is a simple device for lubricating a
journal bearing. A metal ring rides loosely on
the journal shaft and the lower part of the ring dips into a small oil
reservoir. The reservoir is fed by a
bottle-fed oiler. The rotation of the shaft turns
the ring, which carries oil up to the point of contact with the shaft and
into the bearing. Though not ordinarily considered a
circulating lubrication system,
the ring oiler is similar in principle and generally requires a long-life
oil of the R&O type.
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