Belt-drive Turntable
There are two main types of phonograph turntable drives still being manufactured today, the belt-drive and direct-drive systems; the names are based upon the type of motor system found in each.
In a belt-drive turntable the motor is located off-center from the platter, either underneath it or entirely outside of it, and is connected to the platter or counter-platter by an elastomeric belt.
The design of the belt-drive turntable allows the use of a less expensive motor than the direct-drive turntable. Also, the elastomeric belt absorbs motor vibrations which would otherwise be picked up by the stylus.
Read more about Belt-drive Turntable: Rotational Stability, Belt-drive Types, Disadvantages