Spring Test Home Products Spring Test Static STM-20 2 ton electric tension and pressure servo SST-10P Pneumatic 1 ton Dynamic Servo Mechanical Axial Fatigue Testing Machine for Springs – SAF-5M (500 Kg) Tensile 100 ton Servo Hydraulic Axial Fatigue Testing Machine – SAF-25B (2.5 Tons) Tensile 100 ton Servo Hydraulic Axial Fatigue Testing Machine – SAF-10B (1 t) Fatigue 1 ton