Kaeser MOBILAIR M81 Towable Rotary Screw Air Compressor - 295 CFM, Diesel
Same frame and same four-outlet manifold as the M76, with a Hatz 4H50TICD instead of the Kubota and 25 more CFM at 100 psig. The Hatz is air-cooled, which takes a radiator and its failure modes out of the machine entirely - worth the difference on rental units and anywhere service intervals get stretched. Same 100 to 200 psig selectable range.
Same frame and same four-outlet manifold as the M76, with a Hatz 4H50TICD instead of the Kubota and 25 more CFM at 100 psig. The Hatz is air-cooled, which takes a radiator and its failure modes out of the machine entirely - worth the difference on rental units and anywhere service intervals get stretched. Same 100 to 200 psig selectable range.
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 | M81 |
|---|---|
| Free air delivery | 295 CFM @ 100 psig |
| Engine | Hatz 4H50TICD Tier 4 Final |
| Fuel | Diesel |
| Brake horsepower | 65 BHP @ full load |
| Full load speed | 2600 rpm |
| Off load speed | 1800 rpm |
| Drive type | Gear |
| Fuel tank capacity | 34.3 gal |
| Air discharge outlets | 3 x 3/4" + 1 x 1-1/2" NPTF |
| Dimensions (L x W x H) | 152 x 68 x 61 in. (towbar) |
| Shipping weight | 2,751 lb (approx.) |
| Sound level | 76 dB(A) max at 23 ft |
| Mounting | Towable |
Free air delivery by pressure
| Pressure | Delivery |
|---|---|
| 100 psig | 295 CFM |
| 150 psig | 240 CFM |
| 200 psig | 190 CFM |
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 | Standard - no aftercooler or 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 200 psig or 100 psig or 125 psig or 150 psig |
| Mounting | Towable (standard) or Skid mounted or Stationary (anti-vibration pads) |