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The USBC and World Bowling promulgate bowling ball specifications. USBC specifications include physical requirements for weight (≤16 pounds (7.3 kg)), diameter (8.500 inches (21.59 cm)—8.595 inches (21.83 cm)), surface hardness, surface roughness, hole drilling limitations (example: a single balance hole including the thumb hole for "two-handed" bowlers [3]), balance, plug limitations, and ...
Easton Sports, Inc. originated in the archery company Jas. D. Easton, Inc., which was founded in 1953 by James Douglas "Doug" Easton (1907–1972). In 1922, while recuperating from a shotgun accident, Easton read the book Hunting with the Bow and Arrow by Saxton Pope , and soon began making bows and arrows.
In 1981, they created the second urethane ball in the market, and Hammer was born. Hammer was the first to put a logo on the side of the ball. After a PBA player was featured in a tournament telecast using the ball with its visible claw hammer logo, sales exploded. The Hammer brand was also the first to produce a urethane two-piece ball.
Ebonite International was a parent company that oversaw the manufacture of bowling balls [1] and bowling equipment. Their headquarters and primary manufacturing facility was located in Hopkinsville, Kentucky before closing on November 15, 2019.
See Bowling ball#Layout and grip and Bowling ball#Effect of coverstock, core and layout on ball motion. Layout is also a term referring to the oil pattern used on a lane surface. League: An organized group of bowling teams that compete against each other according to rules and a schedule. Leagues may be certified by a national governing body.
Bowling balls vary, depending on the type of bowling. Ten-pin balls are about 8.59 inches (21.8 cm) in diameter, typically have three holes, and weigh from 6 to 16 lb (2.7 to 7.3 kg). The size and spacing of the finger holes on non-customized balls are generally smaller on lighter balls to accommodate smaller hands.