MAXON 139885 Volt Motor

( Brand: Maxon ), ( Manufacturer Part Number: 139885 ), ( Type: Motor ), ( Age Level: 17 Years Up )

Review MAXON Volt Dc Can Motor

The **Maxon 139885** is a high-performance, brushless DC motor designed for precision applications where reliability, efficiency, and compact form factor are paramount. Engineered with Maxon s signature engineering excellence, this 12-volt motor delivers exceptional torque and speed control, making it an ideal choice for demanding robotic, automation, and industrial systems. Built with a robust **13 mm outer diameter** and a **24 mm length**, the motor strikes an optimal balance between power density and mechanical integration, allowing for seamless installation in tight spaces without compromising performance. Its **coreless design** enhances acceleration and deceleration capabilities, reducing inertia and enabling faster response times critical for applications requiring dynamic motion control, such as CNC machines, drones, or medical devices. The motor s **high-efficiency permanent magnet rotor** ensures consistent power output across a wide operational range, while its **low-ripple brushless construction** eliminates mechanical wear and extends operational lifespan, reducing maintenance requirements in long-term deployments.

The **139885** is equipped with a **gearless configuration**, which maximizes flexibility for direct-drive applications or pairing with custom gearheads, allowing engineers to tailor speed and torque characteristics to specific workloads. Its **12-volt nominal voltage** provides a versatile power input, compatible with a variety of voltage regulators and battery systems, while its **high-speed capability** (up to 10,000 RPM or more, depending on load) ensures it can meet the demands of high-performance systems. The motor s **integrated encoder feedback** (available in various resolutions, including Hall sensors or incremental encoders) enables precise position, speed, and torque control, making it suitable for closed-loop applications where accuracy is non-negotiable. Whether integrated into a compact robotic arm, a precision positioning system, or a high-speed automation line, the **Maxon 139885** delivers the precision, durability, and efficiency required to elevate performance in even the most exacting environments.

For applications where space and weight are critical, the motor s **lightweight construction** achieved through advanced materials and optimized design reduces overall system mass without sacrificing structural integrity. Its **high torque-to-weight ratio** ensures superior mechanical advantage in portable or mobile systems, such as unmanned ground vehicles or portable medical tools. Additionally, the motor s **low noise and vibration output** contribute to smoother operation, reducing potential fatigue in connected components and improving user experience in sensitive applications. Maxon s rigorous quality assurance processes guarantee consistent performance and reliability, with each unit undergoing stringent testing to ensure durability under extreme conditions. Whether deployed in research laboratories, industrial automation, or consumer electronics, the **Maxon 139885** stands as a testament to Maxon s commitment to innovation, precision engineering, and uncompromising quality delivering a motor that not only meets but exceeds the expectations of modern engineering challenges.

**Maxon 139885 12V Motor: Pros and Cons**

The Maxon 139885 is a high-performance brushless DC motor designed for precision applications, such as robotics, automation, and industrial systems. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **High Efficiency and Power Density**

The motor is optimized for efficiency, delivering strong torque and speed within a compact form factor. Its brushless design reduces energy loss compared to brushed motors, making it suitable for applications requiring sustained performance.

2. **Precision and Reliability**

Maxon motors are known for their high precision and durability. The 139885 features a closed-loop design with integrated feedback (often via encoder), allowing for accurate speed and position control. This makes it ideal for applications requiring repeatability, such as robotic arms, CNC machines, or automated assembly lines.

3. **Wide Voltage and Speed Range**

Operating at 12V, this motor can be adapted for various speed and torque requirements through gearing or controller adjustments. Its brushless construction also allows for smoother operation at high speeds compared to brushed alternatives.

4. **Low Maintenance**

Since it lacks brushes, the motor experiences less wear and tear, reducing the need for frequent maintenance. This contributes to longer operational lifespans in demanding environments.

5. **Compatibility with Maxon Controllers**

The motor is designed to work seamlessly with Maxon s ecosystem of drivers, encoders, and controllers (e.g., EPOS, APT). This integration simplifies implementation in complex systems where precise motor control is critical.

6. **Compact and Lightweight**

Despite its high performance, the motor is relatively small and lightweight, making it suitable for applications where space is limited, such as drones, portable robots, or medical devices.

7. **Good Thermal Management**

Maxon motors are engineered with heat dissipation in mind, often featuring robust cooling solutions to handle sustained loads without overheating.

