This reduces the peak impulse load intensity on the sprocket tooth thereby resulting in reducing the wear and damage on the tooth, which in turn increases sprocket life.

A gear shot peening method for hardening a gear without forming any projection on a tooth tip portion of the gear and a gear without any projection obtained through the method.

The tooth (23a) of the rack to contact at first with the tooth of the pinion gear when engaging with the pinion gear (32) is lower at its crest than the other teeth of the rack.

The external diameter of the bushing wears in the sprocket tooth curvature when it is powered.

An electrical machine, in particular a starter for an internal combustion engine, has a pinion that is axially displaceable on a drive shaft, wherein at least one tooth of the pinion can slide axially and is subjected to the force of a spring element.

Each arm has on the end thereof, a tooth for meshing with a tooth on the second gear to allow transfer of force between the first gear's tooth and the meshing second gear's tooth.

Formed in the pinion inner (71) are pinion inner-side helical external teeth (73) that mesh with the pinion-side helical internal teeth (74a).

Formed in a pinion (74) are pinion-side helical external teeth (74A) that mesh with a ring gear (23), and pinion-side helical internal teeth (74a) that mesh with a pinion inner (71).

This reduces the peak impulse load intensity on the sprocket tooth thereby resulting in reducing the wear and damage on the tooth, which in turn increases sprocket life.

A gear shot peening method for hardening a gear without forming any projection on a tooth tip portion of the gear and a gear without any projection obtained through the method.

In some embodiments, the cushion ring has a randomized contour to provide predetermined cushioning that varies from tooth to tooth around the sprocket.

One housing (78) sprocket segments (28) overlap the adjacent housing (78a) sprocket segments (28a) to form a single tooth (38a).

Drive gear bearing mounting recesses receive the drive gear bearing races, and driven gear bearing mounting recesses receive the driven gear bearing races.

The tooth (23a) of the rack to contact at first with the tooth of the pinion gear when engaging with the pinion gear (32) is lower at its crest than the other teeth of the rack.

Further, in at least either of the first gear portion (15) and the second gear portion (17), an axial length of at least one gear tooth (15a, 17a) is longer than the axial lengths of the other teeth constituting the respective portion.