FIELD: process engineering.
SUBSTANCE: invention relates to method and rolling mill for producing seamless steel tubes. Proposed rolling mill comprises one or several sequentially mounted stands of lengthwise or helical rolling and inner tool 2 used in rolling inside rolled material 1. Said inner tool 2 represents a mandrel rod 2a with mandrel 2b arranged at the front of affront said rod. Rotary motion 7, 7a is imparted to mandrel 2b, directed opposite the rotary motion 6 of rolled material 1.
EFFECT: preventing or at least minimising eccentricity or out-of-roundness.
9 cl, 4 dwg
