In repairing equipment, it is often encountered the problem of breaking bolts in the screw hole, the harmonic rotating servo harmonic FHA-17C-50-E250, especially the large bolt, is not easy to take out with the general method. Get inspiration from the screw thread rotation harmonic servo harmonic FHA-17C-50-E250, use in the bolt tapping a reverse screw thread, then screw a bolt, continue to force screw, screw out the bolt broken in the hole.

The method is to first punch a center hole with a sample on the end face of the bolt, and then expand the hole with a center drill to ensure the center position of the hole. Drill a hole with an appropriate drill, the hole depth is about 2/3 of the length of the bolt broken, and then tap the thread with a left tap, screw into the hole with a left bolt, The fHA-17C-50-E250 is rotated backwards with a wrench, and the broken bolt and the left-handed bolt are rotated out together under the action of the force.