Soon after, the factory was reconditioning engines, producing gears and building special purpose machines for the local glass industry.

The company grew rapidly after turning out its first reciprocating compressor in 1948, and by 1960 had outgrown its facility of 38 years and moved to a new location in Coburg, Germany.

Now represented in every major industrialized country in the world, Kaeser established its first subsidiary in Switzerland by the late 1970s.

When developing the Sigma Profile in the nineteen seventies, the Kaeser engineering team was faced with overcoming the disadvantages that previous screw designs presented to the market.

The design required closer tolerances between the rotors and the housing, resulting in fewer air back-flow losses.

Air-ends turning at slower speeds deliver more compressed air for the same drive power (up to 20% more efficient than conventional screw designs).