In the world of mechanical power transmission, gear drives have a 
very special and prominent place. This is the many gear chain china preferred technology when you need to transmit considerable power over a short distance with a continuous velocity ratio. The mechanism of equipment drives is pretty simple – the teeth, which are cut on the blanks of the apparatus wheel, mesh with each other to transmit power. In order to avoid slipping, the projections on one disc mesh with the recesses on additional disc in gear drives.
This technology uses different types of gears for power transmission. In fact, it could transmit power not only between parallel shafts, but also between nonparallel, co-planar, and intersecting etc. shafts.