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Technical & Practical

December 1, 2008

Bearing Housing Protector Seals for Gearboxes

In extreme environments, dual-face, magnetic bearing-housing seals will keep contamination out

Chris Rehmann and Alan Roddis, Aesseal

Lubricant contamination in gearbox bearing housings can substantially reduce gear life. In critical applications, dual-face, magnetic bearing-protector seals will keep contamination out. Dual-face, magnetic bearing protectors are preferred in many difficult applications, such as wet cooling tower gearboxes, while advanced rotating labyrinth seals are more universally applicable. Both users and gearbox manufacturers should consider peripheral shaft speed, shaft movement and lubrication method. However, all things considered, fully sealing a gearbox by retrofitting advanced bearing protector seals is highly cost-effective....

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