OIL‐INJECTION COUPLINGS FOR TANKER Available to Purchase

THE SKF oil injection couplings type OK‐HB, are compact and easy to mount and have been very much appreciated in the shipbuilding industry. Some propeller shafts have to be moved astern during inspection and maintenance and are, therefore, constructed without flanges. The interference fits which join the sections of the shaft systems must be very secure, as they are subjected to considerable torque. One SKF oil injection coupling, the OK 750 HB, per shaft system is used in the world's largest tanker, the 550,000 dwt Batillus. As each coupling is subjected to a maximum torque of 3,000 kNm but is able to transmit 11,000 kNm the safety factor is more than satisfactory.