Transmission boxes are also known as gearbox which is the second part of the power in vehicles. Actually its primary purpose is to adjust the speed and torque of vehicle according to the variety of highway and cargo condition. Gear system helps to change the speed of the vehicle into torque as it ascends to the hills, which are very import to the cars to. At times it is identified as torque converter. In auto industry, there are many types of transmission boxes. They include the following, Spur gearboxes, helical gearboxes, bevel gearboxes, spiral gearboxes, hypoid gearboxes among others. Spur gearboxes are the mainly ordinary and straightforward transmission boxes available. The order in which their radial teeth are situated enables them to handle high gear ratios thus giving exceedingly high level of helpfulness. Spur gearboxes have their demerits also. They normally be likely to come up with a lot of pressure and sound, and that’s why they are often desirable used for low-impact and low-speed works where loud noise is acceptable. Bevel transmission boxes are made up of bridge rods and cone-style that support versatile movement in the area directly linking these shafts. They are competent of managing pressure due to the care used to fit feature axes in them. Bevel gearboxes have lower productivity levels than helical and spur gear systems. The bevel gearboxes do work correctly with lesser gear ratios, perhaps even more efficient than their helical counterpart. Helical transmission boxes do look like spur gears although their teeth are not placed in a crossway order in the revolving axis. However, these gears are locked at an angle, most commonly right angle. They have little load capability due to the similar pose of their teeth. Helical gear teeth positioning permits for self-effacing engagement thus guarantee a work that is considerably softer than that of spur gear systems.
The loading directions of helical transmission boxes allow them to work with advanced torques, even if their effectiveness ranges are similar. These kinds of gearboxes have their weaknesses as well, in fact, the level of medial thrust they are using, that demands the use of sufficiently oiled shaft bearings. Spiral transmission boxes are adjustment of bevel gear system, and they give benefits equal to helical gearbox systems with teeth that join bit by bit. The engagement of gear system bit by bit in spiral gear systems has caused a reduction of noise and smoothness in the system shafts. Thus the efficiency standards in spiral gear systems is very high. Hypoid transmission boxes look like spiral bevel kind, but their drive shafts only do not touch. They work fine with right angle compel shaft, they produce minimum sound, and they are powerful than spiral bevel gear systems. High speed ratio can be managed with this system.