{"product_id":"pololu-3225-3226-3227-3228-3229-3230-3231-3232-3233-metal-gearmotor-25d-mp-12v-without-encoder","title":"Pololu 3225 \/ 3226 \/ 3227 \/ 3228 \/ 3229 \/ 3230 \/ 3231 \/ 3232 \/ 3233 Metal Gearmotor 25D MP 12V - Without Encoder","description":"\u003cmeta name=\"description\" content=\"Buy Pololu 3225 \/ 3226 \/ 3227 \/ 3228 \/ 3229 \/ 3230 \/ 3231 \/ 3232 \/ 3233 Metal Gearmotor 25D MP 12V - Without Encoder online in India at best price from The Tech Depot, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n\n\u003ch1\u003ePololu 3225 \/ 3226 \/ 3227 \/ 3228 \/ 3229 \/ 3230 \/ 3231 \/ 3232 \/ 3233 Metal Gearmotor 25D MP 12V - Without Encoder\u003c\/h1\u003e\n\n\u003cp\u003eThe Pololu 3225-3233 Metal Gearmotor 25D MP is a high-performance 12V brushed DC motor with integrated metal gearbox, delivering variable torque and speed outputs across nine distinct gear ratio configurations. Professional roboticists, autonomous vehicle engineers, and industrial automation specialists rely on this motor family for precision motion control in weight-constrained applications requiring reliable mechanical power transmission. This encoder-free variant eliminates position feedback complexity while maintaining the robust metal construction and consistent performance characteristics essential for drive systems, conveyor mechanisms, and mobile robot platforms operating in demanding field conditions.\u003c\/p\u003e\n\n\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\n\u003cp\u003eThe Pololu 25D Metal Gearmotor series represents a mature engineering solution combining a high-efficiency brushed DC motor with precision-cut metal gears in a compact 25mm diameter housing. The motor operates on 12V nominal supply voltage and features a 6mm diameter output shaft with integrated pinion gear meshing with hardened steel reduction gears. The metal gearbox construction provides superior load capacity and thermal dissipation compared to plastic alternatives, enabling continuous operation under sustained torque loads without performance degradation. Each model in the 3225-3233 range offers different gear ratios, allowing engineers to select optimal speed-torque combinations for specific application requirements without redesigning mechanical interfaces.\u003c\/p\u003e\n\n\u003cp\u003eThe encoder-free configuration eliminates the optical or magnetic feedback sensor, reducing component count, wiring complexity, and overall system cost while maintaining full compatibility with standard motor control circuits and PWM speed controllers. The motor shaft features a 2mm flat for secure coupling to mechanical transmissions, and the compact form factor enables integration into space-constrained platforms such as small wheeled robots, drone landing gear mechanisms, and precision positioning arms. Pololu's manufacturing standards ensure consistent performance across production batches, with sealed bearing construction protecting internal components from dust and moisture ingress in field deployment scenarios.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecification\u003c\/td\u003e\n\u003ctd\u003eDetails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003e12V Metal Gearmotor with Integrated Reduction Gearbox\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePololu Robotics and Electronics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal and Authentic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7 days on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping\u003c\/td\u003e\n\u003ctd\u003e1-5 days from Bengaluru\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003e7-8 days across India\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003e24\/7 via Email and WhatsApp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Operating Voltage\u003c\/td\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Housing Diameter\u003c\/td\u003e\n\u003ctd\u003e25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Shaft Diameter\u003c\/td\u003e\n\u003ctd\u003e6mm with 2mm flat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGearbox Construction\u003c\/td\u003e\n\u003ctd\u003eMetal gears with hardened steel reduction stages\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Gear Ratios\u003c\/td\u003e\n\u003ctd\u003eModels 3225-3233 offer nine distinct ratios from 30.81:1 to 1000:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEncoder Configuration\u003c\/td\u003e\n\u003ctd\u003eWithout encoder - no feedback sensor included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eMetal gearbox construction with hardened steel gears ensuring durability under continuous high-torque operation and extended service life in industrial applications\u003c\/li\u003e\n\u003cli\u003eNine selectable gear ratio variants spanning 30.81:1 to 1000:1, enabling