Removing a stripped screw can be frustrating, but a screw extractor is the perfect tool for the job. This guide provides a clear, step-by-step process to help you tackle even the most stubborn screws. We'll cover choosing the right extractor, proper technique, and troubleshooting tips.
Understanding Screw Extractors
Screw extractors, also known as screw removers, are specialized tools designed to remove damaged or stripped screws. They typically consist of a hardened steel drill bit with a reverse-threaded tip. This reverse thread bites into the damaged screw, allowing you to unscrew it easily. There are several types available, including:
- Left-handed drill bits: These are designed to work directly into stripped screw heads.
- Extractor sets: These kits offer a range of sizes to accommodate various screw sizes.
- Self-centering extractors: These tools help ensure accurate placement, reducing the chance of further damage.
Choosing the Right Screw Extractor
Selecting the appropriate extractor is crucial for success. Consider these factors:
- Screw Size: Measure the diameter of the stripped screw to choose an extractor that’s slightly smaller. A slightly smaller bit ensures a tight, secure grip.
- Material: The material of the screw will influence the type of extractor needed. Hardened steel extractors are ideal for tough materials.
- Extractor Type: Choose a type that matches your screw and your comfort level. Self-centering extractors are recommended for beginners.
Step-by-Step Guide to Using a Screw Extractor
Let's tackle that stubborn screw! Follow these steps for optimal results:
-
Prepare the Area: Clear the surrounding area of any obstructions. Ensure you have a stable working surface.
-
Center the Extractor: Carefully center the extractor bit over the stripped screw. If using a self-centering type, this step is largely automated. For other types, use a center punch to create a small indentation for accurate placement.
-
Drill Slowly and Carefully: Begin drilling slowly, applying gentle pressure. Avoid excessive force, which can damage the extractor or the surrounding material. The goal is to create a pilot hole for the extractor's reverse threads to grip.
-
Reverse the Drill: Once the extractor is firmly seated, switch the drill to reverse. Slowly and carefully back out the screw. You may need to apply some counter-pressure to prevent the extractor from spinning freely.
-
Remove the Extractor: Once the screw is removed, carefully remove the extractor from the hole.
Troubleshooting Common Issues
Even with careful technique, issues can arise. Here are some solutions to common problems:
- Extractor Breaks: If the extractor snaps, use a different size or type, ensuring it's a proper fit. You may need to drill the broken piece out.
- Screw Doesn't Budge: If the screw remains stubborn, try applying penetrating oil to loosen it before attempting extraction again. Allow the oil time to penetrate.
- Surrounding Material Damage: Work slowly and carefully to minimize the risk of damaging surrounding material. A pilot hole helps control the extractor.
Conclusion
Removing stripped screws is easier with the right tools and techniques. By following these steps and choosing the correct screw extractor, you can successfully remove even the most stubborn screws, saving time and frustration. Remember patience is key!
