Quality starts with the materials used Milling of casings Materials are of key importance to us. The complex mechanical systems used, the stress and strains they are subjected to and the demands we make on quality explain why we have a special interest in materials and their processing. We only use materials which have passed endurance tests. In particularly critical modules, we increasingly combine them with innovative materials. Gear wheels after cutting At Prontor we have a long vertical range of manufacture, i.e. we also produce gear wheels and many screws ourselves. For decades, this has meant that we have had to develop and improve our own machines and technologies. However, this also gives us the invaluable advantage of complete control over quality and the properties of even the smallest parts.