New shaft bearings for the Mediterranean ferry
Egyptian distributor and integrated service provider of Thordon Bearings, Nefertiti Marine, has announced that it has commissioned water-lubricated Thordon SXL propeller shaft bearings installed on board the 24,112 gross ton ferry Daleela .
The RoPax, built in 1991 and with a capacity of 400 passengers, owned by El-Etehad International and chartered to Scanandro Holdings, began operations on the new Piraeus-Limassol route in June 2022 following a major refitting of the floating wharf operated by the Suez shipyard in Egypt. .
Nefertiti Marine supplied a total of 14 Thordon SXL front, middle and rear bearings machined to fit 525mm (20.6in) and 530mm (20.8in) propeller shaft diameters. The original rubber propeller shaft bearings were completely worn, exceeding the maximum allowable clearances of 5 and 7 mm (0.19 and 0.27 in).
According to Karim Abd El Karim, engineering manager at Nefertiti Marine, “there were no visible cooling grooves in some areas of the rubber bearing due to excessive wear.”
El-Etehad’s decision to replace the propeller shaft rubber bearings with the SXL elastomer material follows the success of a similar installation on sister ship Amal built in 1993 by the owner. Suez Shipyard converted the ship’s original bronze rudder bearings to SXL in 2021.
“The owner was aware of the environmental benefits of a seawater lubricated propeller shaft bearing, but wanted a more economical and low-maintenance solution that could reduce the time spent in dry dock,” said said El Karim. “Compared to a traditional rubber bearing system, an SXL bearing has a much longer life and in this case doubles the time between dry-docking. We worked closely with the shipyard on this project and completed commissioning in early June.
“It was important to have a proven bearing system to reduce the high operational expenses associated with traditional rubber bearings,” added Awny Gad, Superintendent of Engineering, El Etehad International. “When Nefertiti Marine proposed the SXL solution, we wanted to try it. So far we are very pleased with the performance of the Thordon hardware and the 24/7 customer service we receive from Nefertiti.
Prior to Daleela’s historic voyage, the last ferry to operate the 30-hour route between Greece and Cyprus was the Salamis Star in October 2001.
Daleela sails from Piraeus to Limassol every Tuesday and Friday with the return crossing on Wednesdays and Sundays.