Abovedeck Piston




Our flagship air compressor just got better!

The Boss BA435 has now grown up to the BA440, and puts out 40cfm @ 100psig!

At the heart of the system is an aluminum, single stage, V4, pressure lubricated reciprocating air compressor. Fully assembled in the U.S., the aluminum compressor assembly offers lighter weight and higher thermal efficiency than cast iron compressor assemblies. The BA440 includes an internal oil pump for increased lubrication over that of splash lubrication compressors.

The compressor is direct coupled to a 12 GPM gear-type hydraulic driven motor, no need to replace and tension belts when time is of the essence!

Routine maintenance items are accessible without the removal of the canopy.

The 200 lbs dry weight of the BA440 is half that of competitive brands due to the aluminum compressor, enclosure and small footprint. The aluminum enclosure not only reduces weight, but also is rust resistant.

Also, included standard with the Boss BA440 are an integrated hydraulic system cooler, integrated solenoid and relief valve, 12 VDC fan assembly, heavy-duty filtration and one-year warranty for the compressor assembly.

The BA440 will serve as a direct replacement unit for those already in the field. No need to modify existing equipment or stock additional replacement parts.

You know the product because you have used it for years. Now come to know the company that produced and supported it, Boss Industries.


TypeSingle-stage, 4-cylinder piston
Delivery40 cfm @ 100 psig (150 psig max) @ 1650 rpm
Duty CycleIntermittent
Power SourceHydraulic motor
Displacement44 cfm*
Fan Diameter14.125"
Hydraulic Flow @ 1650 RPM12 gpm
Hydraulic Pressure2,100 psig (2400 psig max)
Ambient Air Temp.-20° to 100° F
Max. Operating Slope20°
Hydraulic SystemOpen center
Reservoir Requirement12 gal. minimum (plus other hydraulic equipment manufactures requirements)
LubricationPressure lube
Oil Capacity1.33 qts
Electrical12VDC standard (24VDC optional)
Hydraulic System CoolerIncluded as standard (compressor hydraulic cooling only)
Dimensions26.5" L x 19.125" H x 19.75" W**
EnclosurePowder-coated aluminum
Weight180 lbs (dry)
Warranty18 months


* At 1650rpm

** Add 2.625" to height for air filter cap.