nitinol springs

Nitinol Springs

Modern Grinding manufactures nitinol springs for a variety of medical devices. Due to the large number of nitinol spring products we manufacture, we have a variety of nitinol wire sizes in stock for fast turnaround on your project. Modern Grinding is a division of Custom Wire technologies which holds the core nitinol coil expertise within the organization.

Nitinol Coils

Nitinol Springs offer unique properties which can be superior to stainless steel springs for certain use cases. Modern Grinding has the capability to manufacture monofilar nitinol coils or multifilar nitinol coils. We can use flat nitinol wire or circular nitinol wire and then coil it around a mandrel to form the nitinol springs. The mandrel we use can have a variety of shapes such as flat or tapered to coil a custom profile.

Nitinol is a metal alloy based on a roughly equal combination of Nickel and Titanium. The unique properties of nitinol are it's shape memory and its super elasticity. When forming nitinol springs, designers are able to use the super-elastic nature of nitinol to their advantage just as they would with nitinol wire. Nitinol is an MRI (magnetic resonance imagining) compatible alloy. Compared to stainless steel coils, nitinol coils are more flexible whereas stainless steel is more rigid.

Coil Forming

Nitinol springs are typically formed by wrapping nitinol wire around a mandrel. The mandrel OD is the ID of the coil. This type of forming allows us to manufacture both prototype size order and large production order for major medical device companies. Modern Grinding has the ability to manufacture both compressed nitinol springs or extension nitinol springs. In addition we can manufacture a wide variety of custom nitinol springs.

Coil Options

Modern Grinding is contract manufacturer of custom nitinol coils. Each product is made to order, we don't have any off the shelf coils. Options include continuous wound, closed end, open end, variable pitch, variable diameter, step diameter, tapered diameter and dead coils. Typical wire sizes that we have in stock are .002 to .032. We are able to achieve ODs as small as .010 and as large as .3".

Nitinol Implants

Due to its bio-compatible nature nitinol is suitable for use in orthopedic implants. Modern Grinding makes custom OEM wires and pins for the orthopedic and medical device industry. Wire options include:

Nitinol Options:

  • Light Oxide
  • Dark Oxide
  • Nitinol 1, 2, 4
  • Nitinol in lengths from a few centimeters to 10, 20, 30 meters
  • Medical Grade Nitinol
  • Nitinol Products:

  • Nitinol K-Wire
  • Nitinol Guidewire
  • Nitinol Corewires
  • Nitinol IM Pins
  • Nitinol External Fixation Pins
  • Nitinol Needles
  • Nitinol Springs
  • Nitinol Basket
  • Don't hesitate to contact Modern Grinding with your next custom nitinol spring project.

    Quote Your Next Project

    • Guidewires, Mandrels, Core Wires
    • K-Wires, Steinmann Pins, Needles
    • Coils, Springs, Orthopedic Pins
    • Custom Medical Wire Prototypes

    In the News

    Check out Modern Grinding in a recent issue of Micro Manufacturing for a feature article about our micro manufacturing capabilities.

    Also, our very own Jim Boldig was recognized as a Top 30 under 30 Medtech Innovator by Qmed.