Velocity reducers are mechanical gadgets that help drive systems maintain optimal quickness and torque for the application. Also referred to as gearboxes and gear drives, they lower the swiftness of rotation of the input shaft by a particular ratio and raise the power transmitted to the result shaft by the same ratio. Ratio multipliers boost the speed reduction and torque given by a acceleration reducer by a certain ratio and are ideal for parallel setups. Installation bases, torque arms, and flange couplings are accessories used with velocity reducers. They are generally utilized in applications where the speed reducer will not be directly attached to the drive mechanism.
Many gearbox designs allow for the electric motor to be directly mounted to the reducer. These styles incorporate either extremely precise flanges to allow the electric motor to be directly plugged into the reducer or other adapters with essential couplings. This eliminates the necessity for separate mounting of the engine, but is normally only practical with smaller sized motors.
Integrating Speed Reducers
After selection, another issue is how the gearbox will be built-into the machine. Check the way the gearbox will be mounted and how it will be linked to the driver and driven load because it may differ from machine to machine.
torque
speed
horsepower
reducer efficiency
service factor
mounting position
connection variable
life required
In some applications the quantity of backlash, transmission error, torsional 
rigidity, and minute of inertia are also important. The quantity of torque needed could very well be the most crucial criteria, as this means the amount of work the acceleration reducer must perform.
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