Large girth gears are used where heavy loads need to be carried in rotary tubular kilns, tube mills, and winches at sea. As the dimensions of such gears can be huge, it is often difficult to protect the gear teeth effectively against external media. In contrast to enclosed gears, dirt, abrasive cement and coal dust and salt water may enter the open drives, accelerating wear and corrosion. Additionally, girth gear drives are subject to heavy shock loads.
For large girth gear drives in particular, proper lubrication in all phases of operation is crucial. Klüber Lubrication has developed a speciality lubrication system to extend the service life of girth gears and protect them against premature wear: the A-B-C system consisting of special adhesive lubricants for priming (A), running-in (B) and operational lubrication (C).
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