A planetary gearbox refers to a gear system where a number of ‘planet’ gears rotate around a central ‘sun’ equipment. Typically, a world carrier is driven 
by the input torque which rotates the planets around a set outer ring (sometimes known as the annulus). Therefore drives the sun gear which then supplies the output torque. However there are types of the various other combinations, like the sun gear being set and the band providing output torque.
The main advantage of planetary gearboxes are their high power transmission efficiencies. Typicially this could be around simply 3% per stage. Additional to the, the high effiency can be delivered despite the compact design giving a huge torque to size/weight ratio. A few of this is because of the load sharing occurring across the multiple planet gears.
A planetary gearbox refers to a gear system where a number of ‘world’ gears rotate around a central ‘sun’ equipment. Typically, a planet carrier is driven by the input torque which rotates the planets around a set outer ring (sometimes known as the annulus). Therefore drives sunlight gear which then supplies the output torque. However there are examples of the additional combinations, like the sun gear being fixed and the ring providing output torque.
The main benefit of planetary gearboxes are their high power transmission efficiencies. Typicially this is often around just 3% per stage. Further to this, the high effiency is delivered despite the compact design giving a huge torque to size/weight ratio. A few of this is thanks to the load sharing occurring over the multiple planet gears.
Reliable Small Planetary Gearbox
EP Motor’s small planetary gearbox comes in 7 different sizes with diameters of 16mm, 22mm, 26mm, 28mm, 32mm, 36mm, and 45mm, each consisting with mono and multi-levels, and the apparatus ratios range between 3.3:1 ~ 1500:1.