Atlas Copco 1616869383 C142 Permanent Magnet Air End
Product Overview
What the 1616869383 is
The Atlas Copco 1616869383 is a genuine C142 air end with a permanent-magnet rotor design. An air end is the compression element at the heart of a rotary screw compressor. It carries the twin rotors that draw in, trap and compress air before discharge. The C142 platform with a PM build means this unit is made for compressors driven by a variable-frequency, permanent-magnet motor.
This air end is the C142 permanent-magnet variant in Atlas Copco's air-end family. The family runs from smaller C-series cores up to large units, and each code marks a rotor size and drive type. The 1616869383 is supplied alongside companion part number 1616869393 as a matched set, not as a replacement chain.
Where it sits in the compressor
The air end sits between the inlet valve and the outlet port. The motor drives it through a coupling, and the compressed air leaves toward the aftercooler and the air receiver. Because the air end sets the machine's flow and pressure, its condition decides the whole compressor's output. A tired air end loses efficiency long before it stops, so the rotor group is the part most worth keeping to spec.
Technical Specifications
The table below lists the verified identity data for the 1616869383.
| Item | Specification |
|---|---|
| Part number | 1616869383 |
| Product type | Screw compressor air end (rotor group) |
| Air-end family | C142 |
| Build | Permanent magnet (PM) variant |
| Companion part number | 1616869393 |
| Brand | Atlas Copco (genuine) |
The flow, pressure and speed rating of this air end are set by the host compressor model. The rotor group is selected to match a specific machine, so those details are confirmed at order rather than assumed. The checklist in the ordering section shows what to verify before you buy.
How a screw air end compresses air
A rotary screw air end uses two meshing rotors inside a precision bore. As they turn, the trapped air pocket shrinks along the rotors and the pressure rises. The rotors never touch; a thin oil film keeps the clearance and seals the path. At the end of the bore the compressed air passes to the outlet. The closer the rotor tolerance, the less back-leakage and the better the volume efficiency.
In an oil-injected screw air end, the oil does three jobs at once. It cools the compressed air, it seals the gap between the rotors and the housing, and it coats the bearings. That is why the oil system and the air end are tuned together by the maker. A fresh rotor group running on clean, correct oil keeps the discharge temperature low and the seal tight. Poor oil or a worn group lets the temperature climb and the efficiency fall.
The permanent-magnet advantage
A permanent-magnet air end is built for a PM variable-frequency drive. The rotor carries magnets instead of relying only on induction, so it holds high efficiency across the speed range. Paired with a VSD controller, the unit tracks air demand and avoids the losses of fixed-speed running. A fixed-speed machine spends much of its life either fully loaded or idling through a bypass, which wastes energy; a PM VSD unit slows the rotor to match the load and keeps the waste low. That is why a PM air end suits sites with a swinging load, where part-load efficiency matters most.
Typical applications
The 1616869383 serves Atlas Copco screw compressors that use a permanent-magnet, variable-frequency drive. These machines appear in general plant air, workshops and process lines that need steady pressure with good part-load economy. The exact host model is confirmed through the pre-order checklist. Any compressor that runs a PM VSD and needs the C142 core can use this air end once the fit is verified.
Installation, Maintenance and Troubleshooting
Installation and alignment
Fit the air end on a clean bench with the correct lifting gear. Align the coupling to the motor within the stated tolerance, and torque every bolt to the spec. A misaligned rotor group wears fast and leaks air at the seal faces. Check the inlet and outlet ports for damage before fitment, and renew the gaskets so the joints stay tight.
Maintenance and storage
Keep the air end in its sealed pack and store it in a dry place before fitment. A dented housing or a scored port can let air escape or seat poorly, so reject any unit that looks crushed on arrival. In service, follow the compressor's oil and filter schedule, because clean oil protects the rotors and bearings. A simple sight check at service helps set the right interval.
Failure symptoms
A worn air end shows first as a drop in delivered flow at the same pressure, then as a rise in discharge temperature. The motor may draw more current to hold the set point, and the noise or vibration level climbs. Left alone, the unit loses more output and can pass oil downstream. These signs mean the rotor group is due for change rather than a minor tune-up.
Genuine Quality and Ordering
Why choose the genuine air end
A genuine 1616869383 air end is built to the published spec and matched to the host line. The rotor profile, bearing set and housing are chosen for the compressor's duty, so the unit restores the original compression curve. Choosing the specified core also protects the machine's warranty and keeps the air system predictable through the service interval.
