DYNA-SWIVEL™ Cable Swivels for Mechanical, Electro-Mechanical and Electro-Optical Cables

Underwater cables often experience a sudden and uncontrolled release of rotational energy. When a tensioned cable is unable to rotate and suddenly goes slack, stored torque can throw the cable into loops and hockles. Upon cable retensioning, kinks, damage, and failure can occur.



DYNA-SWIVEL fast-acting swivels respond to low cable torque and allow unrestrained rotation. The cable is able to release stored torque to prevent catastrophic cable failure.


  • Mechanical, Electro-Mechanical & Electro-Optical models available
  • High working load and low break-away or starting torque (Starting torque as low as 10 in-oz on smaller models)
  • Stacked angular contact ball bearings for rotational friction
  • Oil filled diaphragm for automatic pressure temperature compensation
  • Spring-loaded rotary shaft seal prevents intrusion and oil loss
  • Corrosion-resistant shaft seal carrier and prevents deterioration in service
  • O-ring seals on all threaded parts allow for easy repairs
  • Factory sealed construction and vacuum assures reliable performance
  • Choice of mechanical end-fittings and electrical optical connectors
  • Up to 18 electrical channels (1A @ 400V)
  • Optional fiber optic channels

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Schedule a consultation to learn more about the DYNA-SWIVEL.




PMI Industries, Inc. is currently experiencing a system outage affecting access to our customer-related services, including order placement, shipment, and fulfillment, and impacting electronic and telephonic communications with our business and sales representatives. Our IT team is currently addressing this issue and working to restore these functions as soon as possible. The outage may impact delivery and receipt of emails sent to PMI Industries, Inc. and its representatives during this time. Communications sent during this outage may not be received by the intended recipient even after the issue is resolved. We apologize for the interruption in service and appreciate your patience as we work to resolve this outage. We will provide updates on the latest information as to when our services will be restored as it becomes available.**Update: We are expecting email services to be operating normally by Tuesday, February 18th.