Atlas Copco air compressors represent industry-leading reliability and performance. However, even the most robust equipment requires genuine replacement parts to maintain optimal operation. The Atlas Copco coupling 1604985900 serves as a critical component that connects the motor to the compressor head, ensuring smooth power transmission and operational efficiency.Professional supplier Seadweer provides authentic Atlas Copco parts, including this essential coupling component. Furthermore, selecting genuine parts guarantees compatibility, longevity, and maintains your equipment warranty. This comprehensive guide explores the coupling 1604985900, covering its specifications, installation, and benefits for your Atlas Copco air compressor system.

Contents
Product Overview and Significance
The coupling 1604985900 functions as the vital link between your compressor’s motor and compression element. Additionally, this precision-engineered component handles significant torque loads while accommodating minor misalignments between connected shafts. The genuine Atlas Copco design ensures perfect dimensional accuracy and material specifications that match your equipment’s requirements.
Professional maintenance teams recognize that coupling failure can lead to costly downtime and potential damage to connected components. Therefore, using authentic Atlas Copco parts becomes essential for maintaining system reliability. Moreover, genuine couplings undergo rigorous quality testing to meet Atlas Copco’s demanding performance standards.
Key Product Advantages
Genuine Atlas Copco coupling 1604985900 offers numerous benefits over aftermarket alternatives:
- Superior Material Quality: Manufactured using high-grade materials that withstand extreme operating conditions and temperature variations
- Precise Engineering: Exact dimensional specifications ensure perfect fit and optimal power transmission efficiency
- Extended Service Life: Advanced metallurgy and heat treatment processes significantly extend component lifespan
- Vibration Dampening: Engineered design reduces harmful vibrations that can damage connected equipment
- Warranty Protection: Genuine parts maintain your Atlas Copco equipment warranty coverage
- Cost-Effective Operation: Reduced maintenance frequency and extended service intervals lower total ownership costs
- Professional Support: Access to Atlas Copco’s technical expertise and comprehensive documentation
Genuine vs Alternative Products Comparison
Feature | Genuine Atlas Copco 1604985900 | Alternative Products |
Material Quality | Premium grade steel with specialized heat treatment | Standard materials, variable quality |
Dimensional Accuracy | ±0.02mm tolerance | ±0.1mm or greater tolerance |
Service Life | 8,000-12,000 operating hours | 3,000-6,000 operating hours |
Vibration Dampening | Advanced design reduces 85% of harmful vibrations | Basic design, limited vibration control |
Warranty Coverage | Full equipment warranty maintained | May void equipment warranty |
Technical Support | Complete Atlas Copco support network | Limited or no technical support |
Availability | Global supply chain ensures consistent availability | Inconsistent supply, potential delays |
Compatible Air Compressor Models
The coupling 1604985900 fits specific Atlas Copco air compressor series and models:
Series | Compatible Models | Application Type |
GA Series | GA11, GA15, GA18, GA22 | Fixed speed rotary screw compressors |
GX Series | GX11, GX15, GX18 | Premium efficiency compressors |
G Series | G11, G15, G18, G22 | Industrial rotary screw compressors |
GLS Series | GLS11, GLS15, GLS18 | Lubricated screw compressors |
GXS Series | GXS11, GXS15, GXS18 | High-efficiency industrial compressors |
Technical Specifications
Parameter | Specification | Unit |
Part Number | 1604985900 | – |
Material | High-strength alloy steel | – |
Maximum Torque | 450 | Nm |
Operating Temperature | -40 to +120 | °C |
Shaft Diameter (Motor Side) | 38 | mm |
Shaft Diameter (Compressor Side) | 42 | mm |
Overall Length | 185 | mm |
Weight | 2.8 | kg |
Misalignment Tolerance | ±2° angular, ±0.5mm parallel | – |
Service Life | 10,000 | hours |
Installation Procedure
Proper installation ensures optimal performance and extends component life. Follow these essential steps:
Step 1: Safety Preparation
Disconnect electrical power and relieve all system pressure. Additionally, ensure the compressor has cooled to ambient temperature before beginning work.
Step 2: Component Removal
Remove the coupling guard and existing coupling assembly. Subsequently, clean all mounting surfaces thoroughly to remove debris and old lubricants.
Step 3: Shaft Alignment Check
Verify motor and compressor shaft alignment using precision measurement tools. Furthermore, correct any misalignment before installing the new coupling.
Step 4: Coupling Installation
Install the new coupling 1604985900 according to Atlas Copco specifications. Moreover, apply appropriate thread-locking compound to securing bolts as specified.
Step 5: Torque Application
Tighten all fasteners to specified torque values using calibrated tools. Additionally, follow the recommended tightening sequence to ensure even stress distribution.
Step 6: Final Verification
Verify proper installation by checking coupling alignment and clearances. Subsequently, reinstall protective guards and restore electrical connections.
Step 7: Initial Operation
Start the compressor and monitor for unusual vibration or noise. Furthermore, allow the system to reach operating temperature while observing performance parameters.
Frequently Asked Questions
Q1: How often should I replace the coupling 1604985900?
A: Typically, genuine Atlas Copco couplings require replacement every 8,000-12,000 operating hours. However, actual service life depends on operating conditions, maintenance practices, and load factors.
Q2: Can I use aftermarket couplings instead of genuine Atlas Copco parts?
A: While aftermarket options exist, genuine parts ensure optimal performance and maintain warranty coverage. Additionally, authentic components provide 60% longer service life compared to alternatives.
Q3: What symptoms indicate coupling replacement is needed?
A: Common signs include increased vibration, unusual noise during operation, visible wear or damage, and excessive shaft misalignment. Moreover, regular inspection helps identify issues before failure occurs.
Q4: Does using genuine parts affect my compressor warranty?
A: Yes, genuine Atlas Copco parts maintain full warranty coverage. Conversely, aftermarket components may void warranty protection and limit technical support availability.
Q5: How can I verify part authenticity?
A: Genuine Atlas Copco parts feature specific markings, packaging, and documentation. Furthermore, purchasing from authorized suppliers like Seadweer ensures authenticity and quality assurance.
Conclusion
The genuine Atlas Copco coupling 1604985900 represents essential equipment for maintaining optimal compressor performance. Professional suppliers like Seadweer provide authentic components that ensure reliability, efficiency, and warranty protection. Furthermore, investing in genuine parts delivers superior long-term value through extended service life and reduced maintenance requirements.
Anonymous_Buyer –
Outstanding quality coupling!
Outstanding quality coupling! Replaced my worn Atlas Copco coupling 1604985900 and immediately noticed reduced vibration and smoother operation. The genuine part fits perfectly and installation was hassle-free. Genuine Atlas Copco parts make a real difference in reliability and performance.