There can be a great deal of difficulty involved in removing a broken bolt or stud. When it comes to removing broken bolts, having the right drill bit can make all the difference.
As high-speed steel (HSS) and cobalt are able to withstand the high temperature and pressure generated during drilling, they are the best drill bits for this job.
The drill bit should also be designed specifically for removing broken bolts, such as a “screw extractor” or “bolt extractor” drill bit, which has a reversed spiral flute design that grips the broken bolt and pulls it out as you drill.
In this article we are going to review the best drill bits for drilling out broken bolts, a pilot point or a split point tip can help to prevent slipping while starting the drilling. The size of the drill bit should match the size of the broken bolt, so it is important to make sure you have the correct size before beginning the task.
5 Best Drill Bit For Drilling Out Broken Bolts
- IRWIN Tools 3018002 Cobalt M-35 Metal Index Drill Bit Set.
- Topec Screw Extractor / Drill Bit Set.
- SharCreatives Metric & SAE w/ Bolt Extractor Set.
- THINKWORK Screw Extractor / Drill Bit Set.
- PTSTEL Screw Extractors, Nut Removal, And Drill Bit Set.
Now we are going to discuss one-by-one all the features and which one is best for your task.
IRWIN: Best drill bit for broken bolt
Features:
The IRWIN Tools Cobalt Alloy Steel High-Speed Steel Drill Bit set is a comprehensive solution for drilling through tough metal surfaces. It is made from industrial-grade high-speed steel, the bits are extremely durable and resistant to heat and abrasion.
The set includes 8% cobalt alloy steel which increases the resistance to wear and tear.
The drill bits feature a 135-degree split-point tip that starts drilling immediately with less force, eliminating the “walking” across the work surface. The set comes with a metal index case for easy bit access and identification and includes drill bit sizes ranging from 1/16-inch to 1/2-inch in 1/64-inch increments.
This 29-piece set is perfect for heavy-duty abrasive alloy metal drilling on hardened steel and other tough metal surfaces.
Specifications:
- Material: Cobalt
- Brand: IRWIN Tools
- Finish Type: Cobalt Alloy Steel
- Dimensions: 12 x 7.5 x 4 inches
- Weight: 4.5 ounces
- Size: 29pc Pro Case
- Customer Rating: 4.7 out of 5 stars
Pros:
- Reasonable Price for what you want.
- This Drill bit Set contains a good quantity of bit sizes.
- Excellent bits are made with M35 cobalt rather than M42 bits.
- Highly recommend these drill bits
Cons:
- It was necessary to use the following smallest bit to complete the task on occasion after the bit fractured in half on the second bolt to withdraw.
TOPEC: Screw Extractor / Drill Bit Set for broken bolts
It includes 49 pieces, including screw extractors of various sizes, drill bits, and a holder for easy storage and organization. The set is made of high-quality materials for durability and long-lasting use.
It is suitable for use by professionals and DIY enthusiasts alike. This set can help you remove stubborn, stripped, rusted, or painted-over screws and bolts with ease.
Features:
The Topec 49pcs Screw Extractor/Drill Bit Set is a versatile toolset that contains 49 pieces, including nut removers, spiral, and multi-spline screw extractors, and left-hand cobalt drill bits.
The set has a variety of sizes, both metric and imperial, to fit different fastener sizes. The set is made of high-quality high-carbon steel and HSS materials that provide a strong grip for easy removal of fasteners of various metals.
However, it is important to note that cobalt drill bits should not be used on stainless steel. The set is suitable for a wide range of applications.
Specifications:
- Manufacturer: Topec
- Weight: 5.5 pounds
- Dimensions: 11.73 x 9.96 x 2.44 inches
- Material: High-carbon steel
- Customer Rating: 4.4 out of 5 stars
Pros:
- Very high quality
- The excellent kit has a huge assortment of screw extractors in different sizes.
- Everything is perfect
Cons:
- The drill bits suck too. Someone assumed it was a decent set but some people are used to the wrong method.
SharCreatives: Metric / Bolt Extractor Set For Broken Bolts
The SharCreatives 49 Pieces Metric & SAE w/ Bolt Extractor Set is a comprehensive toolset that includes various tools for removing tricky, stripped, damaged, and broken screws, bolts, studs, and fittings.
The set includes a range of metric and SAE bolt extractors, drill bits, multi-spline screw extractors, and a hex adapter.
The bolt extractors are designed to grip and remove stubborn fasteners with ease, while the drill bits allow for precise drilling and the multi-spline screw extractors are great for removing stripped screws.
The hex adapter allows for use with a variety of power tools. Overall, this set is a versatile and comprehensive toolset for anyone in need of removing tricky, stripped, damaged, and broken fasteners.
Features:
The SharCreatives 49 Pieces Metric & SAE w/ Bolt Extractor Set is a professional-grade toolset that is designed for heavy-duty use and features an impressive design and quality.
The bolt and screw removers in the set are made from Chromium-Molybdenum steel, which is rust-resistant and heat-treated for durability.
The drill bit set is made of HSS construction and is coated with titanium for added durability and capability. The set has a chatter-free design with staggered cutting teeth that ensures precise countersinking and a smooth, clean hole.
The set includes 49 pieces in total, including:
- 13 pieces of multi-size stripped lug nut removers with sizes ranging from 1/4” to 3/4”
- 13 pieces of multi-spline screw extractors with sizes ranging from 1/2” to 1/8″
- 6 pieces of spiral screw extractors with sizes ranging from #1 to #6
- 16 pieces of left-handed drill bits and extractors with sizes ranging from 1/2” to 5/64”
- 1 piece of a 3/8″-1/4″ hex adapter
The internal thread design of the set provides excellent torque and the more you turn, the tighter the socket grips, which works perfectly with 3/8″ air or power tools.
The set can be used with power drills, flat or Allen wrenches, and tap adapters, making it comfortable, convenient, and effective for a wide range of applications.
It can be used for removing most damaged, frozen, rusted fasteners including bolts, nuts, and screws. It is also suitable for various tasks with 3 kinds of different remover sets.
The set comes in a rugged, compact carry case for storage and portability. The tools are well organized in the case and it is easy to take it on the go.
This screw removal drill bit kit is ideal for both professional and personal use, it can be used for DIY projects at home, garden, workshop, and many more.
Specifications:
- Manufacturer: SharCreatives
- Material: Alloy Steel
- Dimensions: 14.13 x 10.24 x 2.13 inches
- Weight: 5.74 pounds
- Customer Ratings: 4.7 out of 5 stars
Pros:
- These bits are sharp. The whole set is really made well.
- All the bits are present with no wear or issues, and the case appears pristine.
- In this way, the bits stay in place when you move the case around while it is closed. It is also easy to remove the bits from the slots since they offer little resistance.
Cons:
- Probably, there are no cons to this Product
THINKWORK: Screw Extractor / Drill Bit Set For Drilling Out Broken Bolts
The THINKWORK Screw Extractor/Drill Bit Set is a 55-piece tool set that is designed to make removing stripped screws, studs, fittings, and lugs easy.
The set includes a variety of bolt extractors, drill bits, and other tools to help you remove even the most stubborn fasteners.
Features:
The THINKWORK Screw Extractor/Drill Bit Set is a comprehensive toolset designed for removing seized, broken studs, bolts, socket screws, and fittings.
The set is made of high-hardness chrome-molybdenum steel and high-speed steel for superior durability and strength. These materials are known for their ability to withstand high torque output without expanding, which helps to prevent breaking or jamming.
The extractors in the set are precision engineered to easily remove stubborn fasteners. They feature an aggressive left-hand design that creates extra gripping power, making it easier to remove even the most difficult fasteners. The extractors also feature easy-out style spiral flutes, which embed themselves in the fastener to increase grip as resistance increases. This design allows the extractors to fit in tight and hard-to-reach areas.
The set also includes a drill bit guide and long extractor pins that can reach tight and hard-to-reach areas. This allows you to remove fasteners in places where other tools won’t fit or can’t reach them.
The set comes with a heavy-duty blow-molded case that keeps all the tools organized and protected, making it easy to take them on the go.
Specifications:
- Manufacturer: THINKWORK
- Weight: 4.29 pounds
- Style: 55-Piece Screw Extractor Set
- Material: High-Speed Steel, Alloy Steel
- Dimensions: 11.69 x 8.07 x 2.01 inches
- Customer Rating: 4.4 out of 5 stars
Pros:
- These are the best drill bits. The ability to get proper torque and control with a wrench cuts the headache and time in half.
- Quick work of removing broken bolts.
- Solid cases and affordable prices made the purchase decision easy.
Cons:
- It works better than the cheap long ones but it just ended up breaking and made the problem much worse.
- The cutting edge is lower than the relief cut.
PTSTEL Screw Extractors, Nut Removal, And Best Drill Bit Set For Broken Bolts
Features:
The Screw Extractors, PTSTEL 49PCS Nut Removal And Drill Bit Set is a tool kit that includes a variety of different types of screw extractors and drill bits. It has made of high-carbon steel and HSS materials.
Screw extractors are tools that are used to remove stripped, damaged, or rusted screws and bolts. They work by gripping the head of the screw or bolt and turning it counterclockwise to remove it from the material.
This set includes multi-spline screw extractors, which are designed to remove screws with multiple splines or grooves in the head. These extractors have a series of grooves that grip the splines of the screw, allowing you to turn it counterclockwise and remove it.
This set also includes spiral screw extractors, which are designed to remove screws that are difficult to remove. Spiral extractors have a spiral flute that grips the screw as you turn it counterclockwise.
This set also includes Left-Hand Cobalt Drill Bits, which are made of high-speed steel with a cobalt coating. These drill bits are designed to be used in reverse, so they can be used to drill into screws and bolts to remove them.
Specifications:
- Manufacturer: PTSTEL
- Weight: 6.02 pounds
- Dimensions: 14.92 x 10.67 x 2.36 inches
- Customer Rating: 4.4 out of 5 stars
Pros:
- Very easy to use
- This Item set is well worth the money.
- Someone used it to remove a broken bolt in a pressure washer pump and has seen amazing results.
Cons:
- If you need it for automotive use I just recommend you buy another extractor from the above which I have described.
FAQ’s:
How do you drill out a broken bolt?
To drill out a broken bolt, you will need a drill and a left-hand drill bit.
- First, the center punches the broken bolt to create a small indentation for the drill bit to start in.
- Next, use a small drill bit to make a pilot hole in the center of the broken bolt.
- Then, change to a left-hand drill bit that is slightly smaller than the diameter of the broken bolt.
- Slowly drill into the broken bolt, using a steady and moderate speed.
- Keep drilling until the broken bolt is flush with the surface or can be easily removed with pliers.
How do you remove a rounded bolt or broken bolt in a deep hole?
To remove a rounded bolt or broken bolt in a deep hole, you can use a bolt extractor, stud extractor, Left-hand drill bit, Tap Extractor or EZ out.
These tools are designed to grip the head of a bolt and allow you to turn it counterclockwise. Be sure to use the correct size of the tool and be patient, as this can take time and effort.
What can I use to drill out a broken screw?
A screw extractor tool can be used to drill out a broken screw. It is a specialized tool that is designed to grip and remove stripped or damaged screws.
Do you need a special drill bit to drill out a screw?
You can use any kind of drill bit for drilling out a screw and on the other way, A special drill bit, called a screw extractor drill bit, is typically used to drill out a screw. These drill bits have reverse threading on the tip, which allows them to grip the broken screw and remove it when the drill is turned in the opposite direction of normal drilling. Other options include using a left-hand drill bit or using a center punch to create a new starting point for a standard bit.
Is there a drill bit that will drill through anything?
Drill bits that are not designed for heavy-duty, hard work will not cut through steel. Cobalt and titanium drill bits are the best choices for metalworking projects.
Conclusion:
I hope you have cleared the info about the best drill bit for drilling out broken bolts and hope you have decided to buy which one is best for your task. A cobalt drill bit is the best option for drilling out broken bolts. They are made of high-speed steel with a cobalt alloy and have higher heat resistance, making them ideal for drilling into hard materials such as stainless steel and cast iron. They are also more durable than regular high-speed steel bits.
Thanks for the reading.