N20 Motor Datasheet: Complete Technical Specifications and Applications

Introduction

The Keshuo Motor n20 motor is a compact, high‑performance DC gear motor widely used in robotics, automation, and small‑scale mechanical projects. The N20 Motor Datasheet of Keshuo Motor provides detailed technical specifications, performance curves, and application guidelines to help engineers, hobbyists, and manufacturers integrate this motor effectively.

Modern precision engineering frequently demands high actuation performance within extremely restricted physical envelopes. Engineers designing miniaturized systems consistently face the challenge of balancing limited spatial allocation with adequate mechanical output and reliable control feedback. The n20 motor series has emerged as an industry‑proven workhorse for applications requiring dense integration without sacrificing actuation stability. Utilizing a standardized n20 motor architecture allows development teams to accelerate prototyping phases while maintaining predictable performance baselines – from simple open‑loop speed control to sophisticated closed‑loop position servo systems.

Whether you are designing a robotic gripper, a portable medical pump, or an automated camera slider, understanding the n20 motor's electrical and mechanical properties is essential for achieving optimal performance and service life. Accessing a comprehensive datasheet that details electrical parameters, gear reduction options, and physical footprints is critical for ensuring a smooth transition from initial laboratory prototyping to high‑volume production. This guide consolidates verified engineering data from multiple sources, including Keshuo Motor's official documentation, to serve as a reliable reference for your next design. The n20 gear motor family covers a wide range of voltages and ratios, making it one of the most flexible miniature drive solutions available today.

Beyond the basic specifications, the real-world success of any actuation project depends on how well the motor's characteristics match the load profile. Factors such as inertia matching, thermal management, and environmental robustness all play a role. This article not only presents the core data but also provides practical insights into selecting, mounting, and driving the n20 dc motor for demanding applications. Whether you are looking for n20 motor dimensions to fit a tight enclosure or evaluating n20 motor torque for a high‑force linear actuator, the information here will guide you through the decision‑making process.

KS-N20 Brushed DC Motor Exploded View (PDF)

Key Specifications of Keshuo N20 Motor

Electrical Parameters

• Voltage Range: 3V – 12V DC (6V nominal for balanced speed and thermal management)
• No‑Load Speed: 1,000 – 30,000 RPM (varies with gear ratio and winding)
• Stall Current: 0.5A – 1.2A (depending on voltage; up to 1.5A in some variants)
• No‑Load Current: 30mA – 80mA (typically 40–100mA)
• Power Output: 1W – 5W
• Insulation Class: Class E (120°C) for windings

The electrical characteristics are directly influenced by the internal winding resistance and the number of turns. Lower‑turn windings yield higher no‑load speeds but draw more current at stall, while higher‑turn windings offer better low‑speed torque efficiency. Always consult the specific model's datasheet for exact values, as production tolerances and material choices affect actual performance. For battery‑operated devices, selecting a n20 6v motor often provides the best compromise between power consumption and output capability, whereas a n20 motor 12v variant delivers higher peak speeds and torque when a regulated supply is available.

Mechanical Dimensions & Gearbox

The standard N20 gearbox is a spur‑gear reduction unit (not planetary, though some similar‑sized motors do use planetary gears). The metal housing measures approximately 10mm in width and 12mm in height, with overall length varying by ratio and shaft configuration. The output shaft typically features a standard diameter of 3mm with a D‑cut profile to ensure secure engagement with gears, pulleys, or linkage arms without relying solely on friction set screws. Faceplate mounting is provided via two M1.6 threaded holes on the front face of the gearbox, requiring careful tolerance verification in CAD assemblies.

The housing is commonly nickel‑plated steel; internal gears may be brass, hardened POM, or all‑metal, depending on the manufacturer and load profile. All‑metal gear trains are preferred for high‑torque and high‑cycle applications, while POM gears offer quieter operation and lower cost. Material choices vary – always verify with the specific datasheet for the exact part number you are using. For projects where weight is critical, a n20 micro gear motor with a POM gearbox can shave off a few grams without sacrificing too much strength. Conversely, if you need maximum durability for continuous industrial use, look for n20 gear motor specifications that explicitly state all‑metal gears and sealed bearings.

