Velocity reducers are mechanical devices that help drive systems maintain optimal speed and torque for the application. Also called gearboxes and equipment drives, they lower the acceleration of rotation of the insight shaft by a specific ratio and raise the power transmitted to the result shaft by the same ratio. Ratio multipliers increase the speed reduction and torque given by a swiftness reducer by a specific ratio and are suitable for parallel setups. Mounting bases, torque hands, and flange couplings are components used with acceleration reducers. They are generally used in applications where the speed reducer will never be directly mounted on the drive mechanism.
Many gearbox designs enable the motor to be directly mounted to the reducer. These styles incorporate either extremely specific flanges to allow the engine to be directly connected to the reducer or other adapters with essential couplings. This eliminates the need for individual mounting of the electric motor, but is generally only 
practical with smaller sized motors.
Integrating Speed Reducers
After selection, the next issue is how the gearbox will be built-into the machine. Check how the gearbox will become mounted and how it’ll be connected 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 amount of backlash, transmission error, torsional rigidity, and instant of inertia are also important. The amount of torque needed could very well be the most important criteria, as this means the amount of work the speed reducer must perform.
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