Spiral bevel gears with teeth angled are 0° are known as zerol bevel gears. Hypoid bevel gears are analogous to spiral bevel gears but the mating gears do not have intersecting axes. This allows for a ...

If they have spiral teeth, bevel and miter gear sets must have opposite hand specifications to mesh, i.e., a left-hand pinion will drive a right-hand gear and vice versa. Matching items for sets are ...