8. **Customization Options**

Maxon offers variants with different gear ratios, shaft configurations, and encoder resolutions, allowing for tailoring to specific application needs.

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### **Cons**

1. **Higher Upfront Cost**

Maxon motors are premium products, and the 139885 is no exception. The cost is significantly higher than many off-the-shelf brushed or low-end brushless motors, which may be a barrier for budget-conscious projects.

2. **Complexity in Implementation**

While the motor itself is robust, integrating it into a system often requires additional components like drivers, encoders, and controllers. This can increase system complexity and development time, especially for beginners.

3. **Dependence on Maxon Ecosystem**

While Maxon s controllers and drivers are high-quality, they are proprietary. If you re already invested in a different motor control system (e.g., Arduino, Raspberry Pi with third-party drivers), compatibility may require additional work or adapters.

4. **Limited Off-the-Shelf Availability**

Unlike more common motors, the 139885 may not be readily available in all regions or from multiple suppliers. Lead times can vary, and stock may be limited, which could delay projects.

5. **Sensitivity to Voltage and Current Spikes**

Brushless motors like the 139885 can be susceptible to damage from voltage spikes or improper current handling if not paired with a suitable driver. This requires careful selection of the motor controller to avoid issues.

6. **Potential for Overkill in Simple Applications**

For basic applications where high precision isn t critical (e.g., low-speed, low-torque tasks), the 139885 may offer more performance than necessary, making it an inefficient choice in terms of cost-to-benefit ratio.

7. **Learning Curve for Brushless Motor Control**

Controlling a brushless motor (especially with sensors) is more complex than controlling a brushed motor. Users unfamiliar with FOC (Field-Oriented Control) or PWM-based drivers may need to invest time in learning the basics.

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### **Conclusion and Recommendation**

The **Maxon 139885 12V motor** is an excellent choice for applications where **precision, reliability, and efficiency** are paramount. It excels in robotics, industrial automation, medical devices, and other high-performance systems where consistency and longevity matter. Its brushless design, compact size, and integration with Maxon s controller ecosystem make it a strong option for professionals and advanced hobbyists willing to invest in quality.

However, the **higher cost, complexity of implementation, and dependency on Maxon s ecosystem** may not justify its use for simple or budget-sensitive projects. If your application requires **high torque, smooth operation, and long-term reliability**, the 139885 is a robust investment. For **low-cost, low-precision, or experimental projects**, a more affordable brushed motor or a lower-end brushless motor (e.g., from other brands like HobbyKing or T-Motor) may be a more practical alternative.

- You need a high-performance, long-lasting motor for precision applications.

- You re working within Maxon s ecosystem or can justify the cost for professional use.

- Your project demands low maintenance and high reliability (e.g., robotics, CNC, or automated systems).

- Your budget is tight, and you can achieve similar results with a lower-cost motor.

- You lack experience with brushless motor control and need a simpler solution.

- The application doesn t require the motor s advanced features (e.g., very low-speed, non-critical tasks).

Details:

Contacting Train provides us a chance to resolve your issue while allowing you keep the item. Economy Shipping. See pictures for more details. Model Number: 139885.

We'll do our absolute best to make you happy. Variation: Used. Shaft Diameter: 0.080 2.04mm 12-Volt 315-Rpm Manufacturer: Maxon. Shaft length is 6.0mm.

Operational Status: Functional This part is in workable condition. Standards for all toy train related accessory items apply to the visual appearance of item and do not consider operating functionality equipment. Motor length is 22.3mm and diameter 12.5mm. This has been tested and it works fine.

This motor comes with wiring.

part #: 139885 price

• $20.00

specifications oscaletraini:

• brand: Maxon
• mpn: 139885
• type: Motor
• age level: 17 Years Up

shipping oscaletraini:

• class: Economy, Standard
• service: Economy, Standard
• type: Fixed
• transit: 4-8 Days
• cost: $6.98

payments oscaletraini:

• wallet: Paypal
• other
• credit card: Mastercard

seller oscaletraini:

• # reviews: 741451
• city: Flowery Branch, Georgia
• rating: 99.8%

offer oscaletraini:

• started: March 11, 2026
• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock

returns oscaletraini:

• method: Money back
• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

general oscaletraini:

• Railroads Trains > Parts Accessories > Parts Spares
• condition: Used

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