Kaeser MOBILAIR M125 Towable Rotary Screw Air Compressor - 405 CFM, Diesel
Kaeser MOBILAIR M125 — 405 CFM @ 125 psig, Deutz TCD 4.1 L04 Tier 4 Final, 121 BHP, 45 gal tank.
The M125 is the flexible one in the powerhouse class: dynamic flow rate regulation gives it a continuous 100 to 200 psig range instead of a few fixed steps, and it holds a full 405 CFM all the way from 125 to 145 psig before it starts to taper. One machine covers work that would otherwise need a 100 psig unit and a high-pressure unit. Stock units ship with the aftercooler and centrifugal separator fitted.
Every MOBILAIR shares the same core engineering. The large, slow-turning SIGMA PROFILE® airend delivers 15–20% more air per gallon of fuel than comparable units, which is the single biggest line item over a machine's life. The anti-frost valve holds discharge air temperature high enough that ambient moisture will not freeze in the tool, protecting air motors and extending tool service life. Heavy-duty chassis and canopy resist corrosion; package airflow is routed to keep the engine cool under load; and the cold-start battery means the unit turns over in winter. Towable models ride on torsion bar suspension with even weight distribution.
Specifications
| Model | M125 |
|---|---|
| Free air delivery | 405 CFM @ 125 psig |
| Engine | Deutz TCD 4.1 L04 Tier 4 Final |
| Fuel | Diesel |
| Brake horsepower | 121 BHP @ full load |
| Full load speed | 1950 - 2200 rpm |
| Off load speed | 1500 rpm |
| Drive type | Gear |
| Fuel tank capacity | 45 gal |
| Air discharge outlets | 3 x 3/4" + 1 x 2" NPTF |
| Dimensions (L x W x H) | 188 x 74 x 68 in. (towbar) |
| Shipping weight | 4,453 lb (approx.) |
| Sound level | 76 dB(A) max at 23 ft |
| Mounting | Towable |
Free air delivery by pressure
| Pressure | Delivery |
|---|---|
| 125 psig | 405 CFM |
| 145 psig | 405 CFM |
| 175 psig | 380 CFM |
| 205 psig | 342 CFM |
Note: Kaeser stocks this model with the aftercooler / centrifugal separator fitted. The listed price includes that package.
Specifications from the Kaeser MOBILAIR price list effective 07-01-26 and the USMOBILAIR brochure 01/26. EX WORKS shipping point. Prices and specifications subject to change without notice.
Specifications
| Air Treatment Package | Aftercooler + centrifugal separator or Aftercooler + separator + filter or Aftercooler + separator + heater or Aftercooler + separator + heater + filter |
| Cold Weather Package | Standard ambient or Low temperature package (min. ambient -13 °F) |
| Discharge Pressure | Standard pressure or 100 - 200 (dynamic flow rate regulation) |
| Mounting | Towable (standard) or Skid mounted or Stationary (anti-vibration pads) |