Bolts are an essential component in various industries, from construction and manufacturing to automotive and aerospace. However, loosening a rounded bolt can be a frustrating and time-consuming task, especially if the bolt head has become damaged or stripped. Fortunately, there are several effective techniques that can help you loosen a rounded bolt without causing further damage. In this article, we will explore some of the most successful methods and provide step-by-step instructions on how to execute them safely and efficiently.
One of the most common methods for loosening a rounded bolt is to use a pair of locking pliers, also known as Vise-Grips. These pliers have interlocking jaws that provide a secure grip on the bolt head, even if it is rounded or damaged. To use locking pliers, simply position the jaws over the bolt head and squeeze the handles to tighten the grip. Once the pliers are securely in place, you can use a wrench or socket to turn the bolt and loosen it. Another effective method for loosening a rounded bolt is to use a bolt extractor, also known as an easy out. Bolt extractors are specifically designed to remove damaged or stripped bolts. They have a tapered, reverse-threaded design that bites into the bolt head as you turn it, creating a strong connection. To use a bolt extractor, you will need to first drill a pilot hole into the bolt head. Then, insert the bolt extractor into the pilot hole and turn it counterclockwise to loosen the bolt.
If the above methods fail to loosen the rounded bolt, you may need to use a more drastic approach, such as heat or impact. Applying heat to the bolt head can help to break down any corrosion or rust that may be holding the bolt in place. To heat the bolt head, you can use a propane torch or a heat gun. Once the bolt head is hot, you can try to loosen it using a wrench or socket. Alternatively, you can use an impact wrench to loosen the bolt. Impact wrenches deliver a series of high-torque impacts to the bolt head, which can help to break it loose. However, it is important to use an impact wrench carefully to avoid damaging the bolt or the surrounding components.
Preparing the Bolt and Tools
Tools Required:
| Essential Tools | Optional Tools |
|---|---|
| Impact Wrench or Socket Wrench | Penetrating Lubricant |
| Vice Grips or Adjustable Wrench | Heat Gun or Torch (Extreme cases) |
| Phillips or Flathead Screwdriver | Extractor Drill Bits |
| Hammer | Impact Driver |
Preparing the Bolt:
1. Clean the bolt and surrounding area thoroughly to remove any dirt, rust, or debris.
2. Apply a penetrating lubricant liberally around the bolt head and allow it to soak for several hours or overnight. This lubricant will help dissolve rust and corrosion.
3. If the bolt is in a tight or difficult-to-reach location, use an extension bar or adapter to provide leverage.
4. If possible, use a 6- or 12-point socket instead of a 4-point socket, as it will provide better grip on the bolt head.
5. Use a cheater pipe or breaker bar for additional leverage, but be careful not to apply excessive force that could damage the bolt or surrounding components.
Using a Bolt Extractor
A bolt extractor is a specialized tool designed to remove broken or damaged bolts. It consists of a fluted cone with a spiral-shaped cutting edge. The extractor is inserted into the bolt and turned counterclockwise to bite into the metal. As the extractor is turned, it cuts a new groove into the bolt, allowing it to be unscrewed.
To use a bolt extractor, follow these steps:
1. Select the correct size of extractor for the bolt. The extractor should be slightly smaller in diameter than the bolt hole.
2. Insert the extractor into the bolt hole and turn it counterclockwise.
3. Gradually increase the force applied to the extractor until it bites into the metal.
4. Continue turning the extractor counterclockwise until the bolt is loosened.
If the bolt is still stuck, you may need to use a lubricant or heat to help loosen it. You can also try using a left-handed drill bit to remove the bolt.
If you are unable to remove the bolt using a bolt extractor, you may need to drill it out. This is a more difficult procedure, but it can be done with the right tools and skills.
Tips for Using a Bolt Extractor
Here are some tips for using a bolt extractor:
| Tip | Description |
|---|---|
| Use a sharp extractor. | A dull extractor will not be able to cut into the bolt and may damage the bolt hole. |
| Apply gradual force. | Do not try to force the extractor into the bolt. This could damage the bolt or the extractor. |
| Use a lubricant. | A lubricant will help to reduce friction and make it easier to remove the bolt. |
| Use heat. | Heat can help to expand the bolt and make it easier to remove. |
Creating New Grips with a Dremel Tool
When all else fails, you can use a Dremel tool to create new grips on a rounded bolt. This is a more advanced technique that requires some experience with power tools. Here are the steps to follow:
- Mark the center of the bolt: Use a sharp object to make a small mark in the center of the bolt head.
- Cut a slot in the bolt: Using a Dremel tool with a cutting wheel, carefully cut a slot into the bolt head. The slot should be about 1/4 inch wide and 1/2 inch deep.
- Insert a flathead screwdriver: Insert a flathead screwdriver into the slot and turn it counterclockwise to loosen the bolt.
- Use a vice grip: If the screwdriver is not strong enough to loosen the bolt, you can use a vice grip. Place the jaws of the vice grip around the bolt head and turn it counterclockwise.
- Heat the bolt: Heating the bolt can help to loosen it. Use a propane torch to heat the bolt for a few seconds. Then, try to loosen it with a screwdriver or vice grip.
- Use a penetrating oil: Penetrating oil can help to loosen a rounded bolt. Apply a few drops of penetrating oil to the bolt and let it sit for a few minutes. Then, try to loosen it with a screwdriver or vice grip.
- Drill out the bolt: If all else fails, you can drill out the bolt (See Table 1). This is a last resort, as it will damage the bolt and the threads in the hole. To drill out the bolt, use a drill bit that is slightly smaller than the diameter of the bolt. Drill into the bolt head until you reach the threads. Then, use a screw extractor to remove the bolt.
| Drill Bit Size | Bolt Size |
|---|---|
| 1/16 inch | #4 bolt |
| 5/64 inch | #6 bolt |
| 3/32 inch | #8 bolt |
| 7/64 inch | #10 bolt |
| 1/8 inch | #12 bolt |
How to Loosen a Rounded Bolt
When a bolt becomes rounded, it can be difficult to remove it. However, there are a few methods that can be used to loosen a rounded bolt. Using the right tools and a little patience, you can easily remove a rounded bolt.
- Use a Bolt Extractor: This is a specialized tool that is designed to remove rounded bolts. It has a tapered tip that is inserted into the bolt and then turned. As the extractor is turned, it bites into the bolt and loosens it.
- Use a Hammer and Chisel: This method is less precise than using a bolt extractor, but it can be effective. Place the chisel on the edge of the bolt and tap it with a hammer. The chisel will create a notch in the bolt, which will give you a place to insert a screwdriver or wrench.
- Use a Dremel Tool: This method is only recommended if you have a Dremel tool. Cut a slot in the bolt using the Dremel tool. You can then use a screwdriver or wrench to loosen the bolt.
People Also Ask About How to Loosen a Rounded Bolt
Can I use pliers to loosen a rounded bolt?
Yes, you can use pliers to loosen a rounded bolt. However, this method is not as effective as using a bolt extractor or a hammer and chisel.
What is the easiest way to remove a rounded bolt?
The easiest way to remove a rounded bolt is to use a bolt extractor. This tool is specifically designed to remove rounded bolts and is very effective.
Can you use WD-40 to loosen a rounded bolt?
Yes, you can use WD-40 to loosen a rounded bolt. However, it is important to note that WD-40 is not a lubricant and will not make the bolt any easier to turn. WD-40 can help to break down any rust or corrosion that may be holding the bolt in place.
