Compact planetarygeared electronic starter motor designed for small precision drives. Its reduction ratio and small footprint deliver increased torque and smooth lowspeed control while occupying minimal space and weight. Key benefits gear reduction for stronger output torque: 1:171 planetary gearbox converts motor speed into steady lowspeed torque for precise motion control. Very compact and lightweight: total geared height 19.5 mm and weight 4 g make it easy to integrate into spacelimited assemblies. Low electrical demand: rated for DC 2.5 V with a noload current of 40 mA and a noload speed of 92 RPM, suitable for batterypowered and lowvoltage systems. Small, precise output interface: output gear outer diameter 5.35 mm with 11 teeth for direct coupling to small gear trains. Consistent specification for reliable integration: clearly defined dimensions, electrical ratings, and mechanical outputs simplify selection for designers and hobbyists. Key specifications Planetary gearbox outer diameter: 9.9 mm Electronic starter size: 8 x 10 x 12 mm (M10 electronic starter) Geared electronic starter height: 19.5 mm (starter plus gearbox) Output shaft: gear, outer diameter 5.35 mm, 11 teeth Reduction ratio: 1:171 Weight: 4 g Rated voltage: DC 2.5 V Noload current: 40 mA Noload speed: 92 RPM Rated torque: 9.8 mN.m (0.0098 N.m) Maximum torque: 37.2 mN.m (0.0372 N.m) Power: 0.07 W Compatibility and installation notes Designed around the M10 electronic starter form factor with compact gearbox; ideal where an M10 size motor is specified. Small output gear and defined teeth count enable straightforward mechanical coupling to micro gearboxes, pinions, and gear trains. Lowvoltage rating makes it suitable for direct drive from small battery packs or lowvoltage controllers; match controller specifications to 2.5 V operation. Typical applications Micro robotics and micro manipulators where compact size, low speed, and increased torque are required for joint actuation or gripper control. Precision hobby projects such as camera focus mechanisms, micro pan and tilt units, or scale model servos. Small automation or instrumentation devices that need quiet, controlled rotation and minimal power consumption. Why choose this unit Offers a balance of compactness, torque increase through planetary reduction, and low electrical consumption for smallscale mechanical systems. Clear dimensional and electrical data make it easy to evaluate for custom integration and iterative prototyping.