SGT screw jacks 1.modular designed 2. lifting speed 0.05m/s 3.self-locking 4.maintance easy SGT screw jacks are modular designed ... to be suitable for any situation needed, lifting, lowering, pushing and extruding. Drive ... as high as 1000KN, the spindle length may achieve 10M, lifting speed 0.05m/s, and a higher speed can also ...