In the world of mechanical power transmission, gear drives employ a special and prominent place. This is the most preferred technology when you need to transmit significant power over a short distance with a constant velocity 
ratio. The system of gear drives is fairly simple – one’s 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 gear chain china recesses on additional disc in equipment drives.
This technology uses various kinds of gears for power transmission. Actually, it could transmit power not only between parallel shafts, but also between nonparallel, co-planar, and intersecting etc. shafts.