ROTRA Ihr Partner für Automation seit 1987 RO tation + TRA nslation = Automation Ball Screws We supply products of KURODA  Precision Industries Ltd. (Japan) High quality ground and rolled ball scews for the automation industries. NEW: F series - innovative design for low noise at high speed. Input speed up to 5000 rpm for diameters up to 25 mm. Recommended - GG and GE ground - GW and GY rolled series Very high lead The ground ball screws of the HG series enable high speed. 1 m/sec at 1000 rpm with small stepping motors possible. back to product overview ROTRA Your partner for automation since 1987