At the core of every high-performing screw air compressor lies the air end, the critical component responsible for compressing ambient air into usable pressure. Its precision and efficiency directly impact the compressor’s overall energy consumption and reliability. Among these vital units, the Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor represents a pinnacle of engineering, designed to deliver optimal performance for specific Atlas Copco compressor models. When your compressor’s air end requires repair or replacement due to wear, age, or malfunction, installing a genuine unit is not merely a preference; it is an absolute necessity. For businesses seeking this authentic, high-precision air end assembly, Seadweer stands as a professional and trusted supplier specializing in genuine Atlas Copco compressor parts. Consequently, choosing Seadweer ensures you acquire an air end manufactured to the exact specifications and uncompromising quality standards set by Atlas Copco.

Contents
- 1 The Heart of the System: Understanding the Air End’s Vital Role
- 2 Introducing the Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor
- 3 Key Features and Benefits of the Genuine 1616635681 OFS Q-21 Air End & Rotor
- 4 Seadweer : Your Trusted Source for Genuine 1616635681 OFS Q-21 Air End & Rotor
- 5 Genuine 1616635681 OFS Q-21 Air End & Rotor vs. Non-Genuine Alternatives
- 6 Representative Technical Specifications
- 7 Installation Steps
- 8 Frequently Asked Questions (FAQs)
- 9 Conclusion
- 10 Airend Matching Table
- 11 Inquiry Now
The Heart of the System: Understanding the Air End’s Vital Role
The air end acts as the compressor’s primary engine, literally driving the air compression process. Within its robust housing, precisely machined male and female rotors intermesh, drawing in air from the inlet and progressively reducing its volume, thereby increasing its pressure. This complex mechanical interaction, often aided by oil for sealing and cooling in oil-free designs, determines the compressor’s air delivery capacity and its energy efficiency. Any wear, misalignment, or damage to the rotors or their bearings significantly compromises performance, leads to increased power consumption, and eventually results in complete operational failure. Therefore, the air end’s health remains paramount for consistent air supply and cost-effective operation.
Introducing the Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor
The Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor is a complete, factory-calibrated assembly specifically designed for optimal integration into designated Atlas Copco oil-free screw compressors. This part number signifies a unit with precisely engineered rotor profiles (often asymmetrical for enhanced efficiency), high-quality bearings, and robust housing materials built to withstand continuous operation under demanding industrial conditions. The rotors undergo meticulous machining and balancing processes, ensuring smooth rotation and minimal vibration. Atlas Copco manufactures this air end with exceptional attention to detail, ensuring minimal internal leakage and maximum volumetric efficiency. As an authentic component, the 1616635681 OFS Q-21 air end restores the compressor’s original performance characteristics, including its designed air flow rate and energy efficiency.
Key Features and Benefits of the Genuine 1616635681 OFS Q-21 Air End & Rotor
Opting for the Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor provides a range of significant benefits that directly impact your compressor’s long-term performance and operational costs. Firstly, its precision-machined rotor profiles ensure optimal air compression, translating into higher air output for less energy input. This directly contributes to substantial electricity savings over the air end’s lifespan. Secondly, the use of superior materials and advanced manufacturing techniques results in exceptional durability and wear resistance, significantly extending the service life of the unit. Furthermore, the air end’s balanced rotors and high-quality bearings minimize vibration and noise, promoting smoother operation and reducing stress on other compressor components. Ultimately, investing in this genuine air end secures your compressor’s reliability and maximizes its operational efficiency.

Seadweer : Your Trusted Source for Genuine 1616635681 OFS Q-21 Air End & Rotor
When your compressor’s core component, the air end, requires replacement, selecting a trustworthy supplier is non-negotiable. Seadweer stands as a professional provider entirely dedicated to supplying genuine Atlas Copco air compressor parts. Their commitment to authenticity means every 1616635681 OFS Q-21 Air End & Rotor you acquire from them is a product manufactured to Atlas Copco’s exact engineering specifications and undergoes rigorous quality control. Purchasing from Seadweer helps eliminate the inherent risks associated with non-genuine air ends. These risks include imprecise rotor profiles, inferior bearing quality, or improper balancing, which can lead to rapid wear, catastrophic failure, and substantial downtime. Therefore, partnering with Seadweer provides unwavering confidence in the quality and reliability of this crucial compressor component.
Genuine 1616635681 OFS Q-21 Air End & Rotor vs. Non-Genuine Alternatives
Choosing the Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor over non-genuine alternatives is a critical decision that profoundly impacts your compressor’s performance, lifespan, and operational costs. Non-genuine air ends may offer a lower initial price, but their hidden costs often outweigh any perceived savings through reduced efficiency, increased maintenance, and potential damage to other expensive components.
