What To Know
- It involves using a drill to bore a hole into the broken fastener, then extracting it using a special tool called an extractor.
- Use a drill press or a drill guide to ensure stability.
- You can also apply masking tape or center punch the fastener to create a starting point for the drill bit.
Drill out is a technique used to remove broken screws, bolts, or studs that have snapped off or become stuck. It involves using a drill to bore a hole into the broken fastener, then extracting it using a special tool called an extractor.
Why Use Drill Out?
Drill out is necessary when other methods of fastener removal, such as using pliers or a screw extractor, have failed. It is also the preferred method when the broken fastener is deeply embedded or difficult to access.
How to Drill Out a Broken Fastener
Materials Required:
- Drill
- Drill bits (various sizes)
- Extractor
- Lubricant (e.g., WD-40)
Steps:
1. Safety First: Wear safety glasses and gloves.
2. Lubricate the Fastener: Apply lubricant to the broken fastener to reduce friction.
3. Select Drill Bit: Choose a drill bit that is slightly smaller than the diameter of the fastener.
4. Drill a Pilot Hole: Drill a small pilot hole into the center of the broken fastener.
5. Increase Drill Bit Size: Gradually increase the drill bit size until you reach the diameter of the fastener.
6. Insert Extractor: Insert an extractor into the hole and twist it counterclockwise to engage the threads.
7. Extract Fastener: Slowly and steadily pull the extractor to remove the broken fastener.
Common Problems and Solutions
Broken Drill Bit:
- Use a smaller drill bit to remove the broken piece.
- Reverse the drill and slowly extract the broken bit.
Stuck Extractor:
- Apply more lubricant.
- Use a larger extractor or a pair of pliers to grip and remove it.
Fastener Won’t Budge:
- Increase the drill bit size slightly.
- Apply heat to the fastener using a heat gun or torch.
- Use a penetrating oil to loosen the threads.
Safety Precautions
- Always wear appropriate safety gear.
- Use sharp drill bits and extractors to prevent damage.
- Secure the workpiece firmly before drilling.
- Do not apply excessive force when extracting the fastener.
Tips for Success
- Use a drill press or a drill guide for greater precision.
- Start with a small drill bit and gradually increase the size.
- Apply lubricant regularly to prevent overheating.
- Be patient and don’t rush the process.
Final Note: The Power of Drill Out
Drill out is an effective and versatile technique for removing broken fasteners. By following the steps and precautions outlined in this guide, you can successfully extract even the most stubborn fasteners. Remember, patience and precision are key to success.
Popular Questions
Q: Can drill out be used on all types of fasteners?
A: Yes, drill out can be used on most types of fasteners, including screws, bolts, and studs. However, it is not recommended for hardened fasteners or fasteners made of exotic materials.
Q: What is the best drill bit to use for drill out?
A: Use high-quality drill bits made of cobalt or carbide. These bits are stronger and more durable than standard drill bits.
Q: How do I prevent the drill bit from slipping?
A: Use a drill press or a drill guide to ensure stability. You can also apply masking tape or center punch the fastener to create a starting point for the drill bit.
