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Planetary Transmission
An assembly of meshed gears consisting of a central or sun gear, a coaxial internal or ring gear, and one or more intermediate pinions supported on a revolving carrier. Sometimes the term planetary gear train is used broadly as a synonym for epicyclic gear train, or narrowly to indicate that the...
An assembly of meshed gears consisting of a central or sun gear, a coaxial internal or ring gear, and one or more intermediate pinions supported on a revolving carrier. Sometimes the term planetary gear train is used broadly as a synonym for epicyclic gear train, or narrowly to indicate that the ring gear is the fixed member. In a simple planetary gear train the pinions mesh simultaneously with the two coaxial gears (see illustration). With the central gear fixed, a pinion rotates about it as a planet rotates about its sun, and the gears are named accordingly: the central gear is the sun, and the pinions are the planets.
This is a compact, 'single' stage planetary gearset where the output is derived from a second ring gear varying a few teeth from the primary.
With the initial model of 18 sun teeth, 60 ring teeth, and 3 planets, this resulted in a 'single' stage gear reduction of -82.33:1.
A regular planetary gearset of this size would have a reduction ratio of 4.33:1.
That is a whole lot of torque in a small package.
At Nominal Voltage
Voltage (Nominal) | 12V |
Voltage Range (Recommended) | 3V - 12V |
Speed (No Load)* | 52 rpm |
Current (No Load)* | 0.21A |
Current (Stall)* | 4.9A |
Torque (Stall)* | 291.6 oz-in (21 kgf-cm) |
Gear Ratio | 231:01:00 |
Gear Material | Metal |
Gearbox Style | Planetary |
Motor Type | DC |
Output Shaft Diameter | 4mm (0.1575”) |
Output Shaft Style | D-shaft |
Output Shaft Support Dual | Ball Bearing |
Electrical Connection | Male Spade Terminal |
Operating Temperature | -10 ~ +60°C |
Mounting Screw Size | M2 x 0.4mm |
Product Weight | 100g (3.53oz) |