With the many industrial gearboxes on the market, it’s important to match the proper kind of servo motor gear reducers gearbox with the drive, motor, and load. When a machine needs a servosystem (drive and electric motor), the gearbox type is critical for accurate and repeatable movement. Planetary gearboxes suit you perfectly for servo applications.
High-precision helical planetary gearboxes are an excellent choice for applications that need precision and reliability. Planetary gearboxes have got very low backlash ratings (typically ranging from one to nine arc-min), so when sized correctly provide a service life of over 20,000 hours with virtually no maintenance. Helical planetary gears also provide very tranquil and more efficient operation in comparison with competitive products.
Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They offer power densities that means small package size and efficiencies of 90% and greater.
Servomotors often drive loads directly with no need for a gearbox, however in many applications it’s beneficial to make use of a gearbox between your motor and load.
One main reason to use a gearbox is torque multiplication. It lets designers use smaller sized servosystems that consumes much less energy. Rather than buying relatively large servodrives and motors, designer can use smaller components, saving space and money.
Output torque improves in direct proportion to the apparatus ratio, and top quickness of the output shaft decreases. If an application can withstand the decreased speed, 
a relatively little servosystem can supply high torque.