Many people have encountered the situation where they want to unscrew a screw, but find it's rusted and impossible to remove. Today, we'll share some tips on how to easily unscrew rusted screws. Let's take a look!
1. First, use a wrench to tighten the screw, then tap the wrench handle with a hammer. After a few taps, the rust inside will loosen, making it much easier to unscrew.
2. You can also use a heat method. Heat the screw and nut thoroughly with an oxidizing flame from a gas welding torch for a while, then drip a few drops of oil onto the red-hot screw to allow it to cool quickly. This increases the gap between the screw and nut, making it easier to unscrew.
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3. If the screw is stripped, you can place a small piece of rubber on it to increase friction.
4. You can also try using vinegar to remove rusted screws. Sprinkle vinegar on the rusted screw; it will dissolve some of the rust. After a while, turning the rusted screw will be much easier. If the above methods fail, specialized tools will be needed:
5. Use a nut splitter. A nut splitter is a specialized tool for cutting and removing rusted nuts that cannot be disassembled. It consists of a hydraulic cylinder, a cutter, and a blade holder. Using a single-acting, return-type hydraulic cylinder, it cuts the nut in half in one go without damaging the threads or the bolt, efficiently solving the problem of disassembling and replacing bolts and nuts.
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Specific usage instructions:
Open the oil filler plug, fill the manual oil pump box with hydraulic oil, and close the unloading valve;
Place the head hole of the splitter onto the nut to be split, and place it upright and flat;
Pump the manual oil pump to push the splitter forward and into the nut. When the splitter is halfway into the nut, carefully pump the pump to avoid excessive force that could quickly split the nut and damage the bolt threads;
When you hear a "snap" sound, it means the nut has been split, stop pumping;
Unscrew the unloading valve, the splitter will return to its original position, remove the splitter, and the work is complete.
6. Use screw loosening agent. Screw loosening agent is a liquid chemical that acts on the contact surface between the screw and the tool, increasing contact friction. After use, it can increase friction by 500 times, more than enough to deal with ordinary stubborn screws. If used in conjunction with rust remover, lubricant, etc., the effect will be even more significant.
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7. Using a thread repair tool.
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Let's dissect it and take a look.
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Adjust and clamp.
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Tighten one turn, then another.
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Tighten.
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8. Using a bolt chamfering tool to chamfer damaged or rusted bolts.
Image Rusty bolts, chamfering, and nuts on a construction site.
Image Image Chamfering two bolts of different diameters.
9. Removing rusted nuts using induction heating. This method is simple to operate and suitable for disassembling or installing various metal parts, such as drive components, bearings, bearing housings, gears, bolts, nuts, pipes, and small parts.
It has wide applications and is suitable for confined spaces. It can precisely heat localized areas, allowing areas outside the heated workpiece to maintain their original temperature; the heated workpiece expands and loosens, facilitating disassembly or installation. It is especially ideal for bolts and nuts.
