Atlas Copco 1616711781 Oil-Free Rotary Tooth Air End
1616711781 Oil-Free Rotary Tooth Air End
Product Description
The 1616711781 is the oil-free rotary tooth air end that drives the compression stage in Atlas Copco ZT-series compressors. It sits at the heart of the machine, turning drive power into clean, oil-free air. Because the chamber carries no oil, the air stays safe for food, pharma, and electronics use.
About the 1616711781 Oil-Free Air End
An air end is the part that actually compresses the air. The 1616711781 uses rotary tooth technology, a design built around two intermeshing rotors with conjugate profiles. The rotors turn inside a fixed housing and trap air between their lobes and the casing wall. As they spin, the trapped volume shrinks and the air leaves at higher pressure.
Rotary tooth compressors keep the compression chamber oil-free. Oil still lubricates the timing gears and bearings, but it never touches the air path. That single detail is why the 1616711781 suits plants where even a trace of oil ruins the product or the process.
This air end belongs to the Atlas Copco ZT family of oil-free rotary tooth compressors. Machines in that range serve industries that demand ISO 8573-1 Class 0 oil-free air, from bottle blowing to semiconductor lines. The stage is the pressure-making core, so its condition sets the output quality of the whole compressor.
How the Rotary Tooth Stage Works
The stage relies on two rotors that never touch each other. A set of timing gears keeps them perfectly synchronised and holds a tight, constant clearance. Air enters at the inlet port and is sealed between a rotor lobe and the bore.
As the rotors turn, the pocket of air moves along the housing and shrinks. Pressure climbs without any oil film to seal or cool the chamber. Cooling comes from the mass of the rotors and the airstream itself, plus the aftercooler downstream. The result is air delivered with no oil aerosol and no oil vapour.
The rotors float on their own clearances. That is why the build quality of the 1616711781 matters. It decides how tight the clearance stays over years of running, and tight clearance is what keeps the stage efficient.
Technical Specifications
The table below lists the confirmed identity of the 1616711781. These are fixed attributes you can use to match the part before ordering.
| Attribute | Detail |
|---|---|
| Part number | 1616711781 |
| Brand | Atlas Copco |
| Product type | Oil-free rotary tooth air end (compression module) |
| Technology | Oil-free rotary tooth (conjugate two-rotor stage) |
| Compressor series | Atlas Copco ZT-series oil-free rotary tooth compressors |
| Function | Compresses inlet air with no oil in the chamber |
| Air quality | ISO 8573-1 Class 0 oil-free output |
For fitment on a specific machine, check the model tag and serial number on the compressor nameplate. They point to the correct air end. Send those details and we will confirm the match against the parts list.
Installation and Care for the 1616711781 Air End
FAQ
More Parts List
If you need other Atlas Copco air compressor parts, we provide more models in the table below or you can submit your requirements to us directly.
| Part Number | Part Name | Part-Number |
| 1616770790 | OIS F-12 (C55* VSD+) | 1616-7707-90 |
| 1616772590 | OIS I-04 (C80 VSD+) | 1616-7725-90 |
| 1616037600 | SEGMENT DE COMPRESSION | 1616-0376-00 |
| 1616225300 | RIM | 1616-2253-00 |
| 1616236300 | STOP DEVICE | 1616-2363-00 |
| 1616277000 | TRAY | 1616-2770-00 |
| 1616447100 | BRUSH | 1616-4471-00 |
| 1616460100 | PROTECTION | 1616-4601-00 |
| 1616465700 | PROTECTION | 1616-4657-00 |
| 1616495900 | BRUSH | 1616-4959-00 |
| 1616510490 | RECIEVER-AIR | 1616-5104-90 |
| 1616515683 | DRAWBAR ASY | 1616-5156-83 |
| 1616541900 | PARALLEL KEY | 1616-5419-00 |
| 1616550181 | O.F.T. K-01 | 1616-5501-81 |
| 1616557400 | KEY | 1616-5574-00 |
| 1616557600 | KEY | 1616-5576-00 |
| 1616577381 | OIS F-06/COMP.EL/GAR 5-14/WCO | 1616-5773-81 |
| 1616578982 | O.I.S. H-03 5 | 1616-5789-82 |
| 1616580381 | O.F.S. K-21 | 1616-5803-81 |
| 1616580383 | O.F.S. K-23 | 1616-5803-83 |
| 1616585181 | O.F.S. G-21 | 1616-5851-81 |
| 1616585182 | O.F.S. G-22 | 1616-5851-82 |
| 1616585183 | O.F.S. G-23 | 1616-5851-83 |
| 1616589181 | STAGE | 1616-5891-81 |
| 1616590463 | O.F.S. M-26 | 1616-5904-63 |
| 1616590481 | O.F.S. M-21 | 1616-5904-81 |
| 1616590482 | O.F.S. M-22 | 1616-5904-82 |
| 1616590483 | O.F.S. M-23 | 1616-5904-83 |
| 1616610900 | KEY | 1616-6109-00 |
| 1616612406 | TO CHANGE (NEEDED FOR STOP DN | 1616-6124-06 |
| 1616623000 | KEY | 1616-6230-00 |
| 1616629400 | KEY | 1616-6294-00 |
| 1616629500 | KEY | 1616-6295-00 |
| 1616629600 | KEY | 1616-6296-00 |
| 1616630581 | O.F.S. O-21 | 1616-6305-81 |
| 1616630582 | O.F.S. O-22 | 1616-6305-82 |
| 1616630589 | OFS O-29 | 1616-6305-89 |
| 1616635681 | O.F.S. Q-21 | 1616-6356-81 |
| 1616635683 | STAGE 6 GAS | 1616-6356-83 |
| 1616635689 | OFS Q-29 | 1616-6356-89 |
| 1616652781 | O.F.T. I-01 | 1616-6527-81 |
| 1616655190 | SERV. ELEM. O.I.S. M | 1616-6551-90 |
| 1616657590 | SERV.STAGE GAR5-14BP | 1616-6575-90 |
| 1616657593 | OIS F-05(C55) | 1616-6575-93 |
| 1616677082 | O.F.S. E-22 | 1616-6770-82 |
| 1616679288 | O.F.S. I-48 | 1616-6792-88 |
| 1616710390 | SERV.STAGE GX2-5C OIS D-11(C40 | 1616-7103-90 |
| 1616714691 | OIS M-06 (C146) | 1616-7146-91 |
| 1616716187 | O.F.S. O-27 | 1616-7161-87 |
| 1616716287 | O.F.S. Q-27 | 1616-7162-87 |
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