How To Take Out A Broken Screw

How to Remove a Broken Screw: A Comprehensive Guide

Removing a broken screw can be frustrating, but with the right tools and techniques, you can successfully extract it without causing further damage. This guide covers various methods for removing broken screws, from simple solutions to more advanced techniques. This article will help you master screw extraction, saving you time and potential costly repairs.

Understanding the Problem:

Before diving into solutions, understanding why the screw broke is crucial. Common causes include:

• Over-tightening: Applying excessive force during installation.
• Stripped screw head: The screwdriver slipped, damaging the head's slots or recesses.
• Corrosion: Rust or oxidation weakens the screw, making it brittle.
• Low-quality screws: Inferior materials can lead to breakage under stress.

Methods for Removing Broken Screws:

The best method depends on the type of screw, the extent of the damage, and the tools you have available.

1. Simple Solutions (for slightly damaged screws):

• Improved Grip: Sometimes, a fresh, properly fitting screwdriver bit can provide enough grip to remove the screw. Try using a high-quality bit made of strong material, ensuring a perfect fit. Apply steady, even pressure. A magnetic bit might help hold the screw in place.
• Penetrating Oil: If the screw is rusted or seized, apply a penetrating oil like WD-40 and let it sit for several minutes (or even overnight) to loosen the screw. Then, try again with your screwdriver.

2. Intermediate Techniques (for moderately damaged screws):

• Rubber Band/Grip Enhancement: Place a rubber band over the damaged screw head. The added friction from the rubber band can improve the grip of your screwdriver.
• Screw Extractor: This specialized tool has reverse-threaded tips that grip into the damaged screw head. Select an extractor slightly smaller than the screw's diameter. Drill a pilot hole carefully, then insert and turn the extractor counter-clockwise.
• Left-Handed Drill Bit: A left-handed drill bit, also known as a reverse drill bit, can be used to carefully remove the broken screw. It works by gripping the remaining screw material and unscrewing it.

3. Advanced Techniques (for severely damaged screws):

• Dremel/Rotary Tool: If only a small portion of the screw head remains, you can carefully use a Dremel tool with a small cutting bit to create a new slot for a flathead screwdriver. Work slowly and precisely to avoid damaging surrounding materials.
• Easy-Out Screw Extractor: These are robust extractors designed for severely damaged screws. They utilize a more aggressive grip than standard extractors. These require precision drilling and careful application.
• Drilling Out the Screw: As a last resort, you may need to drill out the screw completely. This requires a drill bit slightly smaller than the screw's diameter. Drill carefully to avoid damaging surrounding material. Once the screw is removed, replace the material accordingly.

Prevention is Key:

Preventing broken screws is easier than removing them. Here are some tips:

• Use the right screwdriver: Select a screwdriver that perfectly matches the screw head type and size.
• Avoid over-tightening: Apply only the necessary force to secure the screw.
• Use high-quality screws: Invest in durable screws appropriate for the application.
• Lubricate screws: Applying lubricant can prevent seizing and make removal easier in the future.

Conclusion:

Removing a broken screw can be a challenging task, but with the right approach and tools, it's entirely manageable. By understanding the different methods and prevention strategies outlined above, you can confidently tackle this common DIY problem. Remember always to prioritize safety and proceed cautiously. Start with the simplest methods and progress to more advanced techniques only if necessary.