That same feature, nevertheless, can also lead to higher opespiral bevel helical gearbox rating temperatures in comparison to bevel gearbox motors when from the same producer. The increased heat results in lower performance and the parts eventually wearing out.
Bevel gears are also used to transmit power between shafts, but are slightly different than worm gears. In this case, there are two intersecting shafts that can be arranged in different angles, although generally at a 90 level position like worm gearbox systems. They can provide superior efficiency above 90 percent and generates a nice rolling actions and they offer the capability to reverse direction. In addition, it produces less friction or heat than the spur gear. Due to the two shafts, however, they aren’t beneficial in high-torque applications in comparison to worm gearbox motors. Also, they are slightly larger and may not be the right fit when space considerations are a factor and heat is not an issue.
Straight bevel gears are usually found in relatively slow velocity applications (less than 2m/s circumferential speed). They are often not used when it is necessary to transmit large forces. Generally they are used in machine tool tools, printing machines and differentials.
A worm is actually a toothed shaft that drives a toothed wheel. The complete system is named a worm gearbox and it is used to reduce acceleration and/or transmit higher torque while changing direction 90 degrees. Worm gearing is a sliding action where the work pinion pushes or pulls the worm gear into action. That sliding friction creates temperature and lowers the efficiency rating. Worm gears can be used in high-torque situations compared to other options. They certainly are a common option in conveyor systems since the equipment, or toothed wheel, cannot move the worm. This allows the gearbox motor to continue operation regarding torque overload along with emergency stopping regarding a failing in the machine. It also allows worm gearing to 
take care of torque overloads.
Used, the right-hand spiral is mated with the left-hand spiral. As for their applications, they are generally used in automotive rate reducers and machine
Directly bevel gears are divided into two groups: profile shifted Gleason type and non-profile shifted ones called standard type or Klingelnberg type. Total, the Gleason program is presently the most widely used. In addition, the Ever- Company’s adoption of the tooth crowning method called Coniflex gears creates gears that tolerate minor assembly errors or shifting due to load and increases basic safety by eliminating stress concentration on the edges of the teeth.