Pre-order checklist
| What to check | Why it matters |
|---|---|
| Host compressor model | Confirms the air end matches your exact machine |
| Pressure and flow class | Ensures the C142 core covers your duty |
| PM / VSD drive type | Matches the permanent-magnet rotor to the controller |
| Coupling and port dimensions | Sets a clean fit and leak-free joints |
FAQ
Related Compressor Components Available
In addition to Gearboxs, we supply a full range of compressor replacement parts and maintenance components for Atlas Copco systems and compatible equipment.
| Part Number | Part Name | Part-Number |
|---|---|---|
| 1901002721 | ASSEMBLY BACK CYL. HEAD D320HN | 1901-0027-21 |
| 1901002725 | BACK CYLINDER HEAD - ASSEMBLY | 1901-0027-25 |
| 1901002726 | HEAD END CYLINDER HEAD D140 | 1901-0027-26 |
| 1901002728 | BACK CYLINDER HEAD ASSEMBLY | 1901-0027-28 |
| 1901002731 | ASSEMBLY FRONT CYLINDER HEAD | 1901-0027-31 |
| 1901003738 | GASKET CYL/CYL.HEAD D.320 HN | 1901-0037-38 |
| 1901003834 | GASKET CYL./HEAD | 1901-0038-34 |
| 1901004167 | SHAFT OF CROSS HEAD | 1901-0041-67 |
| 1901004170 | Crosshead pin | 1901-0041-70 |
| 1901004750 | FRONT CYLINDER HEAD | 1901-0047-50 |
| 1901004751 | BACK CYLINDER HEAD | 1901-0047-51 |
| 1901004765 | FRONT CYLINDER HEAD | 1901-0047-65 |
| 1901006244 | CROSSHEAD SLIDE | 1901-0062-44 |
| 1901006247 | crosshead | 1901-0062-47 |
| 1901006298 | BACK CYLINDER HEAD | 1901-0062-98 |
| 1901006331 | FRONT HEAD ASSEMBLY | 1901-0063-31 |
| 1901006683 | ASSEMBLY HEAD END CYLINDER | 1901-0066-83 |
| 1901006720 | ASSEMBLY BACK END CYL.HEAD370 | 1901-0067-20 |
| 1901006723 | CRANK END CYLINDER HEAD D.370 | 1901-0067-23 |
| 1901006742 | BACK CYL. HEAD ASSEMBLY D.220 | 1901-0067-42 |
| 1901006759 | BACK CYLINDER HEAD D140 HN | 1901-0067-59 |
| 1901006762 | HEAD END CYLINDER HEAD | 1901-0067-62 |
| 1625428209 | POWER SWITCH | 1625-4282-09 |
| 1625428210 | POWER SWITCH | 1625-4282-10 |
| 1625428211 | POWER SWITCH | 1625-4282-11 |
| 1625521002 | SWITCH | 1625-5210-02 |
| 1625521004 | SWITCH VACUUM | 1625-5210-04 |
| 1625521005 | VACUUM SWITCH | 1625-5210-05 |
| 1625524300 | SWITCH VACUUM | 1625-5243-00 |
| 1625560783 | DOOR ASS'Y MAIN SWITCH VSD | 1625-5607-83 |
| 1625561183 | DOOR MAINSWITCH FS | 1625-5611-83 |
| 1625590990 | DOOR CUBICLE FS (MAIN SWITCH) | 1625-5909-90 |
| 1625701901 | MAIN SWITCH ASSEMBLY | 1625-7019-01 |
| 1625701902 | MAIN SWITCH ASSEMBLY | 1625-7019-02 |
| 1625701903 | MAIN SWITCH ASSEMBLY | 1625-7019-03 |
| 1625701905 | MAIN SWITCH ASSEMBLY | 1625-7019-05 |
| 1625701906 | MAIN SWITCH ASSEMBLY | 1625-7019-06 |
| 1625853200 | MAIN SWITCH | 1625-8532-00 |
| 1625853300 | MAIN SWITCH | 1625-8533-00 |
| 1627171400 | FAN SWITCH SUPPORT | 1627-1714-00 |
| 1627185200 | HIGH PRESSURE SWITCH R134A | 1627-1852-00 |
| 1627424288 | SWITCH BRACKET | 1627-4242-88 |
| 1627441009 | TEMPERATURE SWITCH | 1627-4410-09 |
| 1627441010 | TEMPERATURE SWITCH | 1627-4410-10 |
| 1627441011 | TEMPERATURE SWITCH | 1627-4410-11 |
| 1000389600 | DISC-VALVE | 1000-3896-00 |
| 1000396600 | VALVE SEAT | 1000-3966-00 |
| 1000400400 | VALVE SEAT | 1000-4004-00 |
| 1000403280 | VALVE-SUCTION | 1000-4032-80 |
| 1000403380 | VALVE-DELIVERY | 1000-4033-80 |
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