With the many industrial gearboxes available today, it’s important to match the proper type of gearbox with the drive, motor, and load. When a machine needs a servosystem (drive and engine), the gearbox type is critical for accurate and repeatable motion. Planetary gearboxes suit you perfectly for servo applications.
High-precision helical planetary gearboxes are an excellent choice for applications that require accuracy and reliability. Planetary gearboxes have very low backlash rankings (typically ranging from one to nine arc-min), and when sized correctly provide a service life of over 20,000 hours with practically no maintenance. Helical planetary gears provide very noiseless and more efficient operation when compared with competitive products.
Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They provide power densities that 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 your motor and 
load.
One main reason to use a gearbox is torque multiplication. It lets designers use smaller sized servosystems that consumes less energy. Instead of buying relatively huge servodrives and motors, designer can use smaller components, saving space and cash.
Output torque improves in direct proportion to the apparatus ratio, and top quickness of the output shaft decreases. If an application can withstand the reduced speed, a relatively little servosystem can supply high torque.
Gearboxes may also address inertia mismatches. For high performance servosystems — people that have high dynamic responses or low overshoot, for instance – the ratio between the reflected load inertia and engine inertia should be as low as practical, ideally under ten-to-one. A precision gearbox decreases the reflected inertia by the square of the reduction ratio. For instance, utilizing a 25:1 gearbox reduces the load’s reflected inertia by one factor of 625, a substantial improvement.