Pull Wires

Motion Dynamics manufactures precision pull wires and welded pull wire assemblies that translate operator input into controlled deflection and articulation in steerable catheters, endoscopes, and delivery systems. These components carry repeated tensile loads through tight bend radii, where consistent geometry, surface finish, and termination integrity determine how faithfully a device responds at the tip. We manufacture pull wires primarily in stainless steel, in round and rectangular profiles selected to match load, flexibility, and space requirements. Our assemblies most commonly integrate multiple pull wires—ends rounded prior to welding—laser welded to a femtosecond laser-cut ring for precise, repeatable attachment. All laser cutting is performed on femtosecond systems, whose ultrashort-pulse cold ablation produces clean, burr-free features with minimal heat-affected zone, preserving the base material properties that fatigue performance depends on. We also integrate pull wires with laser-cut hypotube and shaft components, reducing handoffs and simplifying downstream assembly. Following weld operations, assemblies can be PTFE-coated to provide the low-friction actuation required by surface-steerable devices. From prototype through production, every program is supported by in-house cleaning and passivation, in-process inspection, and full traceability.