In the world of mechanical power transmission, gear drives have a very special and prominent place. This is the many preferred technology if you want to transmit substantial power over a short distance with a continuous velocity ratio. The system of equipment drives is quite 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 other disc in gear drives.
This technology uses various kinds of gears for power transmission. In fact, it could transmit power not only between parallel gear chain china shafts, but also between nonparallel, co-planar, and intersecting etc. shafts.