FLENDER gear units for jack-up rigs


Jack-up rigs are used to search for oil and gas deposits down to a maximum water depth of 130 m. Tugboats or special transport ships tow the rig to its place of use. The platform, which can often weigh as much as 6,000 tons, normally stands on three legs and can be jacked up vertically. The rig is raised and lowered by up to 54 helical planetary gear units connected by racks and pinions. A high transmission ratio in excess of 8000 and high torque are characteristic of FLENDER gear units.

The jack-up's ultra-short overall operating time of 200 to 300 hours contrasts with the long service life demanded of the gear units. FLENDER gear units are carefully made to the customer's specification for this reason, while every effort is made to minimise the capital costs. As a key safety feature of the rig, however, they are subject to the stringent regulations of the classification societies and designed for the harsh conditions of extreme operating environments.

Technical data

  • Planetary gear unit

  • P2PA 21 for 440 KIP class with overall transmission ratio i = 6700

  • P2PA 28 for 1000 KIP class with overall transmission ratio i = 8100


  • Finite-life fatigue resistance: optimized for specific applications

  • Low capital costs

  • Extremely reliable and robust

  • Completely filled with oil

  • Integrated package solution means one face to the customer (gear unit, drive shaft and pinion, couplings, motor, controller)

  • Compact, space-saving design

  • ABS acceptance

  • Suitable for temperatures from -20 °C to +50 °C

  • Worldwide service


  • Jack-up rigs