Ever faced a stubborn bolt that just won’t budge? You’ve tried everything – wrenches, penetrating oil, maybe even a little brute force. But sometimes, the only way to win the battle is to drill it out. It sounds simple, but choosing the right drill bit for this tough job can feel like a puzzle. Too weak, and it breaks. Too strong, and you damage the surrounding material. It’s a common frustration for DIYers and mechanics alike.
Picking the wrong drill bit can lead to broken bits, wasted time, and even ruined projects. That’s why we’re diving deep into the world of drill bits specifically designed for drilling out bolts. We’ll explore what makes them special and how to pick the perfect one for your needs. By the end of this post, you’ll feel confident in your ability to conquer those seized fasteners and get your project back on track.
So, if you’re ready to tackle those challenging bolts and learn the secrets to successful bolt removal, keep reading. We’re about to break down everything you need to know about drill bits for drilling out bolts.
Our Top 5 Drill Bits For Drilling Out Bolts Recommendations at a Glance
Top 5 Drill Bits For Drilling Out Bolts Detailed Reviews
1. DEWALT Drill Bit Set
Rating: 9.4/10
The DEWALT Drill Bit Set (DWA1184) is a 14-piece collection designed to tackle various drilling tasks. It features bits made from High Speed Steel, making them suitable for working with plastic, wood, and metal. The bits boast a 135-degree split point tip, which helps prevent the bit from “walking” or sliding when you start drilling. This set is built for durability, with a tapered web design to resist breakage and a black and gold coating to fight rust and wear. For larger bits, the 3-flats shank helps them grip better in your drill’s chuck. You can quickly find the right size thanks to the clear size markings on each bit.
What We Like:
- The 135-degree split point tip really helps start holes cleanly without the bit wandering.
- These bits are made from tough High Speed Steel, so they can handle wood, plastic, and metal.
- The tapered web design makes the bits stronger and less likely to snap.
- The black and gold coating looks good and keeps the bits from rusting.
- The 3-flats shank on larger bits (over 3/16-in) means they won’t slip in the drill chuck.
- Finding the right size is easy because each bit has clear size markings.
What Could Be Improved:
- While durable, the bits might wear down over time with very heavy-duty use.
- The set includes 14 pieces, but a few more common sizes could be useful for some projects.
Overall, this DEWALT drill bit set is a solid choice for DIYers and professionals alike. It offers reliable performance and thoughtful features that make drilling easier and more efficient.
2. DEWALT Titanium Nitride Coated Drill Bit Set
Rating: 9.1/10
Tackle any drilling job with confidence using the DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361). This set is built tough for DIYers and pros alike, offering a wide range of sizes for all your projects. The special coating makes these bits last longer, and the clever design means cleaner holes with less effort.
What We Like:
- The Titanium Nitride coating means these bits last much longer.
- The Pilot Point starts drilling right away, so holes are cleaner and neater.
- No spin shanks keep the bits from slipping in your drill.
- The tapered web design makes the bits stronger and less likely to break.
- You get a great variety of sizes, from tiny 1/16-inch to a solid 1/2-inch, all in a handy plastic case.
- This set includes two of the most common sizes (1/16″ to 1/8″), which is super useful.
What Could Be Improved:
- While durable, some of the smaller bits might still be prone to bending if too much force is applied.
- The case, while functional, could be designed with slightly deeper individual slots to better secure all the bits.
For a reliable and long-lasting drill bit set that simplifies your work, the DEWALT DW1361 is an excellent investment. It provides the versatility and durability you need for countless drilling tasks.
3. NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals
Rating: 8.8/10
Tackle tough drilling jobs with the NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set. This set is designed for drilling into hard metals like stainless steel, cast iron, and titanium. The stubby design helps you reach tight spots. The M35 cobalt steel ensures these bits last a long time.
What We Like:
- Made from strong M35 cobalt steel for extra durability and a long life.
- Stubby design lets you drill in hard-to-reach and tight spaces.
- 135° split point tip makes drilling start easy and fast without slipping.
- Works well on stainless steel and other tough metals like cast iron and titanium.
- 1/4-inch hex shank fits most standard and quick-change chucks and drivers.
- Comes with popular SAE sizes: 3/32″, 1/8″, 3/16″, 1/4″, and 5/16″.
- Special plastic box keeps bits organized and sizes are clearly marked.
- Box has a sliding clip for easy hanging on pegboards.
What Could Be Improved:
- This set only includes 5 common sizes; a wider range might be needed for some projects.
This drill bit set is a solid choice for DIYers and professionals who often work with hard metals. It offers good performance and convenience for its price.
4. UYECOVE 14 Pieces Screw Extractor Set
Rating: 8.8/10
Struggling with stubborn, stripped, or broken screws and bolts? The UYECOVE 14 Pieces Screw Extractor Set is here to save the day. This comprehensive kit, featuring left-hand drill bits, is designed to tackle those frustratingly stuck fasteners with ease. Whether you’re working on a car repair or a DIY project around the house, this set provides the tools you need to get the job done without damaging your workpiece.
What We Like:
- Diverse Sizes: You get a wide range of extractor sizes (19/64″, 1/4″, 3/16″, 5/32″, 1/8″) and spiral screw extractors (1#, 2#, 3#, 4#, 5#) to fit almost any situation. The impact drive is great for all kinds of jobs.
- Easily Remove Damaged Fasteners: This kit makes removing broken studs, bolts, and screws much faster. It works on both wood and metal, so you can tackle many different projects.
- Built to Last: The extractors are made from tough 35# Cr-Mo and 6542 HSS steel. This strong material is impact-resistant and can handle tough jobs.
- Convenient Storage: Everything comes neatly organized in a sturdy plastic box. It’s easy to carry with you wherever you go, making it perfect for car maintenance or home use.
- Reliable Customer Service: UYECOVE offers replacements or refunds for quality issues and promises to help solve any product problems within 24 hours.
What Could Be Improved:
- Instruction Clarity: While the set is generally easy to use, some users might appreciate slightly more detailed instructions on the best techniques for different types of stripped screws.
- Storage Box Durability: The plastic storage box is functional but could be more robust for very heavy-duty or frequent transport.
This UYECOVE screw extractor set is a valuable addition to any toolbox. It offers a durable and effective solution for removing damaged screws and bolts, backed by helpful customer service.
5. Makita B-65399 Impact Gold 14 Pc. Titanium Drill Bit Set
Rating: 9.2/10
Tackle tough jobs with the Makita B-65399 Impact Gold 14 Pc. Titanium Drill Bit Set. This set is built for serious work. It’s designed to handle a variety of materials, making it a versatile addition to any toolbox.
What We Like:
- The titanium nitride (TiN) coating makes these bits last a long time, about 2.5 times longer than regular bits.
- The 135-degree split point geometry helps you start drilling faster. It also stops the bit from slipping or “walking” around on your material.
- These bits are impact rated. This means they work great with 1/4-inch hex impact drivers, which are powerful tools.
- You can use them to drill holes in many different things. This includes metal like steel and cast iron, as well as wood, plastic, and non-ferrous metals.
- The set comes with 14 different drill bits, giving you options for many projects.
What Could Be Improved:
- While great for impact drivers, they might not be the absolute best choice for standard drill/drivers if you’re doing very delicate work.
- Sharpening these specialized bits at home can be tricky if they ever become dull.
The Makita B-65399 set offers impressive durability and performance for its price. These bits are a solid investment for anyone who needs to drill into tough materials regularly.
Drill Bits for Drilling Out Bolts: Your Guide to Breaking Free
Ever faced a stubborn bolt that just won’t budge? Drilling it out is often the last resort. But not all drill bits are created equal for this tough job. This guide will help you choose the right drill bits to conquer those seized fasteners.
Key Features to Look For
1. Size and Diameter
You need a bit that’s just the right size. Too small, and you won’t remove enough material. Too big, and you might damage the surrounding area. Start with a smaller bit to create a pilot hole, then use progressively larger bits.
2. Length
Some bolts are sunk deep. Make sure your drill bit is long enough to reach the entire length of the bolt you need to drill out.
3. Shank Type
The shank is the part that goes into your drill. Most common are round shanks. Hex shanks offer a better grip, especially with impact drills.
4. Point Type
A sharp, pointed tip helps the bit bite into the metal and start drilling easily. Some bits have a self-centering tip, which is a bonus.
Important Materials
1. High-Speed Steel (HSS)
HSS is a common and affordable material. It’s good for general-purpose drilling. For harder bolts, you might need something tougher.
2. Cobalt
Cobalt drill bits are an upgrade from HSS. They contain cobalt, which makes them harder and more heat-resistant. These are excellent for drilling into tough metals like hardened steel.
3. Carbide Tipped
These bits have carbide tips brazed onto a steel body. Carbide is extremely hard. They are best for very hard materials and can cut through almost anything, but they can be brittle.
Factors That Improve or Reduce Quality
Quality Improvement:
- Heat Treatment: Proper heat treatment makes bits stronger and more durable.
- Coatings: Some bits have coatings like titanium nitride (TiN) or black oxide. These reduce friction, improve heat resistance, and extend bit life.
- Precision Grinding: Sharper, precisely ground bits cut cleaner and faster.
Quality Reduction:
- Soft Metal: Bits made from softer metals will dull quickly and struggle with tough bolts.
- Poorly Ground Flutes: The flutes are the spiral grooves that remove debris. If they’re rough, they won’t clear material well.
- Warped or Bent Bits: These will cause uneven drilling and can damage your drill.
User Experience and Use Cases
Drilling out a bolt is a task that requires patience and the right tools. For simple, rusted bolts in softer materials, a good quality HSS set might be enough. For stubborn, seized bolts in hardened steel or in critical applications where you can’t afford to damage the surrounding material, investing in cobalt or even carbide-tipped bits is wise.
You’ll typically use these bits with a drill. A drill press can offer more stability and accuracy, which is helpful for precise drilling. Always wear safety glasses. Lubricant, like cutting oil, helps keep the bit cool and makes drilling smoother.
The goal is to drill through the center of the bolt. Once you’ve drilled out the bolt’s shank, you can often break the remaining head off or use an extractor to remove the threaded part.
Frequently Asked Questions (FAQ)
Q: What is the best type of drill bit for drilling out a bolt?
A: Cobalt drill bits are generally the best choice for drilling out bolts because they are hard and heat-resistant.
Q: Can I use a regular drill bit to drill out a bolt?
A: You can try with a good quality High-Speed Steel (HSS) bit for less stubborn bolts, but it will dull quickly on harder metals.
Q: What size drill bit should I use to drill out a bolt?
A: Start with a bit smaller than the bolt’s diameter to create a pilot hole. Then, use progressively larger bits until you reach the bolt’s shank size.
Q: Do I need a special drill for drilling out bolts?
A: No, a standard power drill works. A drill press offers more stability and accuracy.
Q: How do I prevent the drill bit from breaking?
A: Use a steady speed, apply consistent pressure, and use cutting fluid to keep the bit cool. Don’t force the bit.
Q: What is a pilot hole when drilling out a bolt?
A: A pilot hole is a small hole drilled first to guide the larger drill bit and prevent it from wandering.
Q: Can I reuse drill bits after drilling out a bolt?
A: Yes, but they will likely be duller. You may need to sharpen them or replace them depending on how much use they have had.
Q: What are bolt extractors?
A: Bolt extractors are tools used to remove broken bolts, often after you’ve drilled into them.
Q: Should I use lubricant when drilling out bolts?
A: Yes, using cutting oil or another lubricant helps reduce friction, keep the bit cool, and makes drilling easier.
Q: How deep do I need to drill into the bolt?
A: You need to drill through the entire shank of the bolt to weaken it enough to be removed.
In conclusion, every product has unique features and benefits. We hope this review helps you decide if it meets your needs. An informed choice ensures the best experience.
If you have any questions or feedback, please share them in the comments. Your input helps everyone. Thank you for reading.