Herringbone gears are a special type of helical gears. They do not have a groove in the middle like some other double helical gears do; the two mirrored helical gears are joined so that their teeth form a V shape. This can also be applied to bevel gears, as in the final drive of the Citroën Type A. Another type of double helical gear is a Wüst gear.
herringbone gears are a special type of helical gears they do not have a groove in the middle like some other double helical gears do; the two mirrored helical gears are joined so that their teeth form a v shape this can also be applied to bevel gears as in the final drive of the citroën type a another type of double helical gear is a wüst gear