Bal Seal Engineering’s springs, seals, and contacts help improve the performance and reliability of powered surgical tools, orthopedic implants, pumps, monitors, active implantables, and other critical medical equipment. Our custom-engineered products enable designers to achieve higher speeds, longer service life, and more functionality in less space.

Bal Conn® Electrical Contact

Our Bal Conn® electrical contact is the solution of choice for designers seeking to ensure consistent connection in implantable devices used to deliver neuromodulation and cardiac therapies. Due to its redundant contact points, the Bal Conn offers very low contact resistance. Its canted coils provide excellent resistance to fatigue and more design flexibility than any other implantable device interconnect technology.

  • Implantable, precision-machined metal housings
  • Low-force, low-resistance spring contact elements
  • Redundant contact points for reliable connectivity
  • Miniature contact diameters ( .9mm and smaller)

SYGNUS® Implantable Contact System

The world’s first integrated seal and contact system for active implantable devices, SYGNUS® combines reliable Bal Conn® electrical contact technology with proven implantable-grade silicone isolation seals, resulting in a connector “stack” that can accommodate lead diameters down to 0.7 mm. The system’s contact element consists of a housing made from medical-grade MP35N® and a platinum-iridium or MP35N® Bal Spring® canted coil spring.

  • Integrated contact/seal design
  • Multi-point conductivity
  • Smallest pitch in the industry (~2mm)
  • FDA compliant

Bal Seal® Spring Energized Seal

Our seals are precision-machined from PTFE and other premium polymers, and they’re engineered to deliver longer service life and more equipment uptime. Their spring energizers ensure even, consistent wear, and their jacket materials can be customized to meet specific requirements in rotary, reciprocating, oscillating, and static applications.

  • Controllable friction forces
  • Excellent media and temperature resistance
  • Wear-regulating spring energizer
  • FDA compliant

Bal Spring® Canted Coil Spring

Our spring mechanically fastens, conducts electricity, and shields sensitive electronics from EMI/RFI. Its independent coils, which serve as multiple contact points for optimal current carrying capability, ensure consistent, reliable connection—even under shock and vibration.

  • Superior conductivity & power density
  • Multifunctional for lighter, simpler designs
  • Customizable insertion/removal forces

Medical Active Implantable Applications

SCS Device



VAD Device



Cardiac Device



Cochlear Device

Medical Tools & Equipment Applications

Surgical Saw



Spinal Implant



Catheter



Knee Joint



Medical Industry Achievements
Shaping CHM Standards As members of the CTF, we helped to develop the cardiac IS-4 standard. We also contributed to IS-4 requirements for non-set screw connection systems. Pioneering Therapies When makers of the implantable alfapump® needed to boost battery life and guard against leakage, a Bal Seal® made it possible. Today, the device is helping ascites patients all over the world live more comfortably. Making More Connections Neuromodulation devices have been shrinking as demand for functionality grows. Our Bal Conn®, with its reduced axial pitch and sizes down to .020 in., lets designers build smaller devices that do more.

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