Feature | Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor | Non-Genuine Alternatives |
Rotor Profile | Precisely engineered, asymmetrical for optimal efficiency | Often inferior or less efficient profiles |
Material Quality | High-grade, specialized alloys for durability | Inferior or inconsistent materials, prone to wear |
Bearing Precision | Factory-installed, high-precision, balanced bearings | Lower quality bearings, shorter lifespan |
Balancing | Meticulously balanced to minimize vibration | Often poorly balanced, causing excessive vibration |
Volumetric Efficiency | Optimized for maximum air output per kW | Lower efficiency, leading to higher energy consumption |
Lifespan | Engineered for extended operational life | Significantly shorter lifespan, rapid degradation |
Fit & Alignment | Perfect, seamless integration | May require modifications, causing stress or misalignment |
Warranty | Maintains equipment warranty (check terms) | Can void equipment warranty, no manufacturer support |
Reliability | Reduces risk of catastrophic failure | Higher risk of unexpected breakdown and costly repairs |
This comparison highlights that genuine air ends are the result of extensive research, development, and stringent quality control processes. Non-genuine parts, conversely, often fall short in critical areas, risking premature wear, increased energy consumption, and ultimately, a higher total cost of ownership due to accelerated component degradation and unexpected downtime.
Representative Technical Specifications
The Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor adheres to a specific set of highly precise technical parameters that define its performance capabilities, dimensions, and material composition. These specifications ensure it functions flawlessly within the compressor system and delivers the expected air output and efficiency. While the precise, detailed engineering specifications are proprietary to Atlas Copco, the table below outlines representative technical characteristics typical of a high-quality oil-free screw air end designed for industrial applications. These properties contribute directly to its efficiency, durability, and operational limits.
Parameter | Representative Characteristic / Value |
Rotor Type | Asymmetrical Screw Rotors (Male/Female) |
Lubrication Type | Oil-Flooded |
Number of Lobes | Typically 4/6 or 5/6 (male/female) |
Bearing Type | High-precision Roller/Ball Bearings |
Max Operating Pressure | Up to 13 bar (188 psi) or 14.5 bar (210 psi) |
Max Operating Speed | Specific RPM, matched to motor speed |
Air Flow Capacity | Designed for medium to high flow ranges (e.g., 8-15 m³/min or 300-600 CFM) |
Material (Rotors) | High-strength alloy steel (e.g., 20CrMnTi, 42CrMo) |
Housing Material | Cast Iron or Aluminum Alloy |
Cooling Method | Oil-cooled (integral to compression process) |
Note: These parameters are representative. The precise technical specifications for Atlas Copco 1616635681 OFS Q-21 Air End & Rotor are defined by Atlas Copco’s engineering for its specific application.
Installation Steps
Replacing an Atlas Copco 1616635681 OFS Q-21 Air End & Rotor is an extremely complex and highly specialized task. It requires extensive technical expertise, specialized tools, and strict adherence to safety protocols. Incorrect installation or misalignment can lead to immediate and catastrophic failure of the compressor, substantial damage, or severe safety risks. It is absolutely imperative that this procedure be performed only by highly qualified, certified compressor technicians or authorized service personnel.

General Installation Steps (Requires Specialized Expertise & Tools):
-
Critical Safety Protocols:
Crucially, ensure the compressor is fully de-energized, isolated from all power sources, and properly locked out/tagged out according to established safety procedures. Relieve all internal pressure from the system and allow components to cool completely. Drain all compressor oil.
-
Disassemble Surrounding Components:
Carefully remove all connecting pipes, hoses, electrical wiring, and structural components that impede access to the air end. This often includes removing the motor, oil separator tank, coolers, and control panels. Document every step, taking numerous photographs and labeling all connections.
-
Support and Remove Old Air End:
Use appropriate lifting equipment and slings to safely support the weight of the air end. Disconnect all remaining mounting bolts and carefully remove the old 1616635681 OFS Q-21 air end from the compressor frame.
-
Inspect Frame and Connections:
Thoroughly clean and inspect the compressor frame, motor coupling, and all connecting interfaces for any damage, wear, or debris. Address any issues before proceeding.
-
Prepare New Air End:
Unpack the new, Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor. Ensure all protective caps are removed and inspect the air end for any transit damage. Apply clean compressor oil to the rotor tips and seals as required by the manual.
-
Install New Air End:
Carefully lower the new air end into position on the compressor frame using lifting equipment. Align it precisely with the motor coupling and mounting points. Secure all mounting bolts to the specified torque values, following a strict tightening sequence.
