GMB's Universal Joint
Drive shaft incorporated with universal joint is widely in use not only in automotive industry but also all other industrial scenes. Purpose: high torque transmission in limited space. GMB is specialized in universal joint, key element of module like drive shaft or propeller shaft. GMB is able to meet different requirements and shaft sizes of OEM customers. GMB also covers global aftermarket with wider range line-up and proudly extends our brand name. This service is realized by our thorough in-house production. GMB maintains production and engineering knowledge and experience to produce universal joints of the highest quality viable under all conditions at economical cost.
Power transmitting drive shaft utilising minimum space requirements connects driving shaft to driven shaft at an angle through smooth mechanism of universal joint. Normally a set of 2 universal joints is installed into a shaft. On assembly, it is important to position at①same working angle, ②same plane and ③same phase in order to realize constant velocity.
Basic rule of shaft assembly, constant velocity
- ①same working angle ; A = B
- ②same plane ; driving shaft = center chaft = driven shaft at same plane
- ③Yoke openings (forks) in driving shaft and driven shaft shall face square on straight line.
Universal joint consists of spider(cross) and 4 grease-filled roller bearings. It can transmit large torque at low friction. Spider with journal pegs and bearing cases as outer ring were hot forged or cold formed and machined. They are later carburized in furnace so that increased ruggedness and wear resisitance are obtained. Parts are finally ground to designed size under severe tolerance. Oil seal as well as dust cover are also in use to protect internal journal area from intrusion of foreign material. Variety of grades and materials are selected to repond to extreme conditions such as very hot / very cold temperatures.