The Atlas Copco Outer Rotor Fan Motor MK137-4DK.10 stands as an essential component for maintaining the operational efficiency and extending the lifespan of Atlas Copco air compressors. This motor plays a crucial role within the compressor’s cooling system, effectively dissipating heat generated during operation, which is paramount for preventing overheating and ensuring consistent performance. Seadweer, a professional supplier recognized for its specialization in genuine Atlas Copco parts, offers this original component to meet the demands of industrial maintenance and procurement professionals. It is noteworthy that the designation “Ywf (K) 137-4D75 Mk137.4dk. 10. U Atlas Copco Air Compressor Spare Part Fan Motor for Atlas Copco Fans” appears in available resources. This closely related nomenclature suggests a potential alternative or full part number for the same product, indicating a possible interchangeability or a specific regional or application-based naming convention that users should be aware of when sourcing this critical component.
Contents
Advantages of Outer Rotor Motors in Air Compressor Fan Applications

Outer rotor motors represent a distinct category of electric motors where the rotor, the component housing the magnets, rotates around the stationary stator, which contains the electrical windings. This design contrasts with the more common inner rotor motor, where the rotor is positioned within the stator. In the context of fan motors for air compressors, outer rotor motors present several inherent advantages. Their design often allows for a more compact axial length for a comparable power output, which is beneficial in space-constrained industrial machinery. Furthermore, the external positioning of the rotor can lead to enhanced heat dissipation as the rotating component is directly exposed to the surrounding air, facilitating better cooling performance. Research indicates that outer rotor motors can deliver higher torque compared to inner rotor designs due to the potential for a greater number of magnetic poles and a larger magnetic field area. This increased torque capacity is particularly advantageous for fan applications requiring consistent and powerful airflow. While some studies suggest higher overall efficiency in certain types of outer rotor motors, such as EC motors , it is important to consider the specific application and motor technology when evaluating energy efficiency. The design of outer rotor motors can also contribute to quieter operation by minimizing vibrations, making them suitable for environments where noise levels are a concern. Additionally, these motors often offer versatility in mounting options, allowing for easier integration into various machinery configurations.
Specification of Outer Rotor Fan Motor MK137-4DK.10
The Atlas Copco Outer Rotor Fan Motor MK137-4DK.10, as provided by Seadweer, exhibits specific features that make it a suitable choice for its intended application.
Parameter | Specification |
Model Number | MK137-4DK.10 (YWF(K)137-4D75 MK137.4DK.10.U) |
Power Rating | 1.5KW (1500W) |
Speed | 960 RPM |
Diameter | 450mm |
Dimensions (L×W×H) | 600mm × 600mm × 400mm |
Construction Material | Metal |
Weight | 33kg |
Noise Level | 36dB(A) |
Application | Screw air compressors, Portable air compressors |
Power Range (Series) | 150-2100W (MK137 series) |
Typical Voltage* | 1~230V 50Hz or 3~230V/400V D/Y 50Hz |
Protection Class* | IP44 or IP54 |
Temperature Class | T3/T4 |
Seadweer – Reliable Quality & Expert Service
Acquiring the Atlas Copco Outer Rotor Fan Motor MK137-4DK.10 as a genuine, original product is paramount for ensuring the continued reliable operation of Atlas Copco air compressors. Seadweer stands as a professional supplier specializing in these authentic parts. Established in 2011, Chengdu Seadweer Air Compressor Co., Ltd. has a history of providing Atlas Copco air compressor components. With a team of 14 employees, Seadweer has demonstrated a commitment to supplying a wide range of air compressor parts, emphasizing competitive pricing and efficient delivery times, stocking over 10,000 components. Performance metrics from Alibaba.com indicate a high level of customer satisfaction with Seadweer, evidenced by a 99.74% response rate and a 100.0% on-time delivery rate across a significant volume of transactions. Furthermore, customer reviews on the platform average 4.8 out of 5 stars, highlighting the reliability and quality of service provided by Seadweer. Testimonials from customers underscore Seadweer’s specialization in air compressor spare parts for over 15 years, with the capability to supply components for various international brands, including Atlas Copco. This established history and positive customer feedback reinforce Seadweer’s position as a trustworthy source for genuine Atlas Copco parts.

To effectively distinguish the Atlas Copco Outer Rotor Fan Motor MK137-4DK.10 from other available fan motors, a comparison of key specifications is essential. While comprehensive data on every alternative model may not be readily available, examining similar motors within the same series or from the same manufacturer can provide valuable insights. For instance, Ziehl-Abegg offers a model MK137-4DK.15N, which is a synchronous external rotor fan with a power rating of 1.45kW. This motor shares a similar model number prefix but differs slightly in power, indicating variations within the MK137 series. Additionally, various “Atlas Copco Replacement” fan motors are listed by suppliers, suggesting a range of aftermarket options exist for different air compressor models. However, the specific technical parameters of these replacement motors may vary. The unique attributes of the MK137-4DK.10, such as its 1.5KW power rating, 960rpm speed, and specific dimensions, make it the designated component for particular Atlas Copco air compressor models. Choosing the correct, genuine part ensures optimal performance and compatibility within the integrated system.
