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November 21, 2019

With the many industrial gearboxes available today, it’s vital that you match the proper type of gearbox with the drive, motor, and load. Whenever a machine requires a servosystem (drive and engine), 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 accuracy and reliability. Planetary gearboxes have got very low backlash ratings (typically ranging from someone 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 noiseless and better operation in comparison with competitive products.

Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They provide power densities that means small package size and efficiencies of 90% and greater.
Servomotors often drive loads directly with no need for a gearbox, but 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 use smaller servosystems that consumes much less energy. Instead of buying relatively huge servodrives and motors, designer can use smaller parts, saving space and money.

Output torque increases in direct proportion to the apparatus ratio, and top speed of the result shaft decreases. If an application can withstand the reduced speed, a relatively small servosystem can supply high torque.

Gearboxes can 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 only practical, preferably 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 a factor of 625, a significant improvement.