The Kaeser Mobilair M55 and M59 are towable diesel rotary-screw air compressors in the 185-195 CFM class the construction-site workhorse size for civil, demolition and pipeline crews running three or four pneumatic tools from one mobile circuit. The M55PE delivers 185 CFM at 100 PSI from a 43 hp Tier 4 Final Kubota D1803CR-T driving Kaeser’s SIGMA PROFILE airend.

This is the class that keeps a demolition crew’s paving breakers and rivet busters fed simultaneously, with surge headroom left over. Standard outlets accept crowsfoot, claw and quick-disconnect fittings, so a contractor air hose connects straight from the manifold; the M59 is the follow-on variant in the same family on the same chassis. Compare towable sizes across our diesel air compressors before you commit.

• M55PE: 185 CFM at 100 PSI from a 43 hp Kubota D1803CR-T diesel, EPA Tier 4 Final certified
• Direct-drive single-stage oil-injected rotary screw with Kaeser SIGMA PROFILE rotor geometry for more air per gallon
• Heavy-duty steel chassis with 15 in. wheels, rigid tow bar and standard pintle-eye towing; galvanized canopy for outdoor jobsite life
• M59 is the next-step variant in the same family, sharing chassis architecture and airend
• Extended service intervals; full-shift fuel capacity; onboard lockable tool box
• Runs two to four 50-CFM-class tools simultaneously the standard replacement for legacy 185 CFM machines
• Applications: civil multi-tool circuits, demolition, pipeline and utility trenching, moderate sandblasting and rental fleets
• Stocked by Crowder Supply in Denver with Kaeser service parts, hose whips, line oilers and regulators

Kaeser Mobilair M55/M59 FAQ

How many air tools will the M55 run at once?
At 185 CFM and 100 PSI, the M55PE keeps two to four 50-CFM-class tools breakers, rock drills, rivet busters fed simultaneously with surge headroom to spare.

What is the difference between the M55 and M59?
The M59 is the follow-on variant in the same Mobilair family, sharing the chassis architecture and SIGMA PROFILE airend; the M55PE carries the published 185 CFM at 100 PSI rating. Contact us to match the current configuration to your spec.

What engine is in the M55PE?
A 43 hp Kubota D1803CR-T diesel, EPA Tier 4 Final certified, direct-driving the single-stage oil-injected rotary-screw airend.

Is a 185 CFM towable the right size for my crew?
It is the standard replacement for legacy 185 CFM machines and the workhorse class for multi-tool civil and demolition circuits; the air compressor buyer’s guide walks through sizing by tool count and CFM.