herringbone gear , także: chevron gear

This means that herringbone gears can be used in torque gearboxes without requiring a substantial thrust bearing.

Because of this herringbone gears were an important step in the introduction of the steam turbine to marine propulsion.

Herringbone Gears are sometimes referred to as Chevron Gears.

The double helical or herringbone gear balances the thrust caused by normal helical gears.

The latter alignment is the unique defining characteristic of a Wuest type herringbone gear, named after its inventor.

With the older method of fabrication, herringbone gears had a central channel separating the two oppositely-angled courses of teeth.

Precision herringbone gears are more difficult to manufacture than equivalent spur or helical gears and consequently are more expensive.

Amongst South African electric locomotives the Class 14E was the first to have solid wheels using double helical or herringbone gears.

A disadvantage of the herringbone gear is that it cannot be cut by simple gear hobbing machines, as the cutter would run into the other half of the gear.

The logo of the car maker Citroën is a graphic representation of a herringbone gear, reflecting André Citroën's earlier involvement in the manufacture of these gears.

Double helical gears, or herringbone gears, overcome the problem of axial thrust presented by "single" helical gears, by having two sets of teeth that are set in a V shape.

A herringbone gear, also known as a double helical gear, is a special type of gear which is a side to side (not face to face) combination of two helical gears of opposite hands.

In contrast, both the Tiger II and the US M4 Sherman tank had double helical (herringbone gears) in their final drives, a system that reduced internal stress loads and was less complex than planetary geartrains.

The Swiss built Class 14E ran on solid wheels using double helical or herringbone gears, while the locally built Class 14E1 was delivered with the traditional spoked wheels, but using helical gears.

Where the oppositely angled teeth meet in the middle of a herringbone gear, the alignment may be such that tooth tip meets tooth tip, or the alignment may be staggered, so that tooth tip meets tooth trough.