Precision Micro Springs
& Wire Forms

Micro Wire Components

We craft some of the smallest wire components in the world – including Micro Springs, Medical Coils and Guidewires – working with any cold formable material in sizes down to 0.0005″. The design of wire components in this scale can be very difficult and different than conventional sizes, which is why much of our technology is proprietary and developed by the Motion Dynamics team who specializes in this micro capability. Some of the types of Micro Springs we manufacture include:

• Compression Springs
• Torsion Springs
• Extension Springs
• Wire Forms
• Garter Springs

Micro Springs

Manufacturing Micro Springs is one of our specialties. We often assist our customers in developing their micro spring designs, however, ultimately we build products to their drawings and specifications. We operate under a comprehensive quality program (ISO Certified) and support our processes with solid documentation, traceability and service. With every shipment you get the following documentation (unless specified differently):

Final Inspection Report – includes critical dimensional data
Material Certification – Motion Dynamics’ certification of material size and tolerance, chemical properties and tensile strength.

Nitinol Components

Nitinol is the common name used for the shape memory alloy Nickel Titanium (NiTi) and is derived from its place of discovery (Nickel Titanium Naval Ordnance Laboratory). It is uniquely different then typical wire alloys used for cold forming or coiling wire components. A reversible, solid phase transformation (known as martensitic transformation) is the force behind shape memory alloys. The material forms a crystal structure, which is capable of undergoing a change from one form of crystal structure to another. Temperature change typically initiates this transformation in the following way:

• Above the transformation temperature – Nitinol is super-elastic, able to withstand deformation when a load is applied and return to its original shape when the load is removed.
• Below the transformation temperature – Nitinol displays the shaped memory effect: when deformed, it will remain in that shape until heated above its transformation temperature, at which time it returns to its original shape.

Nitinol is typically composed of approximately 50 to 55.6% nickel by weight with the balance being titanium. Making small changes in the composition can change the transition temperature of the alloy significantly. These unique properties make Nitinol suitable for many different types of applications, particularly in medical devices.

Wire Froms

A wire form is a general term used for almost any shape of wire component other than the conventional compression, torsion or extension springs. These forms are designed for custom applications and typically perform some spring function. Motion Dynamics Corporation has designed and built custom machinery dedicated to manufacturing tight tolerance, high precision wire forms at a fast and efficient rate. From the simplest to the most complex geometries, we have the equipment to provide you with either a prototype or millions of pieces, and the expert team to assist you with…

• Wire forms from any alloy including Nitinol
• Wire forms from any shaped material
• Straightening and cutting wires to any length
• Wire sizes from 0.001″ to 0.070″ depending on shape and material type

Windings

Wire windings are wire components manufactured by winding the wire around a mandrel or arbor to produce the final product. This process offers some advantages over deflection coiling by driving the wire into tooling that deflects the wire into the desired coil diameters. Winding can provide tighter OD/ID tolerances while deflection coiling offers greater variation in design. Types of windings we provide include:

• Closed
• NiTi Coils
• Ends Ground & Not Ground