Abstract: A lubricating system which uses a chain sprocket to determine the precise chain pin location and deliver the lubricant to preselected points along an endless moving chain is disclosed. In accordance with the invention, steel bars or plates are mounted on alternate sprockets or gear teeth such that as the sprocket rotates the steel bars pass in proximity to a magnetic sensing means which creates a signal to energize fastacting solenoid valves so as to cause the lubricant to be delivered through lubricant nozzles positioned in alignment with the links of the chain.