These devices are electro mechanical screw driven machines with precision screw and column construction and variable speed drive. Tow option are available mainly acme threaded screw with dc motor drive & ball lead screw with servo drive. The machines are ideal for studying mechanical behavior of various materials like metals, Polymers, Elastomers etc. These machines are simple to operate and they offer outstanding efficiency and flexibility to meet the criteria for the specifications of modern testing requirements. The machines confirm to is, Bs & astm standards. These machines are available with following options depending upon test requirements best combination, And budget is available for choice drive, Sd drive dd is with dc motor with thyrister drive to give speed ratio as per sample std. Requirement. Drive, Sd drive sd is with servo motor & pwm transister drive to give speed ratio as per sample std. Requirement.