Correct angle gearboxes are characterized by the actual fact that the drive shaft and the result shaft are arranged at an angle of 90 degrees. Depending on the gearbox type, the axes can intersect in a plane or cross on two parallel planes, which results in an axis offset.
Correct angle gearboxes are recognized with various kinds of gear teeth or a mixture of different gearing types. The most popular single-stage gearbox types are bevel and worm.
Due to the high single stage ratios and the low performance level, worm gears can achieve a self-locking effect. With worm gears it is also possible to get a hollow shaft as the drive shaft.
Bevel gearboxes come with various kinds of gearing. Bevel gearboxes with intersecting axes are noticed using bevel gearing with straight, helical or spiral tooth. Hypoid gearboxes possess helical bevel gearing with which the axes cross with an axis offset. The bandwidth of technically practical ratios with which the bevel gear stage could be realized is larger with hypoid gearboxes than with the classical bevel gear teeth.
Bevel gearboxes may also be combined with other gearbox types. A frequent software in this respect is the combination with a planetary gearbox, whereby the planetary gearbox can be connected 
upstream or downstream. This outcomes in a wide variety of overall multiplication elements and wide selection of uses in many industrial applications.
The efficiency level of bevel gearboxes is typically less than that of coaxial spur gearboxes, particularly in comparison to planetary gearboxes. That is because the bevel equipment stage generates a higher degree of axial pressure and radial pressure, which needs to be absorbed by suitable bearings. This escalates the power loss, which is particularly notable in the drive stage of the gearbox.
The running noise and the transmittable torques of classic bevel gearboxes are also lower than with single spur gear teeth. Hypoid gearboxes, however, are extremely noisy and can transmit huge amounts of torque, but a considerable amount of bearing load occurs in the bevel gear stage of these gearboxes.
In summarizing, a right angle gearbox is always used when the quantity of installation space in the application is bound, or an angular arrangement between your drive and the output is required by the application. They are also used in instances where the input shaft needs to be hollow in order to business lead through lines or use clamping sets.