In this paper the clamping forces of the HSK-E50 toolholder-spindle interface was first analysed and found the FEM analysis model. Then calculated the stress distribution of toolholder-spindle interface respectively effects by the spindle speed, interference and pull in force and finally find out how this three factors influence the connection characteristics of HSK-E50. The research results provide the designer a theoretical basis for designing and applying HSK tool system of the high speed spindle.

This paper introduces a methodology to evaluate and calculate the transmissible torque of the HSK-E tool system based on FEM. Calculation method of the transmissible torque and building of the FEM analysis model was first introduced. Using the model to analyze the effect of the interference, spindle speed, and drawbar force on the stress distributions of the contact surfaces of toolholder-spindle interface, then the transmissible torque is finally calculated. The results show that the HSK-E tool system satisfies high speed cutting requirements provided that reasonable parameters of the interference and the drawbar force are designed.