FIELD: rollers and their cooling systems for variable-speed drives with toroidal raceways. SUBSTANCE: proposed roller device has roller fitted in race which is provided with several orifices, thus making it possible to supply coolant, oil for example from lubrication system of variable-speed drive. Coolant may be sprayed on roller race through hole in race and/or in two special spraying rods projecting from race. EFFECT: enhanced efficiency of cooling rollers. 12 cl, 6 dwg
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