Sizing for SigmaDrive is a quick and easy process and we can normally sent the results back same day. Simply complete the form below giving as much information as possible!

Sizing for SigmaDrive is easy, but we do need some crucial information. First is the engine data for power and rpm are needed to establish the torque range the coupling will work in. Next and most critical information is the transmission make and model; this can change the quotation price very quickly. The transmission model sets the output flange diameter, the bolt pattern and the pilot size. This can be the difference between SD55 or SD100 so please include it if you have it. Finally if the flange is non standard we can offer adapter flanges (at additional cost) to make everything work correctly.

SigmaDrive is a great product and one that will add harmony to the engine space by adding flexibility to the shaft Line.

SigmaDrive Quote Form

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Personal Information

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SigmaDrive Information

Please provide the make and model of your boat.  If you have additional details such as an approximate displacement, please enter these in the comments at the end. At a minimum we need the engine details, the transmission details and the shaft diameter.