With the many industrial gearboxes on the market, it’s important to match the proper type of gearbox with the drive, motor, and load. When a machine requires a servosystem (drive and motor), the gearbox type is crucial for accurate and repeatable movement. Planetary gearboxes fit the bill for servo applications.
High-precision helical planetary gearboxes are a great choice for applications that require precision and reliability. Planetary gearboxes have got very low backlash ratings (typically ranging from someone to nine arc-min), so when sized correctly provide a service existence of over 20,000 hours with virtually no maintenance. Helical planetary gears provide very calm and better operation when compared with competitive products.
Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They offer power densities that translates to 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 advantageous to use a gearbox between the motor and load.
One main reason to use a gearbox is torque multiplication. It lets designers make use of smaller servosystems that consumes less energy. Instead of buying relatively huge servodrives and motors, developer can use smaller parts, saving space and cash.
Output torque boosts in direct proportion to the gear ratio, and top speed of the output shaft decreases. If an application can withstand the reduced speed, a relatively little servosystem can supply high torque.
Gearboxes can also address inertia mismatches. For powerful servosystems — those with high dynamic responses or low overshoot, for example – the ratio between your 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 sq . of the decrease ratio. For instance, utilizing a 25:1 gearbox reduces the load’s reflected inertia by one factor of 625, a substantial improvement.