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For example, in the lower bearing of a car steering gear, it is a "dead end". When the bearing retainer falls apart, the balls converge to one side. When disassembled and replaced, the inner sleeve and outer sleeve of the bearing are no longer one piece. At this time, the only thing left in "Dead End" was the coat of the bearing. But it is more difficult to take it out because there is no way to do it! Here, I tell you a trick: The first step is to use a vernier caliper to measure the diameter of the inner hole of the bearing sleeve, for example, it is 55MM. The second step is to saw an iron plate about 20MM wide, 5MM thick, and 60MM long. The third step is to make a "center pit" in the center of the iron plate. The fourth step is to use the "Central Pit" as the center of the circle and use the circle to plan an original arc with a diameter of 58MM. Step 5: On the grinder, trim off the excess parts other than the original arc according to the original arc. Step 6: Use a hammer to bend the iron plate (note that the bend must be even) and use a vernier caliper to measure the length of the iron plate after bending, so that the size is 55.5MM. Step 7: Use a 5mm drill bit to drill a hole in the "center pit". And use M6 tap to set the buckle. The eighth step is to find a long M6 screw with a through buckle and screw it in from the concave surface of the iron bar (the head is just exposed). The ninth step is to press its convex surface toward the "dead end" direction into the "ball groove" of the bearing outer ring. In the tenth step, turn the long screw in the direction of "Tightening". At this time, the bearing jacket in the "dead end" will come out on its own! The principle of applying this method is that when selecting iron bars, the diameter of the inner hole of the bearing outer ring should be flexible. When the diameter of the inner hole of the bearing outer ring becomes larger, of course the iron bars become wider and thicker. (Note that the screws will also be adjusted accordingly.) What also needs to be adjusted is the flexible length of the iron plate according to the diameter of the inner hole of the bearing outer ring. Do not throw away this "small device" after use, it can be used for a long time. Friends, please use "draw inferences from one example to other cases" flexibly!