The success of oil splash lubrication is closely depending on the speed from the gears. A standard guideline is always that a tangential speed of at least three m/s is required to ensure that splash lubrication to become helpful. of lubricant is very important, which is particularly crucial with grease. https://deandtfox.mdkblog.com/39993596/the-basic-principles-of-gearbox-oil-treatment