A planetary gearbox identifies a gear system where one or more ‘planet’ gears rotate around a central ‘sun’ gear. Typically, a world carrier is driven by the insight torque which rotates the planets around a set outer ring (sometimes referred to 
as the annulus). This in turn drives the sun gear which then provides the output torque. However there are types of the other combinations, such as the sun gear being fixed and the band providing output torque.
The main benefit of planetary gearboxes are their high power transmission efficiencies. Typicially this could be around simply 3% per stage. Further to this, the high effiency is definitely delivered regardless of the compact style giving a large torque to size/weight ratio. Some of this is thanks to the load sharing that occurs over the multiple planet gears.
A planetary gearbox identifies a gear system where one or more ‘planet’ gears rotate around a central ‘sun’ gear. Typically, a planet carrier is driven by the insight torque which rotates the planets around a set outer ring (sometimes known as the annulus). This in turn drives sunlight gear which then supplies the output torque. Nevertheless there are examples of the other combinations, like the sun gear being fixed and the band providing output torque.
The main benefit of planetary gearboxes are their high power transmission efficiencies. Typicially this could be around simply 3% per stage. Further to the, the high effiency is usually delivered despite the compact style giving a sizable torque to size/weight ratio. Some of this is because of the load sharing that occurs over the multiple planet gears.
Reliable Small Planetary Gearbox
EP Motor’s small planetary gearbox is available in 7 different sizes with diameters of 16mm, 22mm, 26mm, 28mm, 32mm, 36mm, and 45mm, each consisting with mono and multi-levels, and the gear ratios range between 3.3:1 ~ 1500:1.