Bolt breakage is a common mechanical problem caused by a combination of stress, corrosion, improper installation and long-term fatigue. Whether you’re working on a car, machinery, or a home project, removing damaged bolts can be a frustrating task. When a bolt breaks off – especially below the surface – it can be difficult to access or grab the remaining section, and traditional drilling or extraction tools are not always available or suitable for use.
Many people choose to use simpler techniquess Zero drilling. In some cases, drilling can damage the internal threads or surrounding material. Use techniques such as a vises Loosening a broken bolt or using the double-nut method to create a makeshift handle are both effective because they use leverage and grip rather than power tools. You can also apply a penetrating oil like WD-40, PB Blaster, or Kroil before work to help loosen rust and corrosion that holds the bolts in place. For many situations where bolts still have some thread exposure, these non-drilling methods are effective, preserve the original threads, and require only basic tools you probably already have in your basic home tool box.
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How to remove a broken bolt without drilling
Removing bolts with a wrench – OlegD/Shutterstock
The first method works if the broken bolt has threads sticking out of the material. You need a good vise with sharp and intact teeth. Place the vise tightly around the threads of the broken bolt and turn counterclockwise to back out the bolt. This works because you get direct torque on the bolt threads. If the bolt threads are still sticking out but you can’t grab them easily, you can try another method. For this method you will need two wrenches and nuts. First, screw the nut onto the damaged bolt until it is flush with the surface. Thread the second nut onto the first nut and tighten them together. Using two wrenches, one for each nut, turn them counterclockwise to remove the bolt. The two jammed nuts act as handles that can be grasped with a wrench.
If none of these methods work, you can use a hammer and chisel as a last resort. First, hold your chisel against the side of the bolt head. Then, strike the chisel with the hammer, driving the bolt counterclockwise. No matter which method you choose, there are several ways to help remove rusty or damaged bolts easily. Spraying penetrating oil on the bolts can help reduce corrosion or rust. You should also make sure your tools are in good condition—worn tools can slip easily, and you’ll need a sturdy handle for the task.
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