The traditional combine harvester factory of East Germany was taken over by Case IH in 1997. When Case IH came under the ownership of New Holland, the factory was decided to be closed at the end of 2004. However, there was a desire in Singwitz to continue the factory. The 50 years of experience in manufacturing plot combine harvesters was utilized to develop a new series of plot combines and small conventional combines. The plot combines were also introduced into the Zürn company's sales lineup in green color. In Eastern Europe, agricultural combines were marketed through the Zetor network.

The established company Hege Erntemaschinen Singwitz employed 120 people. The product range introduced in summer 2004 appeared under the name Hege-MDW or Hemas-MDW. Later the name settled as Hemas. There were three models. The smallest, Farmer 165, was mainly aimed at plot use. The Farmer 180 was a 3-walker combine with a 101-horsepower engine and a 2.4–3.6 meter cutting platform. The Farmer 220 was clearly a larger four-walker model. It had a 132 hp engine and a 3.0–4.2 meter cutting platform. The engines came from Perkins and the hydraulics from Sauer Danfoss. The final drive was hydrostatic. Most adjustments were mechanical, for example, the cutting platform reverse rotation was initially an optional extra.

The end of Hemas production remains unclear. The manufacture of plot combine harvesters continues, but the production of agricultural combine harvesters likely ended by the 2010s.

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