{"product_id":"15by-mini-15mm-2-phase-4-wire-gear-stepper-motor-metal-gearbox-diy","title":"15BY Mini 15mm 2-Phase 4-Wire Gear Stepper Motor Metal Gearbox","description":"\u003ch2\u003e15BY Mini 15mm 2-Phase 4-Wire Gear Stepper Motor with Full Metal Gearbox\u003c\/h2\u003e\n\u003cp\u003eUpgrade your DIY electronics and precision engineering projects with the \u003cstrong\u003e15BY Mini Gear Stepper Motor\u003c\/strong\u003e. This compact 15mm micro stepping motor features a full metal gearbox with an approximate \u003cstrong\u003e1:34.75 reduction ratio\u003c\/strong\u003e, delivering smooth, precise, and repeatable motion control. Ideal for makers, engineers, and hobbyists who demand accuracy in a tiny package.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2-Phase, 4-Wire Design:\u003c\/strong\u003e Industry-standard wiring for easy integration with most stepper motor driver boards.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll Metal Gearbox:\u003c\/strong\u003e Durable full metal gear reducer for long-lasting performance and consistent torque output.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Reduction Ratio (~1:34.75):\u003c\/strong\u003e Approximately 695 pulse signals required for one full 360° rotation of the output shaft — ideal for precise positioning tasks.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Step Angle:\u003c\/strong\u003e Motor step angle of 18°; output shaft step angle of approximately 0.52° for fine-grained motion control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact 15mm Form Factor:\u003c\/strong\u003e Fits into space-constrained builds and miniature mechanical assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application Range:\u003c\/strong\u003e Commonly used in monitoring equipment, communication devices, precision instruments, and robotic mechanisms.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMotor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2-Phase 4-Wire Stepper Motor\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMotor Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReduction Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~1:34.75\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStep Angle (Motor)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18°\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStep Angle (Output Shaft)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~0.52°\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePulses per Revolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~695\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhase Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e19.7 Ω (6V, short-circuit current: 280mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGearbox Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFull Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × Gear Stepper Motor\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWireless\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e⚠️ Important Notice\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAn external stepper motor driver is required to operate this motor.\u003c\/strong\u003e Direct connection to a power supply will NOT cause the motor to run. Please ensure you have a compatible 2-phase stepper motor driver before use.\u003c\/p\u003e\n\n\u003ch3\u003eIdeal For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY robotics and automation projects\u003c\/li\u003e\n  \u003cli\u003ePrecision instrument mechanisms\u003c\/li\u003e\n  \u003cli\u003eMonitoring and communication equipment\u003c\/li\u003e\n  \u003cli\u003eCamera sliders and pan-tilt systems\u003c\/li\u003e\n  \u003cli\u003eCNC and motion control builds\u003c\/li\u003e\n  \u003cli\u003eEducational and prototyping applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-10g-high-grade-silicon-grease-lubricant-o-lubrication-good-odorless-smoothness-for-o-rings-tube-silicone-grease-lubricant\"\u003e1PC 10g High Grade Silicon Grease Lubricant for O-Rings \u0026amp; Mechanical Parts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-exhaust-duct-interface-pipe-hose-connector-for-ac-exhaust-pipe-extension-joint-does-not-require-clamp-ring-comes-with-thread\"\u003e1PC Exhaust Duct Interface Pipe Hose Connector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-multi-use-faucet-bubbler-wrenches-6-sizes-sink-wrenches-detach-tool-for-kitchen-bathroom-faucet-parts-repair-spanner\"\u003e1PC Multi-Use Faucet Bubbler Wrenches \u0026amp; Repair Spanner\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does the 15BY gear stepper motor work when connected directly to a power supply?\u003c\/h4\u003e\n\u003cp\u003eA: No. The 15BY 2-phase 4-wire gear stepper motor requires an external stepper motor driver to function. Direct connection to a power supply will not produce motor movement. You must use a compatible stepper driver board to send the required pulse signals.\u003c\/p\u003e\n\u003ch4\u003eQ: How many pulse signals are needed for one full rotation of the output shaft?\u003c\/h4\u003e\n\u003cp\u003eA: Approximately 695 pulse signals are required for the output shaft to complete one full 360° rotation, thanks to the ~1:34.75 metal gear reduction ratio. The output shaft step angle is approximately 0.52°, enabling very precise positional control.\u003c\/p\u003e\n\u003ch4\u003eQ: What types of projects is this mini stepper motor suitable for?\u003c\/h4\u003e\n\u003cp\u003eA: This micro gear stepper motor is well-suited for a wide range of DIY and professional applications including robotics, precision instruments, monitoring and communication equipment, camera pan-tilt rigs, CNC machines, and any project requiring compact, accurate motion control.\u003c\/p\u003e\n\u003ch4\u003eQ: What is the phase resistance and operating current of this motor?\u003c\/h4\u003e\n\u003cp\u003eA: The phase resistance is 19.7 ohms. At 6V, the short-circuit current is approximately 280mA. Please factor these values into your driver and power supply selection for optimal performance.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does the 15BY gear stepper motor work when connected directly to a power supply?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. The 15BY 2-phase 4-wire gear stepper motor requires an external stepper motor driver to function. Direct connection to a power supply will not produce motor movement. 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