Aiming at the problem of insufficient rigidity of the tool system and unbalanced radial force during BTA machining process,a BTA deep hole connector was designed based on the fluid dynamic pressure lubrication principle.The connector included double-bridge strain gauges and tiltable tiles,which could increase the rigidity of the tool system by using the oil film support stiffness and offset the unbalanced radial force of synchronous detection by adjusting the oil film pressure in real time.The mathematical model of the tiltable tile was established,the oil film thickness equation was derived,and the oil film pressure calculation equation was further derived.The fluid simulation of the connector was carried out based on Fluent software,and the single factor experiment method was used to analyze the change law of the oil film pressure of tilting tile under different conditions.The results show that the oil film pressure can be adjusted by adjusting the parameters of workpiece speed,cutting fluid viscosity,tile tilt angle and tile wrap angle during BTA machining,so as to achieve the purpose of increasing the rigidity of the tool system and offsetting the unbalanced radial force.