-
Align and Connect:
Reconnect the motor to the air end, ensuring precise coupling alignment. Reconnect all oil lines, air inlet/outlet piping, and sensor wiring. Replace all gaskets and seals with new, genuine parts during reassembly.
-
Lubrication and Pre-Checks:
Refill the compressor with the correct type and quantity of genuine Atlas Copco compressor oil. Perform a thorough pre-start inspection, manually rotating the air end (if possible) to ensure smooth movement.
-
Commissioning and Testing:
Restore power to the compressor. Perform a controlled initial startup and commissioning procedure as per the manufacturer’s manual. Monitor all parameters (pressure, temperature, vibration, noise) meticulously during initial operation. Conduct a leak test.
Disclaimer: This guide is a simplified overview. Replacement of an Atlas Copco compressor air end is an extremely complex procedure requiring specialized tools, precise measurements, factory-level expertise, and extensive technical training. It must only be performed by certified and authorized Atlas Copco service technicians following all manufacturer guidelines and safety regulations. Attempting this without proper training can result in severe injury, catastrophic equipment damage, and voided warranties.
Frequently Asked Questions (FAQs)
Q1: What is the Atlas Copco 1616635681 OFS Q-21 Air End & Rotor?
A1: This is the core compression element of an Atlas Copco oil-free screw compressor, containing precisely intermeshing rotors that compress air. It forms the heart of the compressor’s air generation system.
Q2: Why is it crucial to use a genuine 1616635681 OFS Q-21 Air End?
A2: A genuine air end guarantees precise rotor profiles, high efficiency, durable materials, correct balancing, and a perfect fit. These factors ensure optimal energy consumption, reliability, extended lifespan, and maintain your compressor’s warranty.
Q3: Which Atlas Copco compressor models are compatible with this air end?
A3: The 1616635681 OFS Q-21 Air End is compatible with specific models within Atlas Copco’s medium to large GA, GA VSD, and certain G series oil-free screw compressors. Always verify compatibility using your compressor’s serial number.
Q4: Can I install the air end myself?
A4: Absolutely not. Replacing a compressor air end is an extremely complex and specialized procedure requiring highly trained, certified technicians, specialized tools, and precise alignment. Incorrect installation can cause catastrophic damage and poses severe safety risks.
Q5: How does a genuine air end improve energy efficiency?
A5: Genuine Atlas Copco air ends feature optimized rotor profiles and precision manufacturing that minimize internal air leakage and friction. This design ensures maximum air output for every unit of energy consumed, leading to significant electricity savings.
Conclusion
The Genuine Atlas Copco 1616635681 OFS Q-21 Air End & Rotor stands as the indispensable heart of your compressor, driving its performance, efficiency, and reliability. Investing in this authentic, precision-engineered component ensures your compressor operates at its peak, delivering consistent air output with optimal energy consumption. By choosing a professional air compressor supplier like Seadweer, you guarantee the authenticity and uncompromising quality of this critical assembly, safeguarding your investment and securing the long-term health of your air compression system. Trusting genuine parts for the very core of your machine ultimately translates to maximum uptime and superior operational value.
Airend Matching Table
Brand | PN | NEW PN | Application | Motor Model NO. | Drive Mode |
AtlasCopco | 2989015800 | 2989015800=1616646680 | GA30-45+50VSD | K25 | |
AtlasCopco | 1616738280 | 1616738290 | GA18 ,GA26VSD+,GA22,GA26,GA30 | OIS I-01 C90 | Belt Driven |
1616738291 | |||||
