SGO Korea Newsletter July' 2022 : What are the solid lubricants for underwater bearings?

2022. 7. 20.

What are the solid lubricants for underwater bearings?

Underwater Oilless Bearing

Underwater bearings are designed for long-term immersion in water, like offshore/marine, hydro power generation and dam gate applications. External lubrication is impractical, and prevention of water pollution and material color change due to corrosion are the most important factors, and solid lubricants containing Mos2, carbon, and general impregnation oils cannot be used for this purpose. If grease is to be used, such grease has to be treated with waterproofing or must be hydrophobic, and the performance may deteriorate when in contact for a long time.

Solid Lubricant - Eco-Friendly and Underwater

For these reasons, PTFE or Teflon-based resin solid lubricants with corrosion and friction resistance are embedded in corrosion resistant bronze bearings for underwater use. The underwater bearings are designed to form a water lubricating film differentiated from the general dry friction.

Polytetrafluoroethylene (PTFE) has an excellent chemical resistance and a low coefficient of friction (0.04 to 0.08) and is thermally stable even at high temperatures (-260°C to +260°C).

SGO produces underwater bearings custom-made for any particular applications. Please send your inquiry at info@sgoilless.co.kr or visit the website www.sgoilless.co.kr if you have any questions.

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