The Atlas Copco Outer Rotor Fan Motor MK137-4DK.10 demonstrates compatibility with specific Atlas Copco air compressor models and series, as indicated by its application scope. The technical data explicitly states that this fan motor is designed for use with the GA30+, GA37, and GA145 series of Atlas Copco air compressors. The “+” symbol following GA30 likely denotes a range of models within that particular series. This compatibility information is critical for maintenance professionals and procurement specialists to ensure they are selecting the appropriate fan motor for their existing Atlas Copco equipment. The fact that this motor is compatible with multiple GA series models suggests its role as a standardized cooling component across a significant portion of Atlas Copco’s industrial air compressor line. The absence of other explicitly mentioned compatible models in the provided resources indicates that the GA30+-37-145 range represents the primary application for this specific fan motor variant.
Key Specifications & Installation Guidelines
The Atlas Copco Outer Rotor Fan Motor MK137-4DK.10 possesses a set of detailed technical specifications that are crucial for its proper application and maintenance. The motor’s model number is YWF(K)137-4D75 MK137.4DK.10.U, and it operates with a power of 1.5KW at a speed of 960 rpm. It has a diameter of 450mm and overall dimensions of 600mm in length, 600mm in width, and 400mm in height. The motor is constructed from metal and weighs 33Kg, producing a noise level of 36dB(A). Its application is specifically for screw air compressors and portable air compressors. While the exact voltage and frequency for this specific variant are not explicitly stated, the Ziehl-Abegg MK series motors generally operate on voltages such as 1~230V 50Hz or 3~230V/400V D/Y 50Hz. Similarly, the protection class is likely IP44 or IP54, typical for the MK series. The temperature class for the MK137 series is T3/T4. Regarding installation, general guidelines for centrifugal motorized impellers advise ensuring continuous contact between the protective conductor and the system’s earth connection, and verifying that the connection data aligns with the rating plate. However, for specific installation procedures for the MK137-4DK.10, it is imperative to refer to the product manual and consult a qualified technician to ensure safe and effective integration within the Atlas Copco air compressor system.
The wholesale pricing for the Atlas Copco Outer Rotor Fan Motor MK137-4DK.10 is available on major e-commerce platforms, providing potential buyers with a cost reference. According to Seadweer’s listing on Made-in-China.com, the price range for this motor is US$550.00 to US$650.00. This pricing information offers a benchmark for businesses and industrial users considering a purchase of this component. It is important to note that prices can fluctuate based on various factors, including order quantity, specific supplier terms, and prevailing market conditions. However, this range provides a general indication of the wholesale cost for the genuine Atlas Copco Outer Rotor Fan Motor MK137-4DK.10.
Frequently Asked Questions (FAQ)
Q: What are the primary advantages of using an outer rotor fan motor in an Atlas Copco air compressor?
A: Outer rotor motors offer benefits such as higher torque, enhanced cooling capabilities due to the external rotor design, and a compact form factor, making them well-suited for the demanding cooling requirements of air compressors.
Q: Which Atlas Copco air compressor models are compatible with the MK137-4DK.10 fan motor?
A: This fan motor is specifically designed for use with Atlas Copco GA30+, GA37, and GA145 series air compressors.
Q: How can I ensure I am purchasing a genuine Atlas Copco MK137-4DK.10 fan motor?
A: To ensure authenticity, it is recommended to purchase from reputable and professional suppliers specializing in Atlas Copco parts, such as Seadweer, who are recognized for providing genuine components.
Q: What are some common signs that an air compressor fan motor might be failing and need replacement?
A: Common indicators of a failing fan motor include unusual or loud noises during operation, the fan not spinning or rotating slowly, the air compressor overheating more frequently than usual, the presence of burning smells emanating from the motor area, or the fan failing to start or stop as expected.
Q: What are the key technical specifications of the Atlas Copco MK137-4DK.10 outer rotor fan motor?
A: Key specifications include a power rating of 1.5KW, an operating speed of 960 rpm, a motor diameter of 450mm, and overall dimensions of 600mm x 600mm x 400mm. The motor is constructed from metal and has a weight of approximately 33Kg.
In conclusion, the Atlas Copco Outer Rotor Fan Motor MK137-4DK.10 is a critical component for maintaining the optimal performance and reliability of specific Atlas Copco air compressor models. Its design as an outer rotor motor offers inherent advantages in terms of torque and cooling, making it well-suited for the demands of industrial air compression systems. Sourcing this genuine part from a trusted supplier like Seadweer ensures authenticity and compatibility, contributing to the longevity and efficient operation of the air compressor.
For further information, technical consultation, or to place an order for the Atlas Copco Outer Rotor Fan Motor MK137-4DK.10, we encourage you to contact Seadweer directly through their website or other provided contact channels. Their expertise and commitment to supplying genuine Atlas Copco parts make them a reliable partner for your industrial machinery needs.
Anonymous –
Highly recommended!
The Atlas Copco MK137-4DK.10 Outer Rotor Fan Motor perfect fit for Atlas Copco systems, this motor guarantees long-term reliability and peak performance. Highly recommended!