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(March 16, 2011)
In tests, Orkot® bearings from Trelleborg Sealing Solutions prove to have exceptionally low wear. Trelleborg Sealing Solutions Orkot® TXMM bearing material is proven to be one of the best in direct electric motor propulsion systems on ships. The motors operate at low shaft velocities and, subject to boundary lubrication, bearings used must demonstrate exceptional wear resistance.
Proven in extensive test program
An extensive test program was conducted to prove Orkot® TXMM bearing material performance at low velocities. Bearings were tested to extremes velocities down to five meters/ 16 feet per minute at pressures up to six bar/ 87 psi and water flows down to two liters/ four pints per minute. The seawater contained Silica flour at 250 parts per million and the 200 mm/ eight inch bearing operated on an LG4 Bronze sleeve for 2,000 hours. The resulting overall wear of the bearing was just 0.027 mm/ 0.001 inch per 1,000 hours and shaft wear was minimal with an improved shaft finish. The tests were repeated successfully with Inconel and Nickel Chrome Boron coated shafts.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| N421 KOYO | 105 | 260 | 60 |
| N321 KOYO | 105 | 225 | 49 |