The Masson-Marine gearbox denomination

All our gearboxes are symmetric with respect to the direction of rotation; the output shaft may run in engine-wise direction or in counter-engine-wise direction in the ahead mode of the ship.

Masson-Marine transmission names are composed as follows

First part of the name

• MM : Masson-Marine
• W : “workboat”, as our gearboxes are designed for professional applications in continuous operation
• Number : this is the model type; the higher the number, the higher the power ratio that can be transmitted

Last part of the name

• The gearbox is a standard gear with vertically offset input and output shaft lines.
• NC : No Clutch
• NR : “Non Reversing” – this transmission is a clutch/de-clutch gearbox (no reverse gear).
• CEW : “counter-engine-wise” means that the direction of rotation of the output shaft is the opposite of the input shaft rotation.
• EW : “engine-wise” means that the input and output shafts rotate in the same direction.
• C : “coaxial”. The input and output shaft lie in line with one another.
• DS : “dual speed” – this gearbox has two different reduction ratios

Our gearboxes have a reliable and steady hydraulic system, and strong casings machined with high precision. They are suitable for continuous heavy-duty operation.

As an optional equipment, we can also supply the engine coupling, the propeller shaft coupling flange with registering coupling bolts, and SAE bell housings.