. Science of railways . Hancock Oil Cups The threaded portion of the steel stem is split and isopened to provide sufficient tension to hold it in tension can be increased if desired as the thread wears. These oil cups are very popular in that there are no partsto be removed for filling or adjusting, for their durability andreliability of adjustment, also for their economy in the useof oil. 504 LOCOMOTIVE APPLIANCES. GEEASE CUPS. While grease has been very successfully usedas a lubricant on shop and mill machinery, its use.

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