Siebenhaar serves a worldwide base of customers with engineering to order solutions for many of today’s challenging lifting and drilling projects in the marine and offshore field.

Siebenhaar slewing and winch gearboxes have a long history in marine and offshore industries. These gearboxes and winches are installed in the huge plants of the worldwide known brands in field offshore and marine, operating around the clock to perform their job: lifting and rotating.

Siebenhaar engineers are acquainted to design gearboxes which must meet the third party requirements: an essential key in marine and offshore industries. Our gearboxes and hydraulic safety brakes have numerous case and type approvals from known third parties as: DNV-GL, ABS, Lloyd’s register, CCS, etc.


  • One of our reference customers in the lifting, drilling and subsea solutions is the Huisman Equipment BV Company which has been successfully using Siebenhaar planetary gears and winches for over 25 years. Cranes with up to 10,000 tonnes of line pull are just one of many challenges that need strong and innovative partners.


    The world's largest cutter dredger, currently under construction, is fitted with several Siebenhaar winches. These include complex winch stations featuring a cable winder and hydraulics as well as the biggest free-fall winches in the world reaching 200 tonnes of line pull to be used as a spud-hoisting winch.

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