REVERSIBILITY

When a grease encounters abnormally high temperatures for short

periods of time and then returns to normal operating temperatures, or

encounters high shock loading conditions, bleeding of the grease’s base

oils from the grease can occur. Also, during normal operation of a bearing

it is the function of a grease to release its base oils in order to lubricate

the bearing. However, when the machine is shut off, or when conditions of

high temperature or high shock loading occur, the grease must have the

ability to recapture its base oils in order to return to its original

consistency and continue to function as intended. In other words it must

exhibit Reversibility.

The Reversibility of a grease is defined as the grease’s ability to recapture

its base oils in order to return its original consistency and to continue to

function as intended. A grease’s Reversibility characteristics are dictated

by the type of and the amount of thickener used. The higher the thickener

content the less the grease’s Reversibility.

Schaeffer Mfg’s Aluminum Complex Base Greases contain a thickener

content of 7.5% which results in 100% Reversibility characteristics.

Schaeffer Mfg’s Bentone Base Greases contain a thickener content of 6%

to 7%, which results in 95% Reversibility characteristics.

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