Sigmadrive

Sigmadrive

Even if an engine and propeller shaft are perfectly aligned when the vessel is built, maintaining that alignment when the engine is running and the vessel moving is an impossibility.


What makes SigmaDrives different is their ability to resist propeller thrust when installed as a standalone coupling, directly from the shaft to the output flange on the engine’s transmission. It reduces and even eliminates vibrations that originate from an imperfect alignment between the propeller shaft and the engine, compensating for up to 3 degrees in all directions. This system can also be installed using thrust bearings so that the engine can be placed utilizing the space available ergonomically.


Sigma Drives are designed to fit virtually all boats from yachts to workboats, canal narrow boats to military vessels; in fact, pretty much any powered vessel with engines up to 1300hp. They are extremely easy to fit, requiring no modifications to the craft, which can usually be equipped with the drive unit while still in the water. Together with its anti-noise and vibration abilities having a SigmaDrive on your vessel also ensure that seals and bearings are always perfectly aligned, reducing wear and guaranteeing a longer trouble-free life for all associated components. 
For more information on SigmaDrives please see our catalogs and download page. Questions? 866-790-7767 or email us at info@getaprop.com


Sigmadrive

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Bruntons SigmaDrive Shaft Coupling SD100

Bruntons SigmaDrive Solid Propeller Shaft Coupling for 1.500-1.750" shaftsCouplings have been the sa..

$1,038.00

Bruntons SigmaDrive Shaft Coupling SD150

Bruntons SigmaDrive Solid Propeller Shaft Coupling for 1.750-2.000" shaftsCouplings have been the sa..

$1,848.00

Bruntons SigmaDrive Shaft Coupling SD225

Bruntons SigmaDrive Solid Propeller Shaft Coupling for 2.000-2.250" shaftsCouplings have been the sa..

$2,490.00

Bruntons SigmaDrive Shaft Coupling SD300

Bruntons SigmaDrive Solid Propeller Shaft Coupling for 2.000-2.500" shaftsCouplings have been the sa..

$3,222.00

Bruntons SigmaDrive Shaft Coupling SD55

Bruntons SigmaDrive Solid Propeller Shaft Coupling for 1.00-1.50" shaftsBruntons addresses these iss..

$690.00