Compact 15mm 2Phase Stepper with Full Metal Gearbox A small, robust stepping gear motor designed for precision motion in DIY smart robot projects and compact electromechanical systems. Operates at 5V with a standard 4wire bipolar connection and a 3mm Dshaped output shaft for secure coupling. Key benefits Precision control and higher torque: Integrated full metal gearbox provides reliable torque multiplication and smooth, repeatable motion for positioning tasks. Low voltage operation: 5V rating makes the unit easy to power from common microcontroller power supplies and battery packs. Simple integration: 2phase, 4wire configuration is compatible with standard bipolar stepper drivers and microcontroller boards, enabling straightforward control with common platforms. Compact and durable: 15mm form factor and metal gearbox fit tight spaces while delivering longlasting mechanical performance. Secure shaft coupling: 3mm Dshaped shaft prevents slippage and simplifies attachment of wheels, pulleys, and couplers. Specifications Model type: 15mm stepping gear electronic starter Motor type: 2 phase stepper Voltage: 5V Wiring: 4 wire (bipolar) Output shaft: 3mm D shaft Gearbox: full metal gearbox Intended use: DIY smart robot and hobby electronics projects How it solves common problems Replaces flimsy plastic gear motors with a full metal gearbox for improved durability and consistent torque under load. Reduces development time by using a common 4wire bipolar interface supported by many stepper drivers and libraries. Fits compact designs where room is limited without sacrificing mechanical strength. Compatibility and control Works with common bipolar stepper drivers and microcontroller boards, compatible with development platforms such as Arduino and Raspberry Pi for pulse and direction control. Suitable for microcontroller driven stepper libraries and stepper driver modules that support 5V logic. Practical use scenarios Micro mobile robot drive: Use as a wheel or actuator motor for small robots where space is limited and reliable torque is required. Pantilt and camera control: Provide smooth, accurate rotational positioning for small camera rigs, sensors, and gimbals. Precision hobby mechanisms: Ideal for miniaturized rotary stages, small feeders, and positioncontrolled mechanisms in DIY automation projects. Installation notes Verify driver current settings and stepper driver compatibility before powering to avoid overheating. Secure the 3mm D shaft with an appropriate set screw coupler or hub for mechanical performance. Confirm mounting dimensions and gear orientation to ensure fit in your project enclosure. This 15mm 2phase stepper with full metal gearbox delivers compact precision and durability for hobbyists and makers building smart robots and small motioncontrolled devices.