Components and spare parts

Rich experiences of many years, knowledge and suitable production capacities enable our company to produce components and spare parts for technological processes in metallurgy, mechanical engineering, transport industries, power supply and mining industry. Read more...

Heat treatment of steel

We provide heat treatment for all steel grades as required by our production programs and business partners... Read more...

Sistemska tehnika Laboratories

Laboratory capacities in Sistemska tehnika d.o.o. are adjusted for services in the following fields: non-destructive testing, calibration of length gauges, mechanical gauges, dimensional inspection, maintenance of measuring and test equipment and other supplementary services. Read more...


End of 2015, SIJ Group, represented by Ravne Knives d.o.o., completed all the procedures for the final acquisition of Sistemska tehnika d.o.o. and become 100-percent owner of the company

On 18.th of January, company Sistemska tehnika d.o.o. changed its name into Ravne Systems d.o.o. At the same time intensive activities for merger of (former) Sistemska tehnika d.o.o., Noži Ravne d.o.o. and Serpa d.o.o. are outgoing. Currently, Ravne Knives d.o.o. and Serpa d.o.o. still operate as an independent legal entity. Final merger into Ravne Systems d.o.o. is planned in the upcoming months this year.

Ravne Systems will have expertise in the field of engineering, R&D and production:

  • industrial knives and to knives related replacement parts for various industries, as metal, recycling, wood and wood processing, paper and tire industry,
  • forged rolls for cold rolling of carbon, stainless and silicon steel, aluminum and other non-ferrous sheet and foil, shells and coresfor continuous casting,
  • components and spare parts for various industries such as steel plants, forging shops and rolling mills,
  • sub – assemblies and complete equipment according to customer’s documentations,
  • large bearings/slewing rings,
  • revamping, upgrades and maintenance.

The combination of metallurgical and engineering know-how guarantees innovative technology and better value for you as the customer:

    • having a single partner with ability to offer wider range of products and services,
    • better technical support for the customers based on ST insight into technological processes in rolling mills,
    • higher performance new products based on synergies in R&D resulting in lower operations costs,
    • highest product quality as a result of tight integration into vertical chain from steel-making to final product allowing better control of the process,
    • better pre and post-sales activities through combined worldwide sales network present in more than 70 countries worldwide.

Actual news

  • Acquisition of Sistemska Tehnika d.o.o.
    Written on Monday, 12 October 2015 11:30

    Dear guests,

    we have prepared a new hardness conversion table. You can open the document by clicking on the image below.

    Written on Monday, 31 August 2015 12:05
  • Visit us at the fair in Turkey

    Dear all,

    you are kindly invited to visit us at 4. international aluminum technology, machinery and products trade fair in Istanbul. The fair will take place from 8th to 10th October. You can visit us in hall no. 10, at the stand no. A290.

    Written on Tuesday, 28 July 2015 05:52

    On 2 July 2015, our co-worker Jasenko Perenda successfully defended his doctoral thesis »Changes of Stress Strain Conditions in a Torsion Spring during their Manufacture and Operation« and was awarded the academic title PhD.

    Written on Tuesday, 07 July 2015 07:22

ISO 9001

BV Certification ISO 9001

"Products with high added value"


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Ravne Systems d.o.o.,
Koroška cesta 14,
2390 Ravne na Koroškem


phoneTelephone: 02 870 76 06

faksFax: 02 870 76 05

mailE-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

webWeb: www.st-ravne.si


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