Computer controlled heavy duty spring testing machine researched by wintime machinery co., ltd for vertical and lateral of railway spring also called locomotive springs which obtain proprietary technology and is corresponding with the european standard en13298. It is specially designed for heavy duty springs such as hi-speed rail springs or locomotive springs . Vertical & lateral drive and vertical force , lateral force deflection and stiffness measurement are available.Drawing of axial load , displacement or deflection , lateral force displacement curve is isochronous.Force sensor and ac servo motor and high precision ball screw vertical and lateral load , the whole process is automatic.