Abstract
The mean contact pressure of a machine tool slideway is relatively low, and its sliding velocity is also low. Many surfaces in such a contact are in a boundary lubrication state. In this paper, the contact resistance between smooth model surfaces under boundary lubrication is precisely measured. The result is compared with the static friction measured on real rough surfaces lubricated by various lubricants. It is shown that contact resistance and static friction correlate strongly, and that the boundary lubrication ability of lubricants (the oiliness) is predicted by the contact resistance between smooth model surfaces.
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