TODAY’S TIP

Protecting Bearings From Corrosion

In a humid environment, condensate can form in rolling element

bearings and cause corrosion, leading to a reduction of the

bearing life. The condensed moisture's effect can be reduced by

carefully choosing the grease lubricant. Greases thickened with

sodium soap will absorb (emulsify) large quantities of water,

but may, however, soften it to such an extent that the grease

flows out of the bearing.

Lithium soap greases do not emulsify water, but with suitable

additives can provide good protection against corrosion. There

are also a number of greases available containing synthetic

thickeners that offer excellent protection against corrosion,

prolonging the bearing life.

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