valtsimine tingimustes, kus nurk valtside pinna ja tooriku telje suunaliste kiirusvektorite vahel kontaktpinna punktis on 0° (vrdl ristivaltsimine; kaldvaltsimine), a type of rolling, for which tha angle beween the rotational velocity vector of roll surface and the axial component of the velocity vector of the metal at the contact point equals zero, and the axes of the rolls lie in a plane perpendicular to the axis of rolling (compare: cross rolling; helical rolling)