At bauma 2025, Bauer Maschinen presented the prototype of its electric cutter soil mixing (eCSM) technology. This enhancement of the established CSM method replaces the traditional hydraulic components with an electric drive system. “There is no comparable electrified diaphragm wall equipment currently on the market. With the eCSM, Bauer is positioning itself as the pioneer in this technology,” said Stefan Wegerer, project manager at Bauer Maschinen GmbH.

The successful test of the eCSM prototype marks an initial milestone in developing a fully electrified trench cutter. While hydraulic systems reach their technological limits, the electric drive technology delivers significant improvements in efficiency and performance. With this forward-thinking technology, Bauer aims to further expand its leading position in the area of soil mixing through innovative and sustainable solutions.

The eCSM system uses two electric motors that drive the mixing wheels with an optimal speed of 40 rpm to achieve uniform mixing quality even in difficult soil conditions. In the process, the soil is loosened and simultaneously mixed with cement slurry at the same time to create a homogeneous cut-off wall. Energy supply is delivered via power cable, while two frequency converters ensure precise control of the drives.

Another key advancement is the introduction of a digital mixing assistant. While equipment operators previously had to control all parameters manually, the system now automatically regulates the pulling speed. This ensures that the defined total quantity of cement is distributed uniformly over the entire trench length. Such a technique not only increases precision but also reduces error and optimises the construction process.

The next phase of development will focus on creating a robust overall system that is ready for use on sites. In the long run, Bauer aims to provide its customers with a fully electric solution that offers both ecological benefits and enhanced economic efficiency.

Image: Bauer Group