STEALTH PX42-005 Planetary Gearhead Bayside Motion MX115-005-059 5/1

( Brand: Stealth ), ( Manufacturer Part Number: PX42-005 ), ( Country Of Origin: United States )

Review STEALTH Planetary Gearhead 5/1 Bayside Motion

The **Stealth PX42-005 Planetary Gearhead** paired with the **MX115-005-059** motor from Bayside Motion represents a high-performance, precision-engineered solution for demanding motion control applications where torque amplification, compact design, and reliability are critical. This gearhead is part of Bayside Motion s advanced **PX42 series**, a line of planetary gearheads renowned for their robust construction, high efficiency, and seamless integration with their corresponding brushless DC motors. The **PX42-005** model features a **5:1 gear ratio**, delivering a balanced trade-off between torque output and speed reduction, making it ideal for applications requiring moderate to high torque while maintaining operational speed. Its **planetary gear design** ensures uniform load distribution across multiple gear teeth, minimizing wear and extending the gearhead s operational lifespan even under heavy or cyclic loads. The compact footprint of the PX42-005, with its **42mm outer diameter**, allows for integration into space-constrained systems without compromising performance, while its **backlash-free operation** and smooth meshing of precision-machined gears ensure minimal energy loss and predictable motion profiles.

The **MX115-005-059** motor, specifically paired with this gearhead, is a **115mm outer diameter brushless DC motor** with a **0.059 kg cm (59 g cm) no-load torque** at 3V, offering a versatile power-to-size ratio that complements the gearhead s torque amplification capabilities. Together, this combination produces a system capable of handling dynamic loads with precision, making it suitable for applications in robotics, automation, medical devices, industrial machinery, and custom motion control systems. The gearhead s **high rigidity** and **low backlash** (typically under 1 arc-minute) ensure that the system maintains positional accuracy even under varying loads, while its **sealed design** protects internal components from dust, debris, and moisture, enhancing durability in harsh environments. The **direct shaft coupling** between the motor and gearhead eliminates the need for additional couplings, reducing potential sources of misalignment and vibration, which further contributes to the system s overall efficiency and longevity.

Bayside Motion s engineering of this gearhead also incorporates **optimized lubrication pathways** and **high-strength materials**, including hardened and ground gears, to withstand continuous operation under high torque conditions. The **PX42-005** is compatible with Bayside s **MX-series motors**, which are known for their **high torque density, low inertia, and smooth operation**, making this combination particularly well-suited for applications requiring rapid acceleration, precise positioning, or continuous motion. Whether deployed in a **robotics arm**, **automated conveyor system**, **medical imaging device**, or **custom CNC setup**, this gearhead-motor pairing delivers a harmonious blend of power, precision, and reliability. Engineers and designers can leverage this system with confidence, knowing that it will perform consistently under demanding conditions while maintaining minimal heat generation and operational noise. Additionally, Bayside Motion s emphasis on **modularity and customization** allows for tailored solutions, whether integrating with existing control systems or adapting to unique mechanical interfaces. In summary, the **Stealth PX42-005 Planetary Gearhead with MX115-005-059 motor** is a premium choice for applications where performance, durability, and compact integration are non-negotiable.

**Pros and Cons of buying a Stealth PX42-005 Planetary Gearhead (MX115-005-059) from Bayside Motion**

### **Pros**

The Stealth PX42-005 planetary gearhead paired with the MX115-005-059 motor from Bayside Motion offers several advantages for robotics, automation, or industrial applications:

1. **High Efficiency and Torque Density**

The planetary gearhead design provides excellent torque output in a compact form factor, making it ideal for applications requiring precise motion control with minimal backlash. This efficiency reduces energy consumption and heat generation compared to traditional spur gear systems.

2. **Durability and Reliability**

Planetary gearheads are known for their robustness, with load distribution across multiple gears, which extends their operational lifespan. The Stealth series is designed for high-torque applications, ensuring long-term performance under heavy loads.

3. **Precision and Low Backlash**

The gearhead s design minimizes backlash, which is critical for applications requiring high positional accuracy, such as CNC machines, robotic arms, or automated assembly lines. This reduces errors in motion control systems.

4. **Compatibility with Brushless Motors**

The MX115-005-059 motor is a high-performance brushless DC motor that pairs seamlessly with the gearhead, offering smooth operation, high speed, and efficient power conversion. This combination is well-suited for applications needing both torque and speed control.

5. **Modular and Customizable**

Bayside Motion offers a range of gearhead and motor combinations, allowing for customization based on specific torque, speed, and voltage requirements. This flexibility makes it adaptable to various projects, from hobbyist robots to industrial automation.

6. **Support and Documentation**

Bayside Motion provides detailed technical specifications, wiring diagrams, and customer support, which can be invaluable for integration into larger systems. Their resources often include firmware examples and mounting guides for easier implementation.

7. **Cost-Effective for High-Performance Needs**

While not the cheapest option on the market, the combination of motor and gearhead offers a balanced performance-to-price ratio for applications where reliability and precision are prioritized over cost savings.

---

### **Cons**

1. **Complexity in Integration**

The gearhead and motor combination may require additional components such as encoders, controllers, or drivers for full functionality. Beginners or those without experience in motor control systems might find setup challenging, especially if they lack familiarity with brushless motor drivers (e.g., using an FOC controller like the Stealth s recommended options).

2. **Limited Stock or Lead Times**

Depending on demand, Bayside Motion or authorized distributors may have limited stock or longer lead times for specific gearhead-motor combinations. This could delay projects if parts are not readily available.

3. **Warranty and Return Policies**

While Bayside Motion generally offers good customer service, warranty claims or returns may require proof of proper usage and installation. Damages caused by misuse (e.g., overloading, incorrect mounting) might not be covered, which could be a risk for inexperienced users.

