TC bearing is one of the significant accessories in the screw power drilling tool for petroleum exploration. It mainly bears the radial load generated by the drive shaft of the power drilling tool in the process of operation, which the capacity has momentous effect in the service term of drillng tool .

Here are inner and outer bearing sleeve for TC bearing, the inner sleeve would be a pair with drive shaft and locked together, outer sleeve fit out with drilling tool underground, transfering the torque and speed of the motor to the drill bit. During the working process, TC bearings are subjected to axial and radial forces from universal bearings and drill bits,

It is required to have good wear resistance and corrosion resistance because it is subjected to the erosion of sand fluid for a long time. Therefore, TC bearing processing needs to take some effective measures to prevent wear.