precise speed-torque optimization for diverse mechanical load profiles without motor replacement\u003c\/li\u003e\n\u003cli\u003eCompact 25mm diameter housing with integrated planetary or spur gear stages, minimizing mechanical envelope for integration into space-constrained robotic platforms and mobile systems\u003c\/li\u003e\n\u003cli\u003e6mm output shaft with 2mm flat design facilitating secure mechanical coupling to wheels, pulleys, and drive mechanisms with standard robotics hardware\u003c\/li\u003e\n\u003cli\u003eSealed bearing construction protecting internal components from environmental contamination, enabling reliable operation in dusty, humid, or outdoor field deployment scenarios\u003c\/li\u003e\n\u003cli\u003eEncoder-free design reducing system complexity, component cost, and wiring requirements while maintaining full compatibility with standard PWM motor controllers and H-bridge drivers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eApplications and Use Cases\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eWheeled mobile robot propulsion systems requiring high torque output at moderate speed, with the metal gearbox providing mechanical robustness for terrain navigation and load carrying capacity\u003c\/li\u003e\n\u003cli\u003eAutonomous ground vehicle drive mechanisms where gear ratio selection enables matched motor performance to wheel diameter and terrain resistance characteristics across different platform designs\u003c\/li\u003e\n\u003cli\u003eIndustrial conveyor and material handling systems utilizing the motor's continuous torque delivery for reliable belt or chain drive operation under sustained mechanical load\u003c\/li\u003e\n\u003cli\u003eRobotic arm joint actuators and gripper mechanisms where the compact form factor and selectable gear ratios enable precise positioning and force control in collaborative automation environments\u003c\/li\u003e\n\u003cli\u003eDrone landing gear retraction systems and UAV payload deployment mechanisms leveraging the motor's consistent performance across wide operating temperature ranges\u003c\/li\u003e\n\u003cli\u003eEducational robotics platforms and competition systems where the standardized Pololu interface simplifies mechanical integration and enables rapid prototyping of drive subsystems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eHow to Use\u003c\/h2\u003e\n\n\u003cp\u003eThe Pololu 25D Metal Gearmotor integrates directly into motor control circuits via standard two-wire DC motor connections. Connect the positive and negative terminals to your motor driver output, whether using a simple relay, H-bridge integrated circuit such as the L298N or TB6612FNG, or advanced PWM motor controller. The encoder-free design means no additional signal wiring is required, simplifying circuit layout and reducing microcontroller pin requirements. For speed control, apply PWM signals to the motor driver input with frequency between 5-20 kHz to avoid audible noise and ensure efficient power delivery. For directional control, use the H-bridge configuration to reverse voltage polarity across the motor terminals.\u003c\/p\u003e\n\n\u003cp\u003eMechanical integration requires coupling the 6mm output shaft to your load mechanism using the 2mm flat as a positive drive key. Standard options include set-screw couplings, flexible jaw couplings for misalignment compensation, or direct mounting to wheels and gears using the shaft flat. Ensure proper bearing preload and alignment to minimize mechanical losses and vibration. For continuous operation, monitor motor temperature and implement thermal management if sustained full-power operation exceeds 30 minutes. The metal gearbox requires no lubrication maintenance under normal operating conditions, as internal gears are pre-lubricated during manufacturing. For outdoor or high-dust environments, consider protective boots or bellows around the output shaft to prevent contamination of bearing seals.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the nine gear ratio variants in the 3225-3233 range?\u003c\/summary\u003e\n\u003cp\u003eEach model provides a different gear reduction ratio, with lower numbers offering higher speed and lower torque output, while higher numbers deliver lower speed with increased torque multiplication. Model 3225 provides approximately 30.81:1 reduction, while model 3233 offers approximately 1000:1 reduction. Select your gear ratio based on your application's speed and torque requirements. For example, a mobile robot requiring high wheel speed would use a lower ratio like 3225, while a gripper mechanism needing powerful clamping force would use a higher ratio like 3233.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I add an encoder to this motor for position feedback?