This listing is for a NEW MORI SEIKI BS2051. Tailstock ball screw assembly designed for MORI SEIKI CNC lathes. Precision ground for accurate tailstock positioning and smooth linear motion. Ideal for service set replacements or upgrades. See photos for details. Part No: BS2051 Type: Tailstock Ball Screw Condition: NEW Application: MORI SEIKI CNC Lathe Tailstock Material: Hardened steel Thread Diameter: ~28–36 mm Thread Pitch: ~10–12 mm Length: ~800–1200 mm Please message us with any questions.