Thread-rolling screws have a characteristic property: during assembly, they automatically produce their suitable nut thread by forming the material in the counterpart. This has several significant advantages: direct bolting eliminates the process steps of drilling, threading and chip removal, saving both time and money. At the same time, the material consolidation in the thread ensures a higher load capacity. Thread-rolling screws therefore represent a very economical solution and are therefore preferred for building constructions.
In order to benefit from the practical screws in the long term, optimum corrosion protection must be planned in advance. DÖRKEN offers effective solutions here. With our thin coating systems and specific relubrication, you prevent contact corrosion and protect your components from damage.
Thread-rolling screws are generally more expensive than metric standard screws, but are gaining in importance due to their advantages. Since they can be screwed into all plastic deformable materials, they are not only used in the automotive industry and in mechanical engineering, but also in building constructions of all kinds. Without suitable protection, there is a risk of corrosion due to the screwing into components made of various materials and the daily stresses (temperatures, humidity, chemical substances). A zinc flake coating from DÖRKEN offers efficient protection.
Some advantages of coating thread-rolling screws
For efficient use, thread-rolling screws must be easy to assemble and easy to undo without undue force. The colourless DELTA-LUBE® 50 lubrication not only guarantees defined coefficients of friction and a low thread-rolling torque, but also protects the underlying basecoat and thus improves corrosion protection.
The coating is carried out in a non-electrolytic process according to the standards DIN EN ISO 10683 and DIN EN 13858. The dip spin process is the suitable application technique for small components such as thread-rolling screws.
The special properties of DELTA-LUBE® 50
DELTA-LUBE® 50 achieves a defined coefficient of friction window of 0.06 – 0.09 µges as well as a low thread forming torque.
DÖRKEN Coatings has been successful in the field of microlayer corrosion protection systems for over 30 years – thanks to continuous innovation, close cooperation along the entire value chain and consistent quality assurance, we offer flexible coating solutions for thread-rolling screws and all other components that need to be reliably protected against corrosion. Whether you are a manufacturer or a coater, the experts at DÖRKEN Coatings are always on hand with advice and assistance and provide comprehensive support.
The advantages of thread-rolling screws for the manufacturer
Do you have any questions about our coating systems for thread-rolling screws or other components? Would you like to inform about other Dörken MKS coating solutions such as electroplating, coil coating or KTL?
Then contact our specialists and let us talk about your requirements – we will gladly help you!