The principle of machine milking is to extract milk from the cow .
The machines are designed to apply a constant vacuum to the end of teat to suck the milk out and convey it to a suitable container, and to give a periodic squeeze applied externally to the whole of the teat to maintain circulation.
Advantages of milking machine: 1) Reduction of dependency on skilled farm workers.
2) Enables rearing of larger of herd strength.
3) 3-4 times faster than hand milking.
4) Increase in the quality of milk.
5) Reduces stress throughout the location by creating good milking routines.