\u003c\/summary\u003e\n\u003cp\u003eYes, Pololu offers encoder-equipped variants of the 25D gearmotor series that include integrated optical or magnetic feedback sensors. If your application requires closed-loop speed or position control, you can either purchase the encoder-equipped versions directly, or retrofitting is possible by mounting an external encoder to the output shaft using a flexible coupling. The encoder-free variant you are purchasing is ideal for open-loop speed control applications where feedback is not critical.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the maximum continuous torque output at 12V?\u003c\/summary\u003e\n\u003cp\u003eTorque output varies significantly across the gear ratio range. Lower ratio models like 3225 deliver approximately 0.5-1 kg-cm torque, while higher ratio models like 3233 can exceed 10 kg-cm continuous torque. Consult the specific model datasheet for your selected variant to confirm exact torque specifications. Peak torque during brief acceleration may exceed continuous ratings by 20-30 percent, but sustained operation above continuous torque ratings will cause motor overheating and gearbox wear.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat motor control circuit should I use with this gearmotor?\u003c\/summary\u003e\n\u003cp\u003eAny standard DC motor driver compatible with 12V operation will work with this motor. For simple on-off control, use a relay or MOSFET switch. For speed control, implement a PWM motor controller using integrated circuits like the L298N dual-motor driver or TB6612FNG dual-motor driver. For directional control, use an H-bridge configuration allowing voltage reversal. Ensure your controller can handle the motor's stall current, which typically ranges from 2-5 amps depending on gear ratio. For microcontroller integration, Arduino and Raspberry Pi compatible motor driver shields are widely available.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eIs this motor suitable for outdoor or wet environments?\u003c\/summary\u003e\n\u003cp\u003eThe sealed bearing construction and metal gearbox provide excellent protection against moisture and dust ingress compared to plastic-geared alternatives. However, the motor is not fully waterproof and prolonged submersion will damage internal windings. For outdoor use, implement protective boots around the output shaft bearing area and avoid direct water spray. For applications requiring submersion, consider additional waterproofing measures such as conformal coating or potting of electrical connections. The metal construction ensures superior corrosion resistance compared to plastic alternatives when exposed to humid environments.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eOrders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return and warranty policy?\u003c\/summary\u003e\n\u003cp\u003eWe offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eWhy Buy from The Tech Depot\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eGenuine Products: Sourced directly from authorized distributors with authentication\u003c\/li\u003e\n\u003cli\u003eExpert Team: Our technical team validates every product before listing\u003c\/li\u003e\n\u003cli\u003eFast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse\u003c\/li\u003e\n\u003cli\u003ePan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata\u003c\/li\u003e\n\u003cli\u003ePayment Options: COD, UPI, credit\/debit cards, net banking, EMI available\u003c\/li\u003e\n\u003cli\u003eTechnical Support: 24\/7 expert guidance via email and WhatsApp\u003c\/li\u003e\n\u003cli\u003eReturns: 7-day return policy on manufacturing defects only\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eBuy Pololu 3225 \/ 3226 \/ 3227 \/ 3228\n\u003ch2\u003eBuy Pololu 3225 \/ 3226 \/ 3227 \/ 3228 \/ 3229 \/ 3230 \/ 3231 \/ 3232 \/ 3233 Metal Gearmotor 25D MP 12V - Without Encoder Online in India\u003c\/h2\u003e\n\u003c\/h2\u003e\u003cp\u003ePurchase the \u003cstrong\u003ePololu 3225 \/ 3226 \/ 3227 \/ 3228 \/ 3229 \/ 3230 \/ 3231 \/ 3232 \/ 3233 Metal Gearmotor 25D MP 12V - Without Encoder\u003c\/strong\u003e online at \u003ca href=\"https:\/\/thetechdepot.in\"\u003eThe Tech Depot\u003c\/a\u003e, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat.\u003c\/p\u003e\n\u003cp\u003eOur team in Bengaluru is available 24\/7 to support your journey from product selection to project completion.\u003c\/p\u003e","brand":"The Tech Depot","offers":[{"title":"Default Title","offer_id":48743640039681,"sku":"TTD-8280","price":2473.09,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/1577\/3185\/files\/41a6960c040ce606be83fae192adf22e.jpg?v=1778060810","url":"https:\/\/techdepot.in\/products\/pololu-3225-3226-3227-3228-3229-3230-3231-3232-3233-metal-gearmotor-25d-mp-12v-without-encoder","provider":"Tech Depot India","version":"1.0","type":"link"}