The video discusses various techniques for removing rounded Allen bolts. Before attempting to remove the bolt, it is essential to clean out any debris and use a good quality Allen key. If the bolt is stuck, applying heat or using a penetrating oil can help loosen it. The video also demonstrates methods such as shocking the bolt with a hammer and punch, using a left-handed drill bit, or welding a nut to the bolt.
Additionally, the video shows how to remove a counterbored bolt by drilling the head off and using pliers or a vise grip to remove the remaining part of the bolt. It also discusses the use of screw extractors, which can be effective but should be used as a last resort.
For small diameter bolts, a grub screw can be used to extract the bolt by burnishing and then extracting it. A center punch can also be used to create an indentation in the bolt head, allowing it to be removed.
The video emphasizes the importance of using proper safety equipment, such as safety glasses, and following correct techniques to avoid damaging the surrounding material or breaking the bolt.
Here are the key facts from the text:
1. There are different types of bolts that use an Allen key or hex key to undo them.
2. A counter-sunk bolt has a sunken head, while a cap head or socket head bolt has a visible head.
3. Before attempting to remove a bolt using an Allen key, it's essential to clean out the head to remove dirt.
4. A good quality Allen key is necessary for removing bolts, as cheap ones may not be effective.
5. Using the correct type of Allen key is crucial, as using an imperial key on a metric bolt can round off the head.
6. Heating the bolt or surrounding area can help loosen the bond between the bolt and material.
7. Penetrating oil can be used to loosen the bond between the bolt and material.
8. Safety glasses are necessary when working with bolts to protect the eyes from debris.
9. Shocking the bolt with a punch and hammer can help loosen it.
10. Applying heat to a thread-locked bolt can help loosen the thread locker.
11. A left-handed drill bit can be used to extract a screw in some situations.
12. A cobalt drill bit or solid carbide bit may be necessary to drill through hard materials.
13. A screw extractor can be used to remove a rounded or damaged screw.
14. A center punch can be used to create an indentation in a bolt head to help remove it.
15. Thread locker can be used to secure bolts in place, but it can make them difficult to remove.