Surface coatings have always been used to increase the durability of a threaded spindle. Coatings as corrosion protection, such as electro-galvanizing, hot-dip galvanizing, chrome-plating, phosphating, burnishing, bonding, thick-film passivation, nitro-carburizing, anodizing, anodizing and, in some cases, also painting, are established here as corrosion protection.
These coatings are mainly used for static threads, i.e. fastening threads. The usability of these coatings must be considered separately for dynamic applications, i.e. for drive, standard and movement threads. A deterioration in the coefficient of sliding friction can often be observed in combination with the surface coatings mentioned. The durability of the coating must also be checked on a case-by-case basis. The mechanical stress can cause the coating to wear off.
Bonded varnishes and coatings are used again and again for dynamic applications. This enables an absolutely dry run, which is absolutely necessary in laboratory equipment, in the food industry and in the pharmaceutical sector. There are no maintenance intervals and the coating does not attract any dirt particles, unlike lubricants. These sliding coatings are mostly based on PTFE.
There are also coatings and technologies available on the market to increase surface hardness, improve temperature resistance and improve resistance to acids, bases and solvents.
junaspin can have almost all coatings applied by external partners. Depending on the process, the layer thickness must be observed so that the desired components are still true to gauge even after coating.
junaspin is happy to help you choose a surface. In addition to the question of manufacturability, we also have experience with the application and durability of various coatings and surface processes. In addition to the pure calculation, experience from “real applications” and tests can also be incorporated.