Manufactured from a special Aluminium Bronze, SigmaDrives are a premium product requiring virtually no maintenance and containing no bearings or rubber in their construction. In addition to requiring little maintenance themselves, fitting one also means considerably reduced maintenance will be necessary on other stern gear components.

• Compact size, comparable to a standard shaft coupling.
• Provides perfect alignment for the propeller shaft and works perfectly in line or out.
• Easy and quick to fit, usually without slipping the vessel and without the need to modify the propeller shaft, or fit fixture plates or brackets for thrust bearings that are no longer required.
• Contains no rubber or bearings, and is manufactured from a special alloy that ensures long life with little maintenance required.
• A highly cost-effective solution requiring little or no costly modifications to the vessel.