In the world of mechanical power transmission, gear drives employ a special and prominent place. This is the most gear chain china preferred technology if you want to transmit significant power over a short distance with a constant velocity ratio. The mechanism 
of equipment drives is fairly simple – one’s teeth, which are cut on the blanks of the apparatus wheel, mesh with one another to transmit power. To avoid slipping, the projections using one disc mesh with the recesses on various other disc in gear drives.
This technology uses various kinds of gears for power transmission. Actually, it could transmit power not merely between parallel shafts, but also between nonparallel, co-planar, and intersecting etc. shafts.