Overhaul of Motors and Elevators

In the production facility of 2000 m2, Mikromotor performs overhaul and service of all types, powers and in all versions of electric rotary machines.

Asynchronous el. rotating machines
Synchronous electronic rotating machines
Direct current machines
Electric traction machines
High voltage machines

Mikromotor has a well-equipped facility, and professional staff, and we do all entrusted work according to the established technology. By agreement, we carry out loading-unloading, transport, and when necessary:

– stator-rotor winding in insulation class F, H, or C at the customer’s request
– re-plating or replacement of a new stator-rotor sheet package
– replacement of bearings, brushes, brush holders, brush holder supports, collectors and everything else
– complete service and overhaul of high-voltage electric motors with a voltage level of up to 10 kV and a power of up to 7 MW
– production of coils for traction motors and HV electric motors using the latest RESIN RICH technology

We have machines for the polymerization of windings, a machine for shaping windings, as well as a drive for vacuum impregnation of stators and rotors.

For the production of our products and services, we use the highest quality materials from well-known global manufacturers.

We use copper and aluminum conductors in class F, H and C Insulation materials from ISOVOLTA, DOLPH’s, ALTANA. SKF, FAG bearings, SHUNK, MORGAN graphite brushes, ISOLA collectors, etc.

We do all the necessary measurements and tests in our production plant, and if the need arises, the following measurements can also be performed in the field:
  • Measurement of bearing noises
  • Vibration measurement
  • Fluid flow measurement
  • Temperature measurement with a thermal imaging camera
  • System coherence and centering
The mechanical drive completes the previously mentioned units as an indispensable part of electrical work. rotary machines, pumps and elevators.


This facility deals with:

  • Designing and manufacturing machine parts and assemblies, for overhaul and repair of electric motors and devices, as well as parts for pumps.
  • By making new cages for the rotors
  • By making sliding rings, sliding bearings
  • By making new shafts
  • By balancing large swing masses and fans
  • By making drive ropes for elevators
  • Metallization and processing (shafts, bearing housings, etc.)
Mikromotor is the leader on the domestic market in the field of Ex protection. Our products and services are used by companies in the oil, specialty, chemical and food industries.
We are authorized by the Institute for Prevention to service engines, devices and installation equipment in Ex protection according to the SRPS EN 60079-19 standard (operation of electrical devices in explosively endangered environments).
We repair and overhaul electric motors up to 700 kW and other devices in one of the following types of EX protection:
  • Indestructible Case (EXd)
  • Enhanced Security (EXe)
  • Intrinsic Safety (EXi)
  • Overpressure (EXp)
  • N encapsulation (EXm)
  • Type “N” protection (EXn)