The straightener is equipped with 14 rolls. The rolls are situated in two planes, seven rolls in the first station, straightening in vertical direction, and seven rolls in the second station for straightening in the horizontal direction. The tube is bent three times in each direction.
(Note: do not compare with simpler devices with 6 roll pairs only.)
The straightener is driven by a AC-motor with a stepless speed control. Thereby, it can be synchronized with the machine onto which it is put (KOR, KOL-R, KOW), e g with the drive motor of a welding mill.