The benefits to be gained from the use of lubricated-for-life systems in industry are discussed and shown to be considerable. The provision of a lubricated-for-life system poses two requirements in addition to those found in more usual systems, viz. (1) a lubricant with a life longer than the mechanical life of the system, and (2) the retention of the lubricant in the system for the course of that life. This paper describes a possible solution to these requirements for a range of industrial gear units, using quite simple means and at modest cost, simply by considering lubrication as an integral part of the overall engineering design.
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