With the many industrial gearboxes on the market, it’s vital that you match the proper kind of gearbox with the drive, motor, and load. Whenever a machine needs a servosystem (drive and electric motor), the gearbox type is crucial for accurate and repeatable motion. Planetary gearboxes suit you perfectly for servo applications.
High-precision helical planetary gearboxes are a great choice for applications that require precision and reliability. Planetary gearboxes have very low backlash rankings (typically ranging from one to nine arc-min), so when sized correctly offer a service life of over 20,000 hours with virtually no maintenance. Helical planetary gears provide very silent and more efficient operation in comparison with competitive products.
Precision gearboxes are carefully machined to high tolerances – believe clockmaker, not blacksmith. They provide power densities that servo motor gear reducers translates to small bundle size and efficiencies of 90% and greater.
Servomotors often drive loads directly without the need for a gearbox, however in many applications it’s beneficial to make use of a gearbox between the motor and load.
One main cause to use a gearbox is torque multiplication. It lets designers make use of smaller sized servosystems that consumes less energy. Rather than buying relatively huge servodrives and motors, designer can use 
smaller parts, saving space and money.
Output torque raises in direct proportion to the gear ratio, and top rate of the result shaft decreases. If an application can withstand the decreased speed, a relatively little servosystem can supply high torque.