You may not recognize the name of this manufacturer right away, but there’s a reason this 29-piece set ended up on my list. You have to be careful with the bits using in electric drills.These bits are well-built and provides longer service life.You will like the spiral flute design which is suitable for heavy-duty tasks.Decreasing feed pressure is beneficial and these bits can provide that with 135-degree split point.Less torque and easy drilling through tough materials are possible because of shorter cutting lips.That’s what makes them a perfect choice if you’re going to be cutting through tough metal. Made from M-42 5% cobalt high-speed steel, these guys are super tough and extremely resistant to abrasion. Furthermore, because of the different bit sizes included in this set, you’re all set for any drilling applications.īut undoubtedly, the most impressive thing about these bits is their construction. You will be enjoying faster chip ejection for a smooth and efficient job experience. There’s a lot to love about the spiral flute design of these things as well. Not only does this reduce the need for undue amounts of force, but it also noticeably reduces feed pressure. Just like the 316015, the 63221 drill bits also come with a 135-degree split point. Especially if you’re on the market for the best drill bits for metal, then this set is particularly going to appeal to you. This 21-piece set I am going to review next is also from Irwin, so you know it’s going to be good. In electric drills, users face some minor issues with these bits.It comes with a protective sturdy case so that one can carry them anywhere.With special treatments, you can use the bits for longer than its competitors.You can start drilling quickly with one