Revolutionary Contactscrew Cuts Assembly Time and Boosts Electrical Safety
A new metric screw, designed to simplify assembly and improve electrical connections, has entered series production in just four months. Developed through a collaboration between machine manufacturer Kurtz Ersa and cold forming specialist Baier & Michels, the B&M Contactscrew eliminates the need for extra earthing cables or contact washers while ensuring reliable grounding.
The project began when Kurtz Ersa sought a way to optimise the assembly of coated components. The solution came in the form of a specially designed screw that not only fastens parts but also establishes a secure electrical connection. Its ring cutter feature pierces the componentâs coating when tightened, creating a conductive path without additional parts.
The screwâs geometry was refined to enhance installation, with grooves that clear away coating residues during fitting. A copper-nickel surface coating further boosts conductivity while maintaining a clean appearance for visible applications. Olaf Ambros, Head of Technology & Development at Baier & Michels, oversaw the technical collaboration, while Kurtz Ersaâs design engineer Martin Aulbach praised the innovation as a 'connection technology game changer.' Close teamwork between the two companies accelerated development, cutting the time to series production to just four months. Kurtz Ersa is now evaluating the screw for broader use across new and existing machine platforms to streamline processes and reinforce safety in grounding.
The B&M Contactscrew offers multiple advantages: it reduces material use, simplifies assembly steps, and strengthens process reliability. With its dual function as both a fastener and an electrical conductor, the screw is set to improve efficiency in manufacturing applications where secure grounding is critical.
