Stripped, rounded-off, or rusted bolts can be a nightmare for even the most experienced DIYer. If you’ve found yourself in this predicament, don’t despair. Several effective techniques can help you remove a rounded bolt without damaging the surrounding material. These methods range from using specialized tools like bolt extractors to applying penetrating lubricants and employing creative solutions like rubber bands or pliers. In this comprehensive guide, we will explore the various approaches to unscrewing a rounded bolt, providing step-by-step instructions and helpful tips to ensure a successful outcome.
One of the most straightforward methods for removing a rounded bolt is to use a bolt extractor. These specialized tools are designed to grip the bolt’s edges, allowing you to turn it out even when the head is damaged. To use a bolt extractor, simply select the appropriate size for the bolt and insert it into the damaged head. Then, use a wrench or socket to turn the extractor counterclockwise. As the extractor bites into the bolt, it will gradually loosen and allow you to remove it. If you don’t have a bolt extractor, you can try using a pair of Vise-Grip pliers. Lock the pliers onto the bolt head and apply pressure to turn it counterclockwise. While this method may not be as effective as using a bolt extractor, it can be a viable option if you don’t have access to the proper tools.
In cases where the bolt is rusted or seized, applying a penetrating lubricant can significantly increase your chances of success. Penetrating lubricants, such as WD-40 or Liquid Wrench, work by seeping into the threads of the bolt and breaking down the rust or corrosion that is holding it in place. To use a penetrating lubricant, simply spray it onto the bolt head and allow it to sit for several minutes. Once the lubricant has had time to work, try using a wrench or socket to turn the bolt counterclockwise. If the bolt is still stuck, you may need to repeat the process several times. Additionally, applying heat to the bolt can help loosen it up. Use a heat gun or torch to heat the bolt, but be careful not to overheat it, as this could damage the surrounding material.
Identifying a Rounded Bolt
Recognizing a rounded bolt is crucial before attempting to extract it. Here’s a detailed examination of the key indicators:
1. Visual Assessment
Visually inspect the bolt’s head. A rounded bolt typically exhibits:
| Characteristic | Indication |
|---|---|
| Damaged Corners | Edges are worn down or completely absent, resulting in a smooth, rounded appearance. |
| Circular Cross-Section | The head appears circular rather than hexagonal or square, indicating significant wear. |
| Smooth Surface | The absence of defined corners and edges gives the bolt head a smooth, polished surface. |
2. Physical Examination
Use a pair of pliers or a wrench to gently grip the bolt head. If the tool slips easily without securing a firm hold, the bolt likely has a rounded head.
3. Lack of Engagement
Attempt to insert a socket or wrench onto the bolt head. If the tool does not engage with the corners or edges, the bolt is likely rounded and requires specialized removal techniques.
Using Vice Grips or Pliers
If you don’t have a bolt extractor, you can try using vice grips or pliers to remove a rounded bolt. This method is not as effective as using a bolt extractor, but it may work if the bolt is not too badly rounded.
To use this method, simply grab the rounded bolt with the vice grips or pliers and turn it counterclockwise. Be sure to use a lot of force, and be careful not to slip.
If the bolt is still too tight to turn, you can try using a penetrating oil to loosen it up. Apply the penetrating oil to the bolt and let it sit for a few minutes before trying to turn it again.
Using a Bolt Extractor
If the above methods don’t work, you can try using a bolt extractor. A bolt extractor is a tool that is specifically designed to remove rounded bolts.
To use a bolt extractor, follow these steps:
- Select the correct size bolt extractor for the bolt you are trying to remove.
- Drill a hole into the center of the bolt.
- Insert the bolt extractor into the hole and turn it counterclockwise.
- The bolt should come out easily.
Here is a table summarizing the steps for using a bolt extractor:
| Step | Description |
|---|---|
| 1 | Select the correct size bolt extractor for the bolt you are trying to remove. |
| 2 | Drill a hole into the center of the bolt. |
| 3 | Insert the bolt extractor into the hole and turn it counterclockwise. |
| 4 | The bolt should come out easily. |
Extracting the Remaining Bolt
7. Using a Bolt Extractor
A bolt extractor is a specialized tool designed specifically for removing rounded bolts. It consists of a hardened steel cone with spiral grooves and a reverse-threaded drill bit. Here’s a step-by-step guide on how to use it:
a. Center Punch: Position the center punch on the center of the rounded bolt head and strike it with a hammer to create a small indentation. This indentation will help guide the drill bit.
b. Pilot Hole: Use a drill bit that is slightly smaller than the extractor’s cone to drill a pilot hole into the bolt. Drill only deep enough to accommodate the cone.
c. Insert Extractor: Insert the extractor’s cone into the pilot hole and turn it counterclockwise using a wrench or socket. The reverse threads will bite into the bolt and loosen it.
d. Reverse Drill: If the extractor doesn’t loosen the bolt by hand, use a drill in reverse mode to apply more torque. Start drilling slowly and increase the speed gradually.
e. Lubrication: Apply a penetrating lubricant to the bolt and extractor to reduce friction and improve efficiency. Repeat the drilling process if necessary.
f. Extraction: Once the bolt is loosened, remove the extractor and use a wrench or pliers to extract the remaining bolt. If the bolt is still stuck, try increasing the drill bit size or using a larger extractor cone.
| Bolt Size | Extractor Cone Size |
|---|---|
| 1/4 inch | #1 |
| 5/16 inch | #2 |
| 3/8 inch | #3 |
| 1/2 inch | #4 |
Preventing Future Bolt Rounding
To prevent future bolt rounding, consider the following measures:
- Use the right tool for the job. A worn or improper wrench can easily slip and round a bolt. Make sure to use a wrench that fits the bolt head snugly.
