FIELD: rolled stock production, namely transmissions of rolling roll drive mechanism. SUBSTANCE: coupling unit includes spindle part and roll part with lengthwise grooves supporting inserts. Novelty is segmented beads on end portions of inserts. Said beads are arranged in annular turnings of roll parts of coupling. Said insert are fixed in coupling by means of through-type cover pressed into end of roll part. Sleeve is arranged in bottom portion of roll part. Sleeve is designed for receiving stem of roll portion for centering coupling onto it. EFFECT: enhanced reliability of coupling unit and equipment of main line of rolling stand. 4 dwg
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