They are somewhat analogous to cylindrical type helical gears in that the teeth are angled; however, with spiral gears the teeth are also curved.
42.
Like helical gears, they have the advantage of transferring power smoothly because more than two teeth will be in mesh at any moment in time.
43.
Double helical gears overcome the problem of axial thrust presented by single helical gears by using two sets of teeth that are set in a V shape.
44.
Double helical gears overcome the problem of axial thrust presented by single helical gears by using two sets of teeth that are set in a V shape.
45.
A right hand helical gear or right hand worm is one in which the teeth twist clockwise as they recede from an observer looking along the axis.
46.
A left hand helical gear or left hand worm is one in which the teeth twist anticlockwise as they recede from an observer looking along the axis.
47.
Helical gears can be used to mesh two shafts that are not parallel and can also be used in a crossed gear mesh connecting two perpendicular shafts.
48.
Double helical gears and herringbone gears are similar but the difference is that herringbone gears do not have a groove in the middle like double helical gears do.
49.
Double helical gears and herringbone gears are similar but the difference is that herringbone gears do not have a groove in the middle like double helical gears do.
50.
The cars should also have included a Torsen, helical gear style limited slip differential which would have been delivered not installed in the trunk of the car.