AtlasCopco | 1616714681 | 1616714682-1616714692 | XAXS600/LUY160-17 | C146 | Direct Driven |
AtlasCopco | 1616706682 | 1616706690 | G110.G132,G160,G200,G250,GA110,GA132,GA160,GA200,GA250 | C242 | |
1616706692 | |||||
AtlasCopco | 1616646680 | 2989015800 | GA30-45+50VSD | C106 | Belt Driven |
AtlasCopco | 1616578982 | 2989015401 | GA55+,GA75,GA90,GA110 | C77-C90 | Direct Driven |
AtlasCopco | 2236050100 | 2236050200 | GX1-2 | ATSL-165E | Belt Driven |
AtlasCopco | 1616765180 | 1616765190 | C80 | Belt Driven | |
AtlasCopco | 1616761280 | 1616761290 | XRVS1000 | C146 | Belt Driven |
AtlasCopco | 1616757780 | 1616757790 | LU30-45 | C90 | Belt Driven |
AtlasCopco | 1616757580 | 1616757590 | GA355-GA500 | C242 (New) | Direct Driven |
AtlasCopco | 1616754080 | 1616754090 | GA355-500 | C242 | Direct Driven |
AtlasCopco | 1616753582 | 1616753592 | C55 F09 | ||
AtlasCopco | 1616753580 | 1616753590 | C55 F09 | Belt Driven | |
AtlasCopco | 1616679281 | 1616747281 | ZR/ZT | C242 (New) | Direct Driven |
AtlasCopco | 1616740980 | 1616740990 | GA110-GA132 | C146 | Direct Driven |
AtlasCopco | 1616740881 | 1616740891 | C111 | Belt Driven | |
AtlasCopco | 1616734582 | 1616734592 | G110.G132,G160,G200,G250,GA110,GA132,GA160,GA200,GA250 | C190 | Direct Driven |
AtlasCopco | 1616734581 | 1616734591 | G110.G132,G160,G200,G250,GA110,GA132,GA160GA200 GA250 BLT160-275 | C190 | |
AtlasCopco | 1616728180 | 1616728190 | GA37+GA75 | C111 | Belt Driven |
AtlasCopco | 1616727181 | 1616727381 | Element HPT2 | ||
AtlasCopco | 1616725880 | 1616725890 | |||
AtlasCopco | 1616725781 | 1616725791 | OIS-N-02 | ||
AtlasCopco | 1616528881 | 1616725691 | GA132 | C168 | |
AtlasCopco | 1616725681 | 1616725691 | GA110/GA1320 /GA160/GA200/GA250/GA315 | C168 | Direct Driven |
AtlasCopco | 1616719480 | 1616719490 | XAS97-185 | K-38 | Direct Driven |
AtlasCopco | 1616714683 | 1616714693 | GA55+-75+-90/GA90VSD | 0IS-C146 | Belt Driven |
AtlasCopco | 1616710380 | 1616710390 | GX2-5 | OLS D-11 C40 | Belt Driven |
AtlasCopco | 1616671280 | 1616671290 | GA 15、GA 18、GA 22,etc | OIS H-06 | |
AtlasCopco | 1616657583 | 1616657593 | GA5-GA11C | 0IS F-05 C55 | Belt Driven |
AtlasCopco | 1616626081 | 1616626090 | Drive Mode | ||
AtlasCopco | 1616580381 | ZR400VSD,ZR500VSD,etc | OFS K-21 | ||
AtlasCopco | 1616590481 | ZR/ZT250 | OFS M-21 | ||
AtlasCopco | 1616585181 | ZR/ZT 90-160VSD | OFS G-21 | ||
AtlasCopco | 1616585187 | ZR/ZT | OFS G-27 | ||
AtlasCopco | 2989015900 | XRVS1000 | C106 | Belt Driven | |
AtlasCopco | 1616741883 | SF6+ | Belt Driven | ||
AtlasCopco | 1616734580 | GA160 | |||
AtlasCopco | 1616528850 | GA110,GA132,GA160 | C168 | ||
AtlasCopco | 1616547081 | ||||
AtlasCopco | 1616555101 | ||||
AtlasCopco | 1616590482 | ||||
AtlasCopco | 1616601080 | ||||
AtlasCopco | 1616635681 | OFS Q-21 | |||
AtlasCopco | 1616651280 | ||||
AtlasCopco | 1616651283 | ||||
AtlasCopco | 1616657380 | ||||
AtlasCopco | 1616657580 | ||||
AtlasCopco | 1616657590 | ||||
AtlasCopco | 1616677081 | OFS E-21 | |||
AtlasCopco | 1616710781 HP | ||||
1616711781 LP | |||||
AtlasCopco | 1616719490 | ||||
AtlasCopco | 1616724890 | C106 OMCO | |||
AtlasCopco | 1616725790 | ||||
AtlasCopco | 1616734590 | ||||
AtlasCopco | 1616747590 | ||||
AtlasCopco | 1616772590 | ||||
AtlasCopco | 1616774591 | C67 | Belt Driven | ||
2236050000 | ATSL-140 | Belt Driven | |||
AtlasCopco | 2989012200 | ||||
AtlasCopco | 2989014400 | ||||
AtlasCopco | 2989014500 | ||||
AtlasCopco | 2989015401 | ||||
AtlasCopco | 2989015700 |
Anonymous_Buyer –
well worth the money!
Replaced our faulty airend with this original AtlasCopco 1616635681 OFS Q-21 airend and it works flawlessly! After over 2000 hours of operation, vibration levels have dropped by 35% and energy efficiency has increased by 12%. The Atlas Copco precision engineering is evident and the performance increase is well worth the money!