TMB+ Torque Motors

After decades of worldwide presence in the machine tool industry with leading edge Torque Motors, ETEL is presenting the new TMB+ motor. TMB+ is an evolution of the renowned TMB Torque Motor that provides a combination of increased performance and new features while maintaining the interfaces of existing motors. In fact, the torque density of TMB+ is increased by up to 20% while keeping the exact same footprint and reducing the power losses by up to 30%. Speed range is also significantly extended. TMB+ is enabling enhanced machine performance and allowing new process to be achieved into existing machines without any design change efforts. With its outstanding performance level, TMB+ will give access to direct drive technology to more applications while keeping quality and reliability at their highest level and reducing cost of ownership.

TMB+ vs. TMB

  • Continuous torque increased by up to 20%
  • Peak torque increased by 5%
  • Reduction of power losses by up to 30%
  • Speed capability increased by a factor up to 4x
  • New motor size
  • New 200 mm active length
  • Double amount of winding variants
  • Same mechanical interface


  • More than 60 standard sizes available
  • Nickel coating on stator and rotor
  • Water cooling channels
  • 600 VDC bus voltage
  • Very high continuous torque density
  • High peak torque
  • Low torque ripple
  • Compatible with IMTHP module for accurate thermal control

Main specifications

  • External diameter up to 1'290 mm
  • Large hollow shaft up to 1'070 mm
  • Peak torque up to 42'900 Nm
  • Speed up to 4'590 rpm

Refer to the corresponding specifications and catalog or ask for the torque motors integration manual for more information.