When evaluating n20 gear motor dimensions, remember that the total length increases with higher reduction ratios because additional gear stages are added. A 10:1 unit might be only 28mm long, while a 1000:1 version can exceed 40mm. Always check the mechanical drawing for your selected ratio to avoid interference with neighbouring components.

Torque & Efficiency

• Stall Torque: 0.5 kgf·cm – 5 kgf·cm (dependent on gear ratio and voltage)
• Efficiency: 60% – 80% (peak efficiency occurs at about one‑third of the stall torque – confirm with actual curves)
• Recommended Duty Cycle: ≤ 50% for continuous operation (avoid prolonged stall or overload)

As a general approximation, maximum efficiency occurs at about one‑third of the stall torque – but this value is not a fixed specification and should be confirmed with the manufacturer's actual performance curves. Engineers must evaluate n20 motor torque curves to ensure the selected variant operates well below thermal saturation limits during continuous duty cycles. The maximum power output point typically lies near 50% of stall torque, where the product of speed and torque is highest. For a given application, you may need to trade off between efficiency and power output – for example, a n20 reduction motor with a high ratio might be less efficient but delivers the required force for a valve actuator.

The n20 motor torque capability is directly proportional to the gear ratio and the input voltage. At 6V, a 300:1 unit can produce around 2–3 kgf·cm of stall torque, which is sufficient to lift small objects or rotate heavy linkages. However, the torque constant Kt (Nm/A) varies between winding types; always refer to the specific datasheet for the exact relationship.

Gearing Options & Reduction Ratios

The internal spur gearbox provides a wide range of ratios, trading speed for torque:

• Low Ratios (10:1 – 50:1): High speed, rapid response – ideal for optical scanner mirrors, fast‑acting indicator flags, and high‑speed mechanisms.
• Medium Ratios (100:1 – 300:1): Balanced speed/torque – used in robot drive wheels, conveyor rollers, and camera sliders.
• High Ratios (500:1 – 1000:1): Maximum torque – for linear actuators, valve positioning, and precision screw drives.

Backlash increases slightly with higher reduction ratios due to cumulative tolerance stack‑up of multiple gear stages. Typical backlash values range from 1° to 3° at the output shaft for standard ratios, but this can vary with gear material and manufacturing quality. System designers requiring absolute zero‑backlash positioning should factor closed‑loop encoder feedback directly into the control algorithm to compensate for mechanical play.

When selecting a n20 gear motor with encoder, the effective resolution at the output shaft is the encoder PPR multiplied by the gear ratio. For instance, a 7‑PPR encoder on a 300:1 gearbox yields 2100 counts per revolution – enough for many positioning tasks. The availability of different ratios means you can fine‑tune the speed‑torque trade‑off without changing the motor's physical footprint, which is a major advantage of the n20 micro dc motor family.

Encoder Integration

An n20 motor with encoder typically uses a magnetic Hall‑effect sensor on the rear shaft extension. Hall‑effect types are robust against dust and particulate contamination, making them ideal for industrial environments. Some variants may use optical slotted disks for higher resolution, but magnetic encoders are more common due to their durability and lower cost.

Pulses Per Revolution (PPR): Commonly 7–13 PPR before gear reduction (some models offer 3–7 PPR for low‑cost applications, while high‑resolution versions can reach 20+ PPR). Factoring in the gearbox ratio yields effective resolution at the output shaft – for example, a 300:1 gearbox with 7 PPR gives 2100 pulses per output revolution.

Pinout: Motor power (+/‑), encoder VCC (3.3–5V), GND, and quadrature channels A, B (and sometimes index Z).

Signal Filtering: External pull‑up resistors (typically 10kΩ) and microcontroller interrupt service routines ensure accurate quadrature decoding for precise PID speed/position control.

