The world's leading trade fair for woodworking industry and the most important meeting place for the industry.

K is the world’s largest trade fair for the plastics and rubber industry. 

In 2025, SIJ Ravne Systems will be exhibiting at six major trade fairs. We will be presenting industrial knives at two upcoming events.

SIJ Ravne Systems presents new brands which cover four main groups of products and services.

It was our pleasure being a guest at Business Talks for trusted partners by CCIS.

Meet the employes from SIJ Ravne Systems. 

OUR PEOPLE ARE THE KEY TO SUCCESS.

By supporting you in choosing the right material for your application, with production at the highest level and our own heat treatment in the largest vacuum furnaces in Europe, we will help you achieve your goals in your production.

You'll get lots of exciting insights and information about the company - with on-site footage from the headquarters in Ravne na Koroškem in Slovenia.  

Steel parts often require some form of heat treatment to increase their hardness and obtain maximum strength and durability. We need to carefully consider the heat treatment processing requirements to ensure the optimum performance properties can be achieved from the steel used to manufacture the machine blade.

DESIGNED BY SIJ RAVNE SYSTEMS 

We are delighted to officially announce the launch of our new packing and marking line for knives. Customized turnkey solution, from conceptual design to customized engineering and in-house installation.

SIJ Ravne Systems – one of the biggest original European producers of chipper knives

Ensure proper handling of the knives always to avoid damages and assure a long lifetime.

Ravne na Koroškem, January 29, 2020 - 400 years ago, in 1620, Melhior Puc, an ironsmith and miner from the Labot Valley, brought a concession for two melting furnaces to Črna na Koroškem and set up the first ironworks at Mušenik.

 We appreciate our customers’ feedbacks!

Here’s what some of our customers say about our work.

For perfect knife performance, proper and timely maintenance is required. It is recommended to follow machine instructions from machine manufacturer for installing the knives and setting correct cutting gap.

Ask for DURALIFE V+ KNIVES – the next generation of granulator knives

An industrial knife is the heart and soul of the recycling process. It crushes and mills different types of waste – reusable raw materials (PET, plastics, copper, aluminium, rubber etc.) into granulate. Waste is never completely homogeneous. Normally it contains a variety of foreign bodies, which is why knives are usually under constant pressure. Consequently, chipping and breaking of the blades occurs quite often and is nothing uncommon.

Knife manufacturing technology at SIJ Ravne Systems has evolved tremendously over the years to meet the increasing demand for cost-effective top-quality knives for specific industrial applications (metal industry, recycling, wood and wood processing industry and also paper and tire industry).