Why is a Reduction Gear Used?
To understand why a reduction gear is used in a particular machinery we will take an example of a ship using high speed turbines. It is a basic requirement of a ship that in order to have high efficiency the steam turbine should operate at a relatively high range of rpm. However, the effective functioning of a propeller requires a relatively low rpm range. For this reason, a reduction gear is used, which reduces the high speed motion of the steam turbine into low rpm range required by the propeller.