4. **Learning Curve for Advanced Features**

The gearhead s high precision and the motor s brushless operation require an understanding of motor control algorithms (e.g., field-oriented control). Users without prior experience may need to invest time in learning how to configure the controller (e.g., tuning PID parameters) for optimal performance.

5. **Cost Compared to Simpler Alternatives**

For applications where high precision is unnecessary, simpler gearheads or motors (e.g., brushed DC motors with worm gears) may suffice and could be significantly cheaper. The Stealth PX42-005 and MX115-005-059 are best suited for performance-critical applications and may not justify the expense for basic projects.

6. **Physical Size and Mounting Constraints**

The gearhead s compact design, while an advantage in some cases, may limit mounting flexibility in space-constrained applications. Users must ensure their mechanical setup can accommodate the gearhead s dimensions and mounting holes without compromising structural integrity.

7. **Dependence on Third-Party Controllers**

While Bayside Motion provides compatibility guides, users may still need to source additional hardware (e.g., ESC, microcontroller, or motor driver) from third parties. This can add to the overall project cost and complexity, especially if compatibility issues arise.

---

### **Ending Conclusion**

The **Stealth PX42-005 planetary gearhead paired with the MX115-005-059 brushless motor from Bayside Motion** is a high-quality, performance-oriented choice for applications demanding precision, torque, and reliability. Its planetary gear design, combined with the efficiency of a brushless motor, makes it suitable for robotics, automation, and industrial systems where accuracy and durability are critical. However, the setup may require technical expertise, especially in motor control programming, and the cost may be prohibitive for simpler or hobbyist-level projects.

For users with experience in motor control or access to technical support, this combination delivers exceptional performance. Beginners or those working on low-budget projects might find it overkill and could explore simpler alternatives first. Ultimately, the decision depends on the specific requirements of the project balancing the need for precision against the complexity and cost involved.

---

### **Recommendation**

- You are working on a **high-performance robotics, automation, or industrial application** where torque, precision, and efficiency are non-negotiable.

- You have **some experience with brushless motor control** or are willing to invest time in learning how to configure the motor driver (e.g., using an FOC controller like the Stealth s recommended options).

- Your budget allows for a **premium gearhead-motor combination** without compromising other critical components of your project.

- You need a **compact, durable solution** that minimizes backlash and maximizes load capacity.

- Your project is **budget-constrained** or requires only basic motion control (e.g., simple hobby robots, low-torque applications).

- You lack experience with **brushless motor drivers or motor control algorithms**, as setup could become frustrating without proper guidance.

- You prioritize **ease of use and simplicity** over high performance, in which case simpler gearheads or brushed motors may suffice.

- You anticipate **long lead times or stock issues**, as this could delay your project timeline.

- For hobbyist or low-cost projects, consider **simpler planetary gearheads** (e.g., from RobotShop or Pololu) paired with brushed motors.

- If you need **even higher torque**, explore **larger gearhead-motor combinations** from Bayside Motion or other manufacturers like Maxon or Faulhaber.

- For **open-source or DIY-friendly solutions**, research **Arduino-compatible motor drivers** (e.g., TB6612FNG for brushed motors) or **Raspberry Pi-based FOC controllers** (e.g., EasyDriver) to reduce complexity.

In summary, this gearhead-motor pair is a **strong choice for advanced users** but may not be the best fit for beginners or cost-sensitive projects. Always evaluate your project s specific needs before committing to purchase.

Details:

It is missing 4 internal bolts on the front side, and no operational testing has been performed. This unit is in unknown condition and being sodas-is for parts or repair. Up for sale is a Stealth Planetary Gearhead, P/N PX42-005, marked MTG: MX115-005-059, with 5:1 ratio. Label details: P/N: PX42-005.

The gearhead shows normal cosmetic wear from prior use, storage, and handling, including scratches, marks, surface residue visible in the photos. Whats included. Please review all photos carefully for exact condition and included parts. Only what is shown in the pictures included.

part #: px42005 price

• $299.96

specifications oelemot:

• brand: Stealth
• mpn: Px42-005
• country of origin: United States

returns oelemot:

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

payments oelemot:

• other
• credit card: Discover
• wallet: Paypal

offer oelemot:

• best offers: True
• options: Ship-to-home
• started: April 17, 2026
• availability: In Stock
• quantity: 1
• sold: 0

general oelemot:

• Industrial Automation Motion Controls > Electric Motors > General Purpose Motors
• condition: For parts or not working

shipping oelemot:

• class: Standard
• type: Calculated
• transit: 4-8 Days
• cost: $0.00
• carrier: FedEx
• service: FedEx Ground / FedEx Home Delivery

seller oelemot:

• rating: 100.0%
• city: Belle e, Pennsylvania
• # reviews: 3203

Stealth PX42-005 Is Similar To:

• Ps142-030 Ps142-030-lh Mt142-040-049 Parker Bayside Stealth Precision Inline 30 1 Planetary Servo Gearhead (33.3% similar) Less than 68DB noise fast. Never installed Stealth advanced PS is Parker bayside's highest performance servo gearhead. 6,000 rpm input speeds accurate. Over 97 efficiency full info available here. Parker motion. Less than 3 arc minutes backlash plus. With 8 frame sizes and 12 gear ratios, you are ...(September 10th, 2016)
• Stealth Ps90-030 Planetary Gearhead 30 1 Ratio Used (66.1% similar) Item is sold as pictured. The cost of combined shipping depends on weight, location buyer and size box. Prices for these options may differ from standard ground shipping. Ups 2 day air am. Ups next day am. Used, shaft is scratched, refer to pictures. These services include: ups 3 day select. Stealth...(June 29th, 2025)