15BY Mini 15mm 2-Phase 4-Wire Gear Stepper Motor Micro Full Metal Gearbox Gear Stepping Motor DIY Robot Car Monitor Camera _x000D_ _x000D_ _x000D_ _x000D_ Specification: _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Micro stepper reducer motor, all metal gear reducer, with a reduction ratio of approximately 1:34.75, _x000D_ approximately 695 pulse signals output shaft rotation of 360 degrees, using a 15mm 2-phase 4-wire stepper motor (which requires an external driver to operate). _x000D_ _x000D_ This type of miniature stepper motor is commonly used in monitoring equipment, communication equipment, and precision instruments. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ Attention: The stepper motor requires an external stepper motor driver to operate normally. _x000D_ _x000D_ If it is directly connected to power, it cannot operate. This motor is a 2-phase 4-wire stepper motor. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ 1.Motor diameter: 14.8mm _x000D_ _x000D_ 2.Motor length: 21.7mm (motor+gearbox) _x000D_ _x000D_ 3.Output shaft diameter: 3.0mm (D shaft 2.5mm) _x000D_ _x000D_ 4.Output shaft length: 4.4mm (include step height) _x000D_ _x000D_ 5.Gearbox gear ratio: about 1:34.75 (Approximately 695 pulses output shaft rotation 360 degrees) _x000D_ _x000D_ 6.Step angle: motor is 18 degree; output shaft is about 0.52 degree _x000D_ _x000D_ 7.Motor type: 2-phase 4-wire stepper motor _x000D_ _x000D_ 8.Phase resistance: 19.7 ohms (@6V short circuit current 280mA) _x000D_ _x000D_ 9.Weight: 16g _x000D_ _x000D_ _x000D_ ========================= _x000D_ _x000D_ _x000D_ _x000D_ Package List: _x000D_ _x000D_ _x000D_ _x000D_ Motor x 1PCS _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_