MM transmissions sorted by power capacity

Maximum power graph for MM gearbox

In order to find the gearbox that is adapted to your needs, please check the table opposite.

The Masson-Marine gearbox denomination

MM gearbox

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


MM W 20000 NR CEW: non-reversing transmission, model 20000, with input and output shafts rotating in opposite directions.

For all specific requests, please contact us.

All our transmissions can be adapted to CPP, i.e. be built as non-reversing clutch/de-clutch transmissions.

Options And Special Features

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.

Have a question?

Let us call you back...



Europort - November 2017 - Holland
Europort 2017 Masson
We will participate to Europort trade show with our partner ADS Van Stigt. We will be happy to welcome you from November 7th to 10th 2017 - stand n°1310 - Ahoy Exhibition Center, Rotterdam.
Expomar May 25 - 26 - 27 - 28 2017
Masson Expomar 2017
Please come to visit us on Burela Exhibition. We will welcome you with pleasure on our spanish subsidiay's booth S103-104-105!
Masson Marine went with President François Hollande to South East Asia
group picture
Masson Marine was part of the French delegation during the state visit of President François Hollande to South East Asia
Indonesian Masson Success Story
MASSON MARINE contacted Jakarta office for several actions: Meeting programm with Singapore director (...) Read more
HALIEUTIS 2017 - Feb 15-19
Masson Halieutis
Our staff will welcome you with pleasure from Feb.15 to 19th on Halieutis fair in Agadir - Morocco. Do not hesitate to visit our booth, C48-c.
Euromaritime 2017 Paris
Masson Euromaritime 2017
Jan 31st - Feb 02nd We will welcome you with pleasure to Euromaritime event on our booth A18. Do not hesitate to visit us. PARIS - PORTE DE VERSAILLES Hall 3
Inside marine
Clic here to access to a recent article published for masson.
SMM 2016 Hamburg
SMM 2016 Masson
Masson collaborators will have the pleasure to meet you during the fair, from september 6th to 9th. Please don't hesitate to visit us on our booth, - Hall A4-419 - Hamburg Messe Fairground
ISO Renewal
ISO 9001 is renewed for Masson Marine who highly cares about customer satisfaction (...) Click to read more
Masson Marine being promoted by its district. Yonne Développement makes an editorial on its web site. Please have a look at it on the link.
Masson in Indonesian Ministry
Rewarding meeting with the Ministry of Transport in Jakarta: We will take part to a huge project in Indonesia. We are very grateful for their welcoming.
Happy Birthday Masson Marine!
10 Years already... Whole staff is proud to have taken part to Masson Marine's sucess: Many nice & prosperous collaborations realized already and many others still to come!
Asia Pacific Maritime 2016 Singapore
Masson Marine Propulsion will have the pleasure to meet you, on its booth, D-T36, from March 16th to 18th 2016, at "Marina Bay Sands Expo & Conv. Center" - SINGAPORE.
Future Green Vessel
Masson took part at CORICAN successful 1st conference on research and naval innovation within energy transition.
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