Atlas Copco 1616728190=1616728180 C111 Air End for GA37⁺ to GA75 Compressors
C111 Air End for GA37⁺ to GA75 Compressors
Product Description
The Atlas Copco 1616728190 is a genuine C111 rotary screw air end. It is built for the oil-injected GA37⁺, GA45⁺, GA55⁺ and GA75 compressor packages. This component forms the compression core of the machine. It draws in air and compresses it through two meshing rotors inside a sealed housing.
A well-maintained air end protects the whole compressor. It sets the upper limit on output, efficiency and service life. When the element wears, the entire package loses performance. Replacing it with a genuine part restores the original design capability.
Product Identity
The C111 is a belt-driven screw element with an integrated reduction gearbox. Atlas Copco assigns the C111 code to this specific rotor and housing family. The 1616728190 identifies the current production version of this air end. Its former part number is 1616728180. Both numbers refer to the same C111 element for the same compressor models.
Application Range
This air end covers the 37 to 75 kW motor band. It serves four GA models in the plus (⁺) series: GA37⁺, GA45⁺, GA55⁺ and GA75. These are fixed-speed and VSD compressors used across workshops, plants and utilities. Always confirm the part number on the compressor nameplate before ordering.
Belt-Drive with Gearbox
The C111 uses belt drive rather than direct coupling. A built-in gearbox steps the motor speed down to the rotor speed. The gear action offsets the axial thrust on the male rotor. This reduces bearing load and helps keep running temperature lower than a direct-drive layout would allow.
Technical Specifications
Physical and Mechanical Data
The air end uses a cast iron housing for rigidity under pressure. The rotors run on imported SKF bearings selected for long service life. The SAP profile gives equal-diameter male and female rotors with a 4/6 tooth combination. This geometry keeps the female rotor stiff and limits internal leakage.
| Parameter | Specification |
|---|---|
| Part number | 1616728190 (former: 1616728180) |
| Element model | C111 |
| Product type | Rotary screw air end (oil-injected) |
| Drive mode | Belt drive with integrated gearbox |
| Housing material | Cast iron |
| Rotor profile | SAP, 4/6 tooth, equal diameter |
| Bearings | Imported SKF |
| Max. working pressure | 10 bar |
| Power range | 37–75 kW |
| Air displacement | ~10,000 L/min |
| Speed @ 8 bar | 2,960 RPM |
| Dimensions (L×W×H) | 800 × 600 × 600 mm |
| Weight | 260 kg |
| Noise level | 60–65 dB(A) |
| Compatible models | GA37⁺, GA45⁺, GA55⁺, GA75 |
Performance Range
The element is rated for a maximum working pressure of 10 bar. It supports motor powers from 37 kW up to 75 kW across the four GA models. Free air delivery scales with the host compressor. At 8 bar the rotor turns at about 2,960 RPM. These figures describe the element; the package output depends on the full compressor setup.
Working Principle
Common Wear Indicators
Output drops are the first sign of element wear. The compressor needs more power to deliver the same air. Discharge temperature rises and the unit runs longer to meet demand. Higher noise and vibration also point to bearing or rotor wear.
Oil carryover can increase as seals age. Unusual metal particles in the oil filter suggest internal wear. A rising specific energy value on the controller is an early warning that the element is losing efficiency.
Repair or Replace Decision
Minor bearing or seal wear can be rebuilt by a qualified service centre. A full overhaul restores clearances and replaces worn bearings. If the rotors are scored or the housing is damaged, replacement is the safer choice. A new genuine air end returns the machine to original performance with a known, documented condition.
Plan the work during a scheduled shutdown. Order the correct part number in advance and inspect the gearbox, couplings and piping while the air end is off. This avoids a second teardown and shortens total downtime.
Engineering and Materials
A genuine C111 air end is built to the original design geometry. The rotors are milled and finish-ground on five-axis CNC machines with CBN wheels. The cast iron housing holds tight tolerances under pressure. These choices protect the seal gaps that define efficiency.
The imported SKF bearings and proven seal package are matched to the rotor loads. Every part is selected so the assembly meets its rated life. This is the value of using the part Atlas Copco designed for the machine.
