Planetary gearboxes are designed to increase torque while reducing the speed of a prime mover output shaft (e.g., a motor crankshaft). This means that the output shaft of the gearbox rotates at a slower rate than the input shaft, and this reduction in speed produces a mechanical advantage, increasing torque.

Specifications for planetary gearboxes can vary significantly based on the application and the size and type of motors they are paired with, such as stepper or servo motors. Here are some common specifications you might find:

When selecting a planetary gearbox, it's important to match the gearbox specifications with your motor's capabilities and your application's needs. Ensure the chosen gearbox can handle the motor's speed and torque without exceeding the gearbox's rated capacity.

Planetary gearboxes are mechanical devices used to increase torque and reduce speed from a motor to the driven equipment. They feature several unique characteristics:

1. High Torque Density: Due to their design, planetary gearboxes can handle higher torques in a compact size compared to other types of gearboxes.
   
   
2. High Efficiency: Planetary gearboxes are generally very efficient, with ratings often between 95-98%, meaning less energy is lost in the form of heat and more power is transmitted to the output.
   
   
3. Low Backlash: They can be engineered to have low backlash (the play between mating gear teeth), which is important for precise motion control applications.
   
   
4. High Reduction Ratios: They offer a wide range of gear ratios in a relatively small space. This makes them ideal for applications requiring large speed reductions.
   
   
5. Coaxial Arrangement: The input and output shafts are aligned, which helps in creating a more compact and balanced gearbox design.
   
   
6. Versatility and Adaptability: They can be used in various applications, from robotics and aerospace to automotive and packaging machinery.
   
   
7. Durability and Reliability: The load is distributed over multiple gears, resulting in reduced wear and tear on individual gears, leading to longer service life.
   
   
8. Smooth Operation: The planetary gearing arrangement can provide smoother and quieter operation compared to other types of gear systems.
   
   These features make planetary gearboxes suitable for high precision and high load applications where size and efficiency are critical. However, the best choice depends on the specific needs of the application, including power, speed, torque, and environmental conditions. Always refer to the manufacturer’s specifications and guidelines when selecting a gearbox for your project