulations that need to be adhered to. Here are the current bowling ball regulations.

Bowling Ball Material Regulations

A bowling ball shall be constructed without voids in its interior, be of a non-metallic composition material and conform to the specifications for weight, size and balance. The use of minute reflective particles or flakes for decorative purposes shall be permitted in bowling ball material provided such flakes or particles are made part of the ball at the time of manufacture, are evenly distributed in a uniform pattern under a transparent shell at least 1/4" beneath the surface of the ball so as to have no effect on the balance, and the total amount of such material does not exceed 1/2 ounce per ball. Also, the surface hardness shall not be less than 72 Durometers "D."

Bowling Ball Weight, Size, Markings & Holes

Other Requirements

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