Manufacturing Precision
Genuine elements are produced under Atlas Copco quality control from raw material to finished unit. Each air end is validated as a complete assembly. Using the correct part keeps the compressor's service plans and performance claims intact. It also simplifies future maintenance because the fit and interfaces are identical to the original.
FAQ
More Air Ends List
If you need other Atlas Copco air compressor air ends, we provide more models in the table below or you can submit your requirements to us directly.
| Part Number | Part Name | Part-Number |
|---|---|---|
| 1627456145 | AIREND KIT | 1627-4561-45 |
| 1627456178 | AIREND KIT | 1627-4561-78 |
| 1627456179 | AIREND | 1627-4561-79 |
| 1627456181 | AIREND | 1627-4561-81 |
| 1627456195 | AIREND | 1627-4561-95 |
| 1627456198 | AIREND KIT | 1627-4561-98 |
| 1627456203 | AIREND | 1627-4562-03 |
| 1627456205 | AIREND KIT | 1627-4562-05 |
| 1627456206 | AIREND KIT | 1627-4562-06 |
| 1627456226 | AIREND KIT | 1627-4562-26 |
| 1627456235 | AIREND, FSS204098C | 1627-4562-35 |
| 1627456237 | AIREND KIT | 1627-4562-37 |
| 1627456241 | AIREND KIT | 1627-4562-41 |
| 1627456244 | AIREND, FSS204155S | 1627-4562-44 |
| 1627456247 | AIREND, FSS255112S | 1627-4562-47 |
| 1627456249 | AIREND KIT | 1627-4562-49 |
| 1627456250 | AIREND KIT | 1627-4562-50 |
| 1627456256 | AIREND KIT | 1627-4562-56 |
| 1627456294 | AIREND KIT | 1627-4562-94 |
| 1627456897 | AIREND KIT | 1627-4568-97 |
| 1639000036 | INLET PIPE AIREND | 1639-0000-36 |
| 2014501255 | AIREND, FSS255170S | 2014-5012-55 |
| 2014501265 | AIREND, QUINCY | 2014-5012-65 |
| 2014501570 | AIREND, FSS204102S | 2014-5015-70 |
| 2014502896 | AIREND, FSS204123S | 2014-5028-96 |
| 2204111200 | STIRRUP SUPP AIR END C55 DD | 2204-1112-00 |
| 2205178009 | AIR END OIL INFALL PIP | 2205-1780-09 |
| 2205178535 | AIR END OIL INFALL PIPE | 2205-1785-35 |
| 2205407400 | AIR END | 2205-4074-00 |
| 2205407500 | AIR END | 2205-4075-00 |
| 2205721584 | INLET, AIREND, 1 1/2+ | 2205-7215-84 |
| 2205721734 | INLET, AIREND, 1 1/2+ | 2205-7217-34 |
| 2205721774 | INLET, AIREND, 2+ | 2205-7217-74 |
| 2205721893 | GASKET, AIREND OUTLET | 2205-7218-93 |
| 2205722005 | AIREND, FSS255112S | 2205-7220-05 |
| 2205722006 | AIREND, FSS255105C | 2205-7220-06 |
| 2205722011 | AIREND – MOTOR, PLETY | 2205-7220-11 |
| 2205722175 | AIREND, VMX 160RD | 2205-7221-75 |
| 2205722253 | COMPENSATOR, PIPE, AIREND SIDE | 2205-7222-53 |
| 2205722296 | AIREND, FSS321114C | 2205-7222-96 |
| 2205722298 | FLANGE, AIREND-MOTOR, D800 | 2205-7222-98 |
| 2205722334 | INLET, AIREND, 1 1/2+ | 2205-7223-34 |
| 2205722340 | AIREND, FSS255134S | 2205-7223-40 |
| 2205722349 | COMPENSATOR, AIREND SIDE | 2205-7223-49 |
| 2205722444 | AIREND, FSS255170S | 2205-7224-44 |
| 2205722748 | AIREND OUTLET 1-1/2 FORM 30-37 | 2205-7227-48 |
| 2205722749 | AIREND OUTLET 1-1/2 FORM 45 | 2205-7227-49 |
| 2205722811 | INLET, AIREND, 2+ | 2205-7228-11 |
| 2205827263 | REFURBISH KIT, AIREND, 204-123 | 2205-8272-63 |
| 2205829521 | AIREND, EVO9 | 2205-8295-21 |
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