For a long time it has seemed that belt drives are about to replace good old-fashioned chain drives. But it is not to be. Car engine manufacturers, among others, seem to prefer chain drives more than ever. This is good news for IWIS J. Winklhofer & Söhne GmbH & Co. KG in Munich, a leading manufacturer of high-performance roller chains. For IWIS, RUWAC has developed an oil mist extraction unit tailored to the precise requirements of the chain manufacturing process. In the last stage of the production cycle before packing and despatch, IWIS immerses its chains in an ultrasound oil bath. The oil is warmed beforehand to 75°C to ensure that the lubricant reaches all the awkward places in the chain links and stays there. When the chains leave the bath, the surplus hot oil has to be removed. Not

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