Lastly, you should consider the type of gear reducer assembly is best suited for the application. The input and output shafts of your gear reducer could be coaxial, parallel-shaft or orthogonal. This depends upon your intended use.
The other reason for a gear reducer is to reduce the motor speed and we advise that you take into account the ideal reduction ratio for your use. Predicated on the rotational acceleration of your engine, the reduction ratio is used to look for the output rotational swiftness. This information is also indicated by producers on their product pages. It 
is given in revolutions per minute.
It is therefore appropriate to consider about the torque initial and foremost. A reducer increases the torque of your electric motor and therefore allows a getting member to rotate under the impact of a fresh torque. Gear reducer manufacturers sometimes indicate the minimum and maximum torque (expressed in newton meters, N.m) which can be supported by each of their products. The torque density varies based on the gear reducer. For instance, planetary gearboxes have a high torque density.
A gear reducer can be used to adapt the features (torque and acceleration) of the insight and output axis of a mechanism. This is why you have to know the torque and rotation acceleration.
Before buying a gear reducer, it’s important to take several factors into account.
Have you or participants of your household considered center gearbox?