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  ProJUS s.r.o.

Address :

Poličská 444
539 01 Hlinsko

Workroom :

Rváčovská 792
539 01 Hlinsko


IČO : 25935551
DIČ : CZ25935551

Contact person:

Martin Vaško
+420 777 028 310

Ing. Jiří Mejzlík
+420 602 250 004

   (click for detail)

- location in CZ

- detail of Hlinsko

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NC Lathe for Turning of Rotors:

The lathe is intended for machining of commutators mounted on rotors of electric motors.


The machine basically consists of a main support part, the rotor and the knife supports being driven by electric servomotors SIEMENS with full support of NC control system SIEMENS SINUMERIC 840 D. The machine also features a brushing section that removes metal shavings and deburrs the commutator surface by means of two rotating brushes. The lathe has been designed as a stand-alone workplace, nevertheless, it can be equipped with a bin for semiproducts or it can integrated into a production line.


The machine can be modified according to specific requirements of the customer. Both the construction and the control and manipulation components can be specifically tailored to meet the customer’s needs.

We offer assembly of mechanical subassemblies including installation of hydraulic and pneumatic distribution and electric installation.

We offer design, construction and manufacturing of tools and assembly jigs.

We offer manufacturing of parts including heat treatment and surface treatment.

We offer our production capacity supported by a state-of-the-art design, construction and technology background to answer your demands for deliveries for serial mass production.

Technical specification:

Width 2420 mm
Depth 1505 mm
Height 1920 mm
Weight 850 mm
Power input 16 kVA
Nominal voltage 3x400 V
Air pressure 0,5-0,7 Mpa
Commutator diameter 30-55 mm
Commutator length 15-30 mm
Machine cycle 15-55 s
(depending on semiproduct size and specific cutting conditions)

Manufacturing accuracy:

Attainable accuracy depends on semiproduct size, its construction and particular cutting conditions.

Typical values:

- bar to bar step up to 0,001 mm
- eccentricity up to 0,01 mm

Double-Arbor NC Lathe:

The lathe is intended for machining of commutators for electric motors, but it can be used as well for machining of other rotary parts of similar type, ie. cylindrical parts allowing the machining of both inner and outer cylindrical surfaces and both front surfaces.


The applied control system SIEMENS SINUMERIC provides for easy programming (NC support) of machining process, ie. modification of cutting conditions during operation of the machine.

After being equipped with a bin for semiproducts, the machine can be used in attendance-free operation (only occasional check of production quality and replenishing of semiproducts required).


The machine can be integrated into a production line.

Technical specification :

Width 1880 mm
Depth 900 mm
Height 2325 mm
Weight 1800 kg
Power input 16 kVA

Workpiece outer diameter (0-30)mm – other on request length (10-50) mm – other on request.

Machine cycle depends on the part size and machining complexity (~ 10-20) s

Basic components:
  • Control system - SIEMENS SINUMERIC 840 D
  • Drive units - linear shifts servomotors SIEMENS
  • Arbors - SUHER with brake and frequency converters of revolutions
  • Pneumatics - SMC
  • Switchboard and control panel - Rittal


The machine can be modified as regards the workpiece specification as well as the applied basic components to meet the specific requirements of the customer.

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