In the world of mechanical power transmission, gear drives employ a special and prominent place. This is the many preferred technology when you need to transmit substantial power over a brief distance with a constant velocity ratio. The system of gear drives is fairly gear chain china simple – the teeth, which are cut on the blanks of the apparatus wheel, mesh with one another to transmit power. In order to avoid slipping, the 
projections on one disc mesh with the recesses on various other disc in gear drives.
This technology uses various kinds of gears for power transmission. In fact, it can transmit power not only between parallel shafts, but also between nonparallel, co-planar, and intersecting etc. shafts.