Description Overview Rieter R1 open-end spinning machines 4 units manufactured in 1995 4 units manufactured in 1996 Specifications 280 rotors each Rotor diameter 32 mm Ob20b opening rollers 2 piecers each Waxing device Uster mk c20-12 clearers Conicity 2 degree 1 machine with amsler stg-4000 slub device