Motor inner shaft diameter 1mm Gear: 10-tooth gear (0.2 module) The test is for reference only: The voltage is 3V, the no-load current is 15mA, and the no-load speed is 11000 rpm. The voltage is 5V, the no-load current is 18mA, and the no-load speed is 19,000 rpm. The voltage is 8V, the no-load current is 26mA, and the no-load speed is 31000 rpm. The motor with the main board weighs 6.8 grams.

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