Oil pump gear

machining:
flank ground and flank honed for use in racing engines
Beveloid wheel /bevelled helical gear

machining:
bevel and oblique toothed
Where axes are 3-dimensionally oblique
Planetary gear sets

Used wherever loads are moved (e. g. in wheelchairs, stair lifts, crane winches)
Coupling part

crown toothed
Non-round gear

machining:
gear tooth forming
Where asymmetric movement is required
Gearwheel

bevelled and crown toothed