Velocity reducers are mechanical products that help drive systems maintain optimal swiftness and torque for the application. Also called gearboxes and gear drives, they lower the quickness of rotation of the input shaft by a specific ratio and increase the power transmitted to the output shaft by the same ratio. Ratio multipliers raise the speed reduction and torque supplied by a speed reducer by a particular ratio and are suitable for parallel setups. Mounting bases, torque arms, and flange couplings are add-ons used with acceleration reducers. They are generally used in applications where in fact 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 precise flanges to permit the engine to be directly connected to the 
reducer or additional adapters with integral couplings. This eliminates the need for individual mounting of the motor, but is usually only practical with smaller sized motors.
Integrating Speed Reducers
After selection, another issue is the way 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 powered 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 quantity of torque needed is perhaps the most important criteria, as this means the amount of work the acceleration reducer must perform.
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