How To Get Broken Screw Out

How to Get a Broken Screw Out: A Comprehensive Guide

Removing a broken screw can be incredibly frustrating, especially when it's in a hard-to-reach spot or vital to a piece of equipment. This comprehensive guide will provide you with various techniques to extract broken screws, from simple solutions to more advanced methods. Whether it's a stripped screw head or a completely snapped-off screw, we've got you covered.

Understanding the Problem: Why Screws Break

Before diving into extraction methods, let's understand why screws break in the first place. Common culprits include:

• Over-tightening: Applying excessive force during installation is a major cause of screw breakage.
• Stripped screw heads: Using the wrong size screwdriver or applying too much pressure can damage the screw head, making removal difficult.
• Corrosion: Rust and other forms of corrosion weaken the screw, making it more prone to breaking.
• Material fatigue: Repeated tightening and loosening can weaken the screw over time.
• Low-quality screws: Using cheap or inferior screws increases the risk of breakage.

Methods for Removing Broken Screws

The best method for removing a broken screw depends on the type of screw, the material it's embedded in, and the extent of the damage. Here are several approaches, from easiest to more advanced:

1. Using a Screw Extractor Set:

This is often the most effective method for completely broken screws. A screw extractor set contains specialized drill bits and reverse-threaded extractors. You'll drill a pilot hole into the broken screw, then use the extractor to grip and remove it. Remember to use a drill with a low speed and apply gentle pressure to avoid damaging the surrounding material.

2. Rubber Band Trick:

For slightly recessed screws with some head remaining, placing a rubber band over the screw head can improve grip. The rubber band increases friction, allowing your screwdriver to bite into the screw more effectively. This simple trick often works wonders.

3. Using a Different Screwdriver:

Sometimes, simply switching to a different screwdriver – perhaps one with a tighter fit or a different tip – can be enough to remove the screw. Try a variety of screwdrivers before resorting to more drastic measures. A high-quality screwdriver with a magnetic tip can also improve grip.

4. Hammer and Chisel (For Stubborn Cases):

This is a more aggressive method and should be used as a last resort. Carefully position a chisel against the broken screw and gently tap it with a hammer to loosen the screw. Exercise extreme caution to avoid damaging the surrounding material. This technique is best suited for larger screws.

5. Heat and Cool Technique:

Applying heat can expand the metal, potentially loosening the screw. Conversely, cooling it can contract it. Alternate between heating and cooling cycles. Be careful not to damage the surrounding material with excessive heat. This method works best when dealing with metal screws in metal.

6. Penetrating Oil:

For rusty or corroded screws, applying a penetrating oil like WD-40 can help loosen the screw. Allow the oil to penetrate for several hours or even overnight before attempting to remove it.

Preventing Broken Screws in the Future:

• Use the correct size screwdriver: Ensure the screwdriver bit perfectly matches the screw head.
• Don't over-tighten: Apply only the necessary force to secure the screw.
• Use high-quality screws: Invest in durable, well-made screws.
• Lubricate screws: Applying a lubricant before installation can prevent seizing and corrosion.

By following these tips and techniques, you'll be well-equipped to tackle those frustrating broken screws. Remember to choose the method best suited to your specific situation and always prioritize safety. Good luck!