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Electric motors and E-machines

Together with you, we realize the drives of the future: GROB develops and builds machines and systems for the large-scale manufacture of stators and rotors. At our sites in Mindelheim and Turin, we are working on the various winding technologies for round and rectangular wires – depending on drive and motor size. The product range spans from stand-alone, semi-automatic machines through to fully automated turn-key systems for our customers from the automotive industry. Competence, quality and speed are the basis of our customized solutions and future developments. 

GROB supports its customers in each phase of the product development process – from simultaneous engineering and the construction of the first prototypes to the series production and the appropriate assembly line, tailored to your requirements and needs. 

Services for the e-machine sector


  • E-motor and e-axis assembly
    Fully automated turn-key systems, tailored to your specific needs 
  • Stator assembly
    Systems for the stator production with different winding technologies 
  • Rotor assembly
    Systems for the rotor production with proven technology
Winding technologies of GROB
Stator with Continuous Hairpin
Stator Production with Continuous Hairpin

The advantages of the continuous hairpin lie in the economic feasibility of high numbers of slots with large inside diameters. With this technology, the prefabricated wire mat is inserted into the stator, making small wire cross-sections easily manageable and eliminating the need for complex circuitry. GROB uses flat winding for continuous hairpin assembly. 

Stator with hairpin technology
Stator Production with Hairpin Technology

An innovative bending concept enables very high flexibility and a wide range of variants. By using preformed, open coil segments made of conductors with a rectangular cross-section (so-called hairpins) and the high degree of automation, this technology allows high-quality stators with the highest filling ratios to be manufactured. 

Stator with Insertion Technology
Stator Production with Insertion Technology

The advantage of the coil-inserting technology lies in a proven process. It is used in electric motors for all size and performance classes, from consumer goods to the automotive industry. GROB offers two methods for manufacturing stators using the insertion technique:


  • Flyer winding
  • Template-based winding 
Rotor with Needle Winding
Rotor Production with Needle Winding

Needle winding technology is a complex process for applying round wire for e.g. externally excited rotors. The advantages of this process are, on the one hand, the consistent performance of the rotor over its entire service life and, on the other hand, the possibility of control via copper packets.

What sets us apart:
checkboxIntegrated, sophisticated processes for your electric motor manufacture
checkboxSpecific systems for various winding technologies
checkboxModular and reliable system technology
checkboxExpert knowledge in prototype construction including feasibility analyses

Want to know more?

Contact us.