SigmaDrive Spherical shaft couplings for sailboats

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The SigmaDrive is the perfect complimentary piece of equipment for reducing noise and vibration on board sailboats. Once installed the unit ensures that seals and bearings are always perfectly aligned reducing wear and ensuring a longer trouble free life for all associated components. The SigmaDrive unit itself is manufactured from a special bronze alloy, with no rubber or bearings included in its construction, giving a low maintenance product which will have a very long service life. The SigmaDrive can easily cope with a 3 degree misalignment of the vessels shaft in all directions, 6 degrees in total.
Advantages of the SigmaDrive range
• High running speeds
• Low Maintenance
• Space-saving installation solutions.
• Solutions for large and small bending angles
• Using optimized material
• Long part life
• Coupling kits available for all marine gearbox transmissions.
The SigmaDrive is easy to install. The unit is hollow allowing the shaft to pass through it like a hard coupling. There is no cutting of the shaft required, no intermediate thrust bulkhead is required nor is there a need for a key. Sigmadrive grips the existing parallel shaft with a taper lock, common on large commercial boats. This gives it a 360 degree grip on the shaft rather than a point load at the key. The units can be installed with the boat in the water, however if there is a PSS shaft type seal installed this can be tricky as the shaft does need to be backed off prior to fitting the SigmaDrive.
To find out more visit:
kingpropulsion.com

[@RH-lz3om]

If a boat has a coupling that is say 10 years old with say, 500 hrs use, should it be disassembled and services/cleaned/greased?

[@RH-lz3om]

Great presentation of your coupling. I am buying a boat with one and needed to know more.