The specific design of the O&K jack-up series has been evaluated by ABS for use in lifting drilling and servicing the legs and hulls of jackups, cranes and windmill mounting vessels. The device may be in series or have a junction box for offset motor installation. They may be electrically or hydraulically operated, with or without a negative parking brake. These jack-up drives can be supplied with integrated pinion gears from the m50 to the m100 and lantern pieces with integrated torque arms for easy installation. The unit is certified by ABS and DNV GL, as well as full 3.2 certification for geared bearing parts, with full traceability from raw material to finished parts.