- Apply even pressure. When tightening or loosening a bolt, apply even pressure around the entire head. Avoid using excessive force, as this can cause the bolt to slip and round.
- Use penetrating oil. If a bolt is particularly stubborn, apply a penetrating oil to the threads. This will help to loosen the bolt and reduce the risk of rounding.
- Tighten bolts gradually. When tightening a bolt, do not apply all of the torque at once. Instead, tighten it gradually to prevent the bolt from overtightening and rounding.
- Use anti-seize compound. Applying a small amount of anti-seize compound to the threads of a bolt before tightening it will help to prevent corrosion and make it easier to remove in the future.
- Use impact tools. Impact wrenches and drivers can be effective at loosening rounded bolts. However, use caution when using an impact tool, as it can easily strip the bolt threads.
- Use heat. Applying heat to a rounded bolt can help to expand the metal and make it easier to loosen. Use a propane torch or heat gun to heat the bolt, then try to remove it with a wrench.
- Drill out the bolt. In some cases, it may be necessary to drill out a rounded bolt. This is a last resort option, as it will damage the threads in the hole. However, it may be the only way to remove a severely rounded bolt.
| Method | Cost | Difficulty |
|---|---|---|
| Use the right tool for the job | Low | Easy |
| Apply even pressure | Low | Easy |
| Use penetrating oil | Low | Easy |
| Tighten bolts gradually | Low | Easy |
| Use anti-seize compound | Low | Easy |
| Use impact tools | Medium | Medium |
| Use heat | Medium | Medium |
| Drill out the bolt | High | Difficult |
Troubleshooting Tips
If you’re having trouble unscrewing a rounded bolt, there are a few things you can try:
9. Grip It with a Rubber Band
For round-head bolts, you can cover the head of the bolt with a rubber band to increase friction. Grip the bolt with a wrench or pliers and turn it counterclockwise to loosen it. The rubber band will help to fill in the gaps around the rounded head of the bolt, providing a better grip.
| Pros of Using a Rubber Band: | Cons of Using a Rubber Band: |
|---|---|
| Increases friction for better grip | May not be effective for heavily rounded bolts |
| Simple and inexpensive method | Can stretch or tear during use |
Here are some additional tips that may help you unscrew a rounded bolt:
* Use the right tools. Make sure you’re using the correct size wrench or pliers for the bolt.
* Apply downward pressure. As you turn the wrench or pliers, apply downward pressure to keep the tool from slipping.
* Use penetrating oil. Apply a penetrating oil to the bolt and let it sit for a few minutes before trying to loosen it. This can help to break down rust and corrosion.
* Heat the bolt. Applying heat to the bolt can help to loosen it. Be careful not to overheat the bolt, as this can damage it.
* Call a professional. If you’re unable to unscrew the bolt on your own, you can call a professional locksmith or mechanic.
Alternative Methods
10. Using a Bolt Extractor or Screw Extractor
Bolt extractors and screw extractors are specifically designed tools for removing rounded bolts. They are made of hardened steel and have a tapered or spiral design that bites into the damaged bolt. To use a bolt extractor, follow these steps:
a) Select an extractor that is slightly smaller than the rounded bolt.
b) Insert the extractor into the bolt and turn it counterclockwise with a wrench or pliers.
c) As the extractor bites into the bolt, it will start to loosen it.
d) Continue turning until the bolt is completely removed.
| Advantage | Disadvantage |
|---|---|
| Effective for removing severely damaged bolts. | Can be expensive and may not be suitable for all situations. |
| Requires precision and patience. | May damage the bolt or its surrounding area if not used properly. |
**How To Unscrew A Rounded Bolt**
When you are working on a project that requires you to remove a bolt, you may encounter a situation where the bolt has become rounded. This can make it difficult to get a grip on the bolt and remove it. However, there are a few tricks that you can use to unscrew a rounded bolt.
One trick is to use a pair of pliers. Grip the rounded bolt with the pliers and try to turn it counterclockwise. If the bolt is not too tight, you should be able to loosen it with the pliers.
Another trick is to use a hacksaw. If you can get the hacksaw blade into the rounded bolt, you can cut a slot into the bolt. Once you have cut a slot into the bolt, you can use a screwdriver to turn the bolt counterclockwise and remove it.
If the bolt is too tight for the pliers or the hacksaw, you may need to use a drill. Drill a hole into the center of the rounded bolt and then use a screw extractor to remove the bolt.
People Also Ask
How do you remove a rounded screw without a drill?
To remove a rounded screw without a drill, you can use a pair of pliers, a hacksaw, or a screw extractor.
What is the easiest way to remove a rounded bolt?
The easiest way to remove a rounded bolt is to use a pair of pliers or a hacksaw to grip the bolt and turn it counterclockwise.
How do you get a bolt out when the head is stripped?
If the bolt head is stripped, you can use a screw extractor to remove the bolt.
