Dismantling the broken head screw When the broken head screw has a large diameter and is relatively loose, use a hand hammer and a flat chisel to slowly remove the thread in the opposite direction. If the broken end is higher than the end face, it can be twisted out into a square shape, or a nut can be screwed out on the breakage head. If the breakage is less than the end surface or there is no outcrop, drill a hole in the breakage head and then wedge it into a multi-edge hardened steel file. Unscrew the reversed screw with a reverse screw. When it is allowed to increase the screw hole, drill the broken screw with a drill and increase the thread again. To disassemble the screw set to prevent the fastener from being deformed due to uneven force, the screw set should be disassembled symmetrically diagonally. When disassembling, first loosen the screws 1 to 2 and then remove them one by one. For square or round parts, symmetrically disassembled according to the diagonal or the center of the circle; for long strips, the parts can be gradually loosened and disassembled from the two sides to the middle or from the middle to both sides in symmetrical and diagonal lines. Replace the screws in the hard-to-remove area and loosen and remove them first. When disassembling the cantilever-shaped multi-screw couplings, they should be loosened one by one in a symmetrical position starting from the lower edge. The uppermost one or two screws should be removed last, otherwise it is easy to cause accidents or parts deformation and damage. China leading manufacturers and suppliers of Active Pharmaceutical Ingredient, Mupirocin , Mupirocin Calcium, and we specialize in Sodium Fusidate, Fusidic Acid. Active Pharmaceutical Ingredient, Mupirocin, Mupirocin Calcium, Fusidic Acid, Sodium Fusidate Manufacturer Fuzhou Contay Biotechnology Co., Ltd , https://www.contaybio.com
Three tips for dismantling screws on farm machinery
Remove the rusted bolts and nuts before soaking in kerosene for 20 to 30 minutes. Hammer around the nut with a hand hammer, loosen the rust layer and unscrew it. If it cannot be removed, use a torch to heat the nut. When the nut is heated and the screw is heated, remove the nut quickly. If it is a threaded slide fastener, drill an enlarged hole in the threaded hole and remake the thread. Then prepare a stepped bolt with one end enlarged and the other end kept the original diameter. The original screw hole is enlarged, then a nut with internal and external threads is processed, the external diameter matches with the enlarged screw hole, the internal screw hole is the same as the original diameter, the 502 adhesive is coated on the external thread, and then screwed into the enlarged screw hole.