The used raw material and the precision in manufacturing guarantee the bottom rollers quality. Saurer supplies hard-chrome plated bottom rollers for ring spinning machines and roving frames with extremely narrow tolerances.

Bottom rollers play a major role in ensuring yarn quality. Precise concentricity guarantees high yarn quality (evenness and strength). Equally influential to yarn breaks are the running conditions of the bottom rollers. Precise running bottom rollers allow to extend the spinning limits into finer yarn count ranges.