Miter gears are 1 kind of bevel gears where the two rotational axes intersect. When speaking of narrow definition of bevel gears with ability to increase or lower speed, miter gears do not have that ability due to the pair’s same quantity of tooth. Their purpose is limited to the switch in transmission path. Because they are a kind of bevel gears, the essential characteristic of bevel gears exist such as presence of gear forms of straight cut, spiral cut and types.
Also, because the shafts could be set to any angle, now there are miter gears 
with non-90 degree (non-perpendicular) angle called angular miter gears. Ever-power is usually capable of producing angular miter gears with shaft angles in the range of 45 to 120 degrees.
Because a pair of straight tooth miter gears has the same amount of teeth, apart from small miter gear china differences such as place screw holes and key methods, the same two gears may mate with one another. However, regarding spiral miter gears, even when the number of teeth are the same, the twisting directions will vary. Therefore, the same equipment can’t be meshed together, in fact it is necessary to pair the proper and remaining handed pairs.
Bevel gears are classified in different types according to geometry:
Straight bevel gears have conical pitch surface and teeth are straight and tapering towards apex.