Micro Planetary Gear Motor

These tiny brushed DC gearmotors have a diameter of just 6 mm and weigh just over a gram, which makes them great actuators for miniature robots and very small mechanisms. They consist of a coreless motor fastened to a planetary gearbox by a small clip. The gears are made from liquid crystal polymers (LCPs), and gearbox’s nylon output shaft is compatible with our 14 mm wheels. Three gear ratios are available:

26:1, which has a free run speed of 2500 RPM and stall torque of 1.5 oz-in (110 g-cm) at 6 V

136：1，其自由运行速度为500 rpm，在6 V时为8盎司（550 g-cm）的摊位扭矩为8盎司（550 g-cm）

700:1, which has a free run speed of 90 RPM and stall torque of 12 oz-in (900 g-cm) at 6 V

注意：停滞或超负荷齿轮机可以大大降低其生命，甚至立即造成损坏。对于这些变速箱，推荐的瞬时扭矩上限为3.5盎司（250 g-cm）；我们强烈建议在此限制下保持良好的施加负载。摊位也可能导致电动机绕组和刷子的热损害迅速（可能是几秒钟的阶数）；拉丝直流电动机操作的一般建议是失速电流的25％或更少。

The intended nominal operating voltage for these motors is 3 V to 6 V, though in general, these kinds of motors can be used at voltages outside this range (rotation typically starts between 0.2 V and 0.3 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor. When operating at 3 V, the free-run speed, stall torque, and stall current will all be approximately half of what they are at 6 V as these specifications scale roughly linearly with voltage.

Since the gearmotor’s output shaft is nylon, there can be small variances in the diameter from unit to unit. These variations might cause press-fit attachments like our 14 mm wheel to fit loosely in some instances. If you experience a loose fit, you could try swapping wheels or using a small dab of glue to help hold the wheel on.