Gear reducers can be complex machines that apply the science of gearing and mechanical benefit to run thousands of complex functions in lots of different industries. Gearbox manufacturers have designed a number of gearboxes in multitudes of different configurations and gear ratios. When gear reducer box failures happen it is critical to understand how to repair the failed products and how to prevent future failures in order to keep production up and running.
Three things that may cause premature failing are poor lubrication, misalignment and overloading. Failure settings can involve bearing failures or gear failures, or both.
Lubrication is crucial 
for both bearing and equipment life. Important areas of lubrication are the level of lubricant that is delivered to each gear mesh and bearings, and also the properties of the lubricant. The lubricant forms a slim film that stops metal-to-metal contact between gears and between bearing components. Modern industrial gears make use of an involute tooth type and tooth engagement, which is a mixture of rolling and sliding. The essential oil film is a slim barrier between moving parts which allows the rotating power to carefully turn the gears quickly without damage to the metal surfaces. Contamination in the lubricant can result in scuffing and far faster wear for both the bearings and the gearing in a gearbox, so that it is essential that maintenance mechanics examine gearbox lubricant for contamination periodically, once for yr as the very least. Each gearbox would have a recommended oil level in addition to a method to lubricate both bearings and the apparatus arranged. With bath lubrication, all shifting components dip listed below the essential oil level. With splash lubrication, oil can be splashed around inside the gearbox housing by fast moving elements, covering all shifting parts. With pressure lubrication, oil can be pumped to each gear mesh and bearing through spray nozzles or essential oil passages from the gearbox oil sump or from and external reservoir.