Proper filtering and interrupt handling enable precise PID speed/position control with microcontrollers like Arduino, STM32, or dedicated motor drivers that support quadrature decoding. The encoder output frequency scales with motor speed – ensure your microcontroller can handle the interrupt rate at maximum RPM. For applications that require absolute positioning, consider a n20 encoder motor with an index pulse, which provides a reference once per revolution.

Integrating a n20 motor with encoder also allows for velocity estimation through frequency measurement, which is useful for smooth speed regulation in conveyor belts or camera pan mechanisms. The combination of a compact n20 micro motor and a quadrature encoder provides a cost‑effective solution for closed‑loop control without the bulk of external sensors.

Performance Graphs & Curves

The following typical curves illustrate the behaviour of the n20 motor under various conditions. Actual data vary with ratio and voltage – always consult the official curves for your specific part number.

Current Draw Under Load – essential for power supply and driver selection. At stall, current can be 5–10× the no‑load value; always size your power source accordingly. The current consumption increases linearly with torque, following the relationship I = I₀ + (T / Kt), where I₀ is no‑load current and Kt is the torque constant. Detailed curves are available in the official PDFs below.

Understanding these curves is vital for predicting the n20 gear motor price vs. performance trade‑off – a higher‑performance variant may cost more but can save money on external gearing or cooling. Always compare the n20 motor price against the total system cost when making your selection.

Applications of Keshuo N20 Motor

Industrial Automation & Robotics

• Robotic manipulators: Arms, grippers, and small actuators for pick‑and‑place systems. The n20 reduction motor is particularly suited for finger joints due to its high torque density.
• Camera platforms: Automated sliders, pan‑tilt units, and focus mechanisms. A n20 gear motor with encoder provides smooth velocity control for cinematic shots.
• Valve actuators: High‑ratio variants for reliable seal control in fluid systems. The n20 micro gear motor can run at low speeds with high holding torque.
• Humanoid joints: Miniature fingers, wrist drives, and animatronic facial expressions. The small n20 motor dimensions allow integration into tight spaces.
• Conveyor systems: Small belt drives for component positioning. A n20 6v motor offers a good balance for light‑duty conveying.
• AGV steering: Compact steering actuators for automated guided vehicles. The n20 motor 12v version delivers the extra power needed for wheel steering.

Medical & Laboratory Equipment

• Diagnostic analyzers: Quiet, low‑noise gear trains for precise fluid metering and mixing. The n20 micro dc motor is chosen for its low vibration.
• Infusion pumps: Reliable, low‑speed actuation for dose control. A n20 gear motor with encoder ensures accurate delivery rates.
• Optical instruments: Focus and zoom adjustments in portable scopes and microscopes. The n20 motor dimensions are ideal for handheld devices.
• Laboratory automation: Small conveyor systems and sample handling mechanisms. The n20 gear motor specifications are compatible with cleanroom environments.
• Dental equipment: Miniature drives for handpiece adjustments. The n20 micro motor offers the required torque in a tiny package.

Keshuo Motor ensures every production batch undergoes strict factory‑direct testing to guarantee performance consistency across these demanding deployment scenarios. All reputable units comply with RoHS and CE directives for global market access. When evaluating n20 gear motor price for medical applications, consider the long‑term reliability and the cost of failure – a slightly higher upfront cost often pays off in reduced downtime.

How to Read & Use This Datasheet

Selecting the optimal actuator requires a systematic engineering evaluation workflow:

Determine Voltage: 3V for strict battery‑saving constraints; 6V for general balance; 12V for maximum speed and power density. Remember that higher voltage also increases no‑load speed and stall torque proportionally. For example, a n20 6v motor will run at about half the speed of a 12V version with the same winding.

Choose Gear Ratio: Higher ratio → more torque, lower speed. Map expected mechanical resistance against performance curves to avoid thermal overload. Consider the required output speed and torque simultaneously – the operating point should fall within the motor's continuous duty zone.

Check Thermal Limits: Avoid prolonged stall or operation above rated voltage. Ensure adequate heat dissipation for continuous duty cycles. The motor's temperature rise is proportional to I²R losses; use the thermal resistance data if provided.

Driver Compatibility: Use PWM controllers for speed regulation. For closed‑loop control, select an encoder variant and wire quadrature signals to interrupt pins. Ensure the driver can handle the stall current and has sufficient voltage headroom.

Physical Integration: Cross‑reference final dimensions with CAD spatial allocations. Verify shaft orientation, mounting hole positions, and cable routing. Account for the rear shaft extension if an encoder is fitted.

For custom requirements (shaft length, special wiring, modified gear materials, etc.), contact the supplier directly and request official dimensional drawings and OEM specifications. Many manufacturers offer application engineering support to help optimize the motor selection for your specific load profile. When comparing n20 gear motor dimensions across different suppliers, note that the length can vary by a few millimetres due to different bearing styles or encoder designs – always request the mechanical drawing for your exact part number.

Additionally, consider the environmental conditions: if the motor will be exposed to moisture or dust, choose a variant with sealed bearings and a coated housing. The n20 micro gear motor is available in various protection grades; check the datasheet for IP ratings. For high‑vibration environments, all‑metal gears are recommended over POM to prevent wear.

Where to Download Full N20 Motor Datasheet?

High‑speed RC models demand efficient and powerful motors, but for precision industrial applications, accurate performance curves are indispensable. Below are official PDF documents from Keshuo Motor covering various voltage and ratio variants:

Download official performance curves (PDF):

• KS-N20-05Z430-2.4V Planetary Gear Motor Performance Curve (GMP12-N20).pdf
• KS-N20-05Z450-3.0V N20 Gear Motor Performance Curve (GM12-N20).pdf
• KS-N20-06Z325-4.8V N20 Gear Motor Performance Curve (GM1024-N20).pdf
• KS-N20-11135-5.0V N20 Gear Motor Performance Curve (GM12-N20).pdf
• KS-N20-09Z155-6.0V N20 Gear Motor Performance Curve (GM1024-N20).pdf
• KS-N20-07275-12.0V Single Motor Performance Curve (N20).pdf

For 2D and 3D CAD dimensional drawings, refer to the official datasheets provided by the manufacturer for your specific part number – these are essential for accurate mechanical integration. Most manufacturers also provide STEP or IGES files upon request. If you need n20 gear motor dimensions for a custom mounting bracket, these files will save you hours of measurement and trial‑and‑error.

Conclusion

The n20 motor stands as an exceptionally reliable, versatile actuation solution for engineers navigating tight spatial constraints and demanding precision requirements. Its standardized form factor, wide voltage range, and extensive gearbox options make it suitable for a vast spectrum of applications – from consumer robotics to medical diagnostics and industrial automation.

By thoroughly analysing voltage, torque, and efficiency curves, and by choosing the appropriate gear ratio and encoder feedback, users can ensure robust and repeatable performance in their projects. When properly selected and paired with accurate datasheet data, the n20 motor delivers consistent, long‑lasting operation with predictable thermal and mechanical behaviour. The availability of multiple shaft styles, gear materials, and encoder options further enhances its adaptability to custom requirements.

Ultimately, the n20 gear motor family offers an unmatched combination of performance, size, and cost‑effectiveness. Whether you are a hobbyist building a robotic arm or an engineer designing a medical device, the n20 dc motor provides a proven foundation. By leveraging the detailed n20 gear motor specifications and application notes, you can achieve high‑quality results with minimal risk. Remember to factor in n20 motor price against long‑term reliability, and always test your chosen variant under actual load conditions before finalising your design.

Need to custom n20 motor? Contact Keshuo Motor for OEM specifications, tailored shaft lengths, special wiring, or modified gear materials. Always request official documentation to guarantee that your design matches the exact production parameters. With proper selection and integration, the n20 motor will continue to be a trusted workhorse in the world of miniature actuation.

FAQ – Frequently Asked Questions