What exactly is a planetary gearbox that everyone is talking about?
A planetary gearbox is ingeniously designed with both the input and output shafts perfectly aligned, ensuring seamless power transmission. This marvel in engineering uses its compact structure to deliver immense torque—a concept known as torque density—making it indispensable in various industries.
The bicycle's acceleration hub serves as an exemplary model of a planet-wheel mechanism. Ever pondered how such immense power and functionality fit within such a tiny hub? For a three-speed hub, a one-stage planetary gear system is employed, whereas a five-speed hub utilizes a sophisticated two-stage system. Each planetary gear system offers a reduction state, a direct coupling, and a dynamic acceleration mode.
Mathematically speaking, the planetary gearbox boasts a smallest reduction ratio of 3:1, reaching up to a robust 10:1. Ratios below 3 cause the sun gear to overshadow the planet gears, while ratios above 10 make the sun wheel too diminutive, causing a dip in torque. These ratios remain absolute, represented by integer values.
The genius behind the planetary gearbox remains a mystery, yet it was brilliantly articulated by Leonardo da Vinci in 1490, finding its application across centuries of technological advancements.
Model |
2105 |
2205 |
2207 |
2209 |
2210 |
2211 |
2255D |
311R |
Power |
18.5 |
30 |
18.5/22 |
30 |
37 |
55 |
55 |
55 |
(KW) |
Input Speed |
615 |
818 |
635/635 |
635 |
756 |
756 |
652 |
652 |
(rpm) |
Speed Ratio |
21.95 |
29.2 |
23.54/23.54 |
23.54 |
27 |
27 |
23.3 |
27 |
Output Torque |
6310 |
10232 |
6550/7780 |
10600 |
12620 |
18760 |
18760 |
18760 |
(N.M) |
Max. Torque |
11400 |
18500 |
11000/13000 |
18000 |
22700 |
33800 |
33800 |
40000 |
(N.M) |
Weight |
141 |
180 |
138 |
132 |
205 |
220 |
303 |
352 |
(KG) |
Application |
1~1.25mm |
1.5mm |
1mm |
1.5mm |
2~2.5mm |
3mm |
3~3.5mm |
3~4.5mm |
- The gearbox housing is meticulously crafted to support parallel shaft modes and horizontal mounting. Its flexible component array allows unparalleled adaptability, revolutionizing reducer configurations like never before.
- Designed with an acoustic-friendly structure, expansive surface area, and a robust fan, this gearbox excels in temperature and noise regulation. The precision-grinded cylindrical and bevel gears ensure stability and deliver flawless power transmission.
- Input Mode: Choose from motor-connected flange or shaft input options to perfectly align with your specific operational requirements.
- Output Mode: Versatile options include solid shafts with flat key, hollow shafts with flat key, hollow shafts with shrink disk, and both hollow and solid shafts with involute splines or flange, offering customization for every application.
Mounting Mode: Versatility at its best with foot-mounted, flange-mounted, swing base-mounted, and torque-arm-mounted styles, promising adaptability across various platforms.
- The planetary gearbox series dazzles with an array of sizes from 3 to 26, stages ranging from 1 to 4, and comprehensive ratios from 1.25 to 450. When combined with WR, S, and K series, the potential ratios expand dramatically, offering heightened performance capabilities.


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Packaging |
Size |
800(L) * 800(W) * 800 (H) |
Packed Wear Parts to Delivery |
Transport of Large Trucks to The Seaport |
Packaging Details |
The normal package is wooden box(Size: L*W*H). If container is too tight,we will use PE film for packing or pack it according to customers special request. |
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