With the many 
commercial gearboxes on the market, it’s vital that you match the proper kind of gearbox with the drive, motor, and load. When a machine requires a servosystem (drive and engine), the gearbox type is crucial for accurate and repeatable movement. 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 also provide very calm and better operation when compared with competitive products.
Precision gearboxes are carefully machined to high tolerances – believe clockmaker, not blacksmith. They offer power densities that means small package size and efficiencies of 90% and greater.
Servomotors often drive loads directly without the need for a gearbox, but in many applications it’s beneficial to use a gearbox servo motor gear reducers between the motor and load.
One main reason to employ a gearbox is torque multiplication. It lets designers make use of smaller sized servosystems that consumes less energy. Instead of buying relatively large servodrives and motors, developer can use smaller parts, saving space and money.
Output torque improves in direct proportion to the apparatus ratio, and top rate of the result shaft decreases. If an application can withstand the reduced speed, a relatively small servosystem can supply high torque.
Gearboxes may also address inertia mismatches. For high performance servosystems — those with high dynamic responses or low overshoot, for instance – the ratio between your reflected load inertia and motor inertia should be as low as practical, ideally under ten-to-one. A precision gearbox reduces the reflected inertia by the sq . of the decrease ratio. For instance, using a 25:1 gearbox reduces the load’s reflected inertia by a factor of 625, a significant improvement.