If the bolt is used for a long time, it will rust. If it is only a small area of ​​rust, it will be fine, but if there is a large area of ​​rust, how to get the bolt. The following small series takes the Square Bolt as an example, sharing the following methods

First, the earthquake

First shake the rusted square bolts with force and do not force them with a wrench. The rusted bolts can't be screwed out even if you screw them hard, because the product materials and bolts are rusted inside and they are very strong. Forcibly twisting the square bolt may cause the bolt to slip, or the cross recess may be damaged. If it is a hexagon socket, it may cause damage to the inner hexagon. If we shake it first, we can shake off some rust first. The rust of the key parts is shaken off, and it will not be so laborious to screw it.

Second, knock

It is easy to loosen the nut by tapping the rusted square bolt with the edge of the square top hammer.

Third, burning

Some bolts are very hard to embroider. If the above method still does not work, the "fire attack" can be used. Use a gas-welding oxidizing flame to fully squash the square bolts and nuts, and then apply a trace of oil to the red-hot bolts. The purpose of heating the bolt is to thermally expand the bolt. The purpose of dripping oil is to make the bolt shrink rapidly in the cold, and increase the gap between the screw and the stainless steel nut. After the oil flows in, the nut can be unscrewed.

Fourth, welding

When removing the device, it is not uncommon to twist the square bolts. For bolts with broken tops, electric drills are generally not used, because the wire holes are drilled if they are slightly inadvertent.

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