ock nuts.Р(c) Lubrication. Slideways may be lubricated by either of the following systems:Р1) Intermittently though grease or oil nipples, a method suitable where morements are infrequent and speed low.Р2) Continuously, e.g. by pumping though a metering valve and pipe-work to the point of application; the film of oil introduced between surfaces by these means must be extremely thin to avoid the slid “floating”. If sliding surfaces were optically flat oil would be squeezed out, resulting in the surfaces sticking. Hence in practice slide surfaces are either ground using the edge of a cup wheel, or scraped.Both processes produce minute surface depressions, which retain “pocket” of oil, plete separation of the parts may not occur at all points; positive location of the slides is thus retained.
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