Machine head

（重定向自Tuning Machine）

Schaller BM tuning machines on Music Man Bongo 5

The machine heads on a classical guitar. Note the exposed gears and the decorations.

A machine head (also referred to as a tuning machine, tuner, or gear head) is a geared apparatus for tuning stringed musical instruments by adjusting string tension. Machine heads are used on mandolins, guitars, double basses etc., and are usually located on the instrument's headstock. Non-geared tuning devices that are used on violins, violas, cellos, lutes, older Flamenco guitars, ukuleles etc., are known as friction pegs. Friction pegs hold the string in tune by way of friction caused by their tapered shape and by the string pull created by the tight string. Some other commonly used slang names for guitar tuners are pegs, gears, machines, cranks, knobs, tensioners and tighteners.

单词	Tuning Machine
释义	Tuning Machine 英语百科 Machine head （重定向自Tuning Machine） A machine head (also referred to as a tuning machine, tuner, or gear head) is a geared apparatus for tuning stringed musical instruments by adjusting string tension. Machine heads are used on mandolins, guitars, double basses etc., and are usually located on the instrument's headstock. Non-geared tuning devices that are used on violins, violas, cellos, lutes, older Flamenco guitars, ukuleles etc., are known as friction pegs. Friction pegs hold the string in tune by way of friction caused by their tapered shape and by the string pull created by the tight string. Some other commonly used slang names for guitar tuners are pegs, gears, machines, cranks, knobs, tensioners and tighteners.
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