Was rusty rust, the screwdriver are turning how to do, is a very important thing
Drop a few drops of oil or gently knock around a few times, to the rusty screw drops (to bubble better) gasoline or kerosene, washing the use of oxalic acid also
Red: some of the top of the device screw corrosion to take shape, can not use wrenches, wire clamp discharge, both the impact method. First with a hammer and through the top of the cone in the vertical direction of the screw impact of a v-shaped groove. Then, adjust the chuck angle, along the direction of the screw out of the impact, see Figure 2. To be loose, you can use the wire clamp to screw out the screw. "A" or "ten" when the screw slide, you can also use this method, combined with the wire clamp screw out the screw.
Burning: some screw embroidery is very serious, with the above method is still ineffective, you can use the "fire attack." Put the screws and nuts thoroughly with gas oxidation flames, then drop a few pieces of oil into the red screw. The purpose of the heating screw is to heat the screws. The purpose of the drip is to quickly shrink the screws cold, increase the gap between the screw and the nut, the oil into the back nut can be unscrewed. But if there are plastic devices near the use of this method
1 shock: for the rusty screws, do not use a wrench hard to prevent the screw screw six edges and corners, screw off the screw or wrench bad wrench. At this point, you can use the hammer gently shake the handle of the wrench, the general rust-proof screws can be twisted under the vibration. 2 knock: with the edge of the top hammer, knocking the corrosion of the nut, it is easy to loose nut. For example, the bike's feet at both ends of the fixed bolt nut, according to the foot pedal thickness, metal structure, grasp the size of the force hit the nut. Cast iron at the nut can be slightly larger force, plastic to gently beat. If you still can not, then use the hammer along the direction of the circle beat the nut, you can easily remove the nut.
welding: disassemble the device, the screw off the situation is not uncommon. On the top of the screw, generally do not use electric drill, because a little accident will drill bad silk hole. The better way is to weld a long piece of iron on the wire. The cross section of the iron block is exactly the diameter of the screw. There are still selling loosening agent, but also very useful.
