Miter gears are 1 type of bevel gears where in fact the two rotational axes intersect. When talking about narrow description of bevel gears with capability to increase or lower speed, miter gears do not have that ability due to the pair’s same quantity of teeth. Their purpose is bound to the switch in transmission path. Because they are a kind of bevel gears, the essential characteristic of bevel gears can be found such as presence of gear types of straight cut, spiral cut and types.
Also, since the shafts can be set to any angle, presently there are miter gears with non-90 degree (non-perpendicular) angle miter gear china called angular miter gears. Ever-power is certainly capable of generating angular miter gears with shaft angles in the number of 45 to 120 degrees.
Because a pair of straight tooth miter gears has the same number of teeth, apart from small differences such as place screw holes and key methods, the same two gears can mate with each other. However, regarding spiral miter gears, even when the number of teeth will be the same, the twisting directions are different. Therefore, the same gear cannot be meshed together, in fact it is required to pair the right and remaining handed 
pairs.
Bevel gears are classified in different types according to geometry:
Direct bevel gears have conical pitch surface area and teeth are straight and tapering towards apex.