In addition to the design decisions and details described above, regular maintenance is important for both the gearbox and its paired lubrication system. This includes changing filters, pumps, coolers and breathers, as well as conducting regular oil sampling and seal lubrication. When the gearbox and its lubrication system are correctly maintained, bearing replacement is infrequent and should be informed by vibration spectrum analysis. With the above strategies in place, grinding mill gearboxes have proven to be very reliable and are included in most mills operating with motor powers less than 8 MW.
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