Gear reducers can be complex devices that apply the science of gearing and mechanical advantage to run thousands of complex functions in many different industries. Gearbox producers have designed a number of gearboxes in multitudes of different configurations and equipment ratios. When failures happen it is advisable to understand how to restoration 
the failed models and preventing future failures to keep production ready to go.
Three things that can cause gear reducer box premature failing are poor lubrication, misalignment and overloading. Failure settings can involve bearing failures or equipment failures, or both.
Lubrication is critical for both bearing and equipment life. Important areas of lubrication are the level of lubricant that can be delivered to each gear mesh and bearings, along with the properties of the lubricant. The lubricant forms a thin film that helps prevent metal-to-metal contact between gears and between bearing components. Modern industrial gears use an involute tooth form and tooth engagement, which really is a combination of rolling and sliding. The oil film is usually a thin barrier between moving parts that allows the rotating power to turn the gears quickly without harm 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 check gearbox lubricant for contamination periodically, once for yr as a minimum. Each gearbox could have a recommended oil level in addition to a technique to lubricate both the bearings and the gear arranged. With bath lubrication, all moving components dip down below the essential oil level. With splash lubrication, oil is definitely splashed around inside the gearbox casing by fast moving parts, covering all moving parts. With pressure lubrication, oil is certainly pumped to each equipment mesh and bearing through spray nozzles or essential oil passages from the gearbox essential oil sump or from and external reservoir.