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Scale diagram of bowling pins and balls for several variants of the sport. The horizontal blue lines are 1 inch (2.5 cm) apart vertically. Bowling pins (historically also known as skittles or kegels) are upright elongated solids of rotation with a flat base for setting, usually made of wood (esp. maple) standing between 9 and 16 inches (23 and 41cm) tall.
Behind the ball: A position of the hand on the ball, furthest or nearly furthest from the pins and away from the side, generally thought to impart a modest but controllable amount of side rotation to modern reactive resin bowling balls. Designed to avoid a chicken wing delivery. [26] [27]
A 5-pin bowling pinsetter in use at a bowling alley in Toronto Pinsetters in operation at a bowling alley as seen from behind the lanes. In bowling, a pinsetter or pinspotter is an automated mechanical device that sets bowling pins back in their original positions, returns bowling balls to the front of the alley, and clears fallen pins on the pin deck.
American nine-pin bowling uses the same ball (and pins) as in ten-pin bowling. [citation needed] European nine-pin bowling balls (such as those used in German kegel) are smaller, sized between ten-pin and duckpin balls, and have no holes. [citation needed] The ball is 16 cm (6.3 in) in diameter and weighs approximately 2.85 kg (6.3 lb).
A conventional roll of the bowling ball will enter the 1-3 pocket, and continue to roll from right-to-left (right-hander.) The ball only contacts four pins (1, 3, 5 and 9 pins) to achieve a strike. This type of roll/hit applies to strokers, power strokers and crankers. A conventional bowling form is the most commonly used method in 10-pin bowling.
Jason Day hits out of a green-side bunker on the 8th hole during the first round of the U.S. Open at Los Angeles Country Club. Pin placement green approaches.
The pin plate can be made from hard-surfaced metal, phenolic, high density plastic, or a synthetic material. Behind the pin plate area is a well-depressed "pit" area for the felled pins and balls to fall into. A heavy rubber backstop, faced with a black curtain, catches the flying pins and balls so they drop into the pit.
A ten-pin bowling score sheet showing how a strike is scored The number of sanctioned perfect (300) games per league bowler has increased substantially since the 1990s. . Freeman and Hatfield posit that the increase in perfect games is due to factors such as the introduction of reactive resin coverstocks, asymmetric ball cores, synthetic lane surfaces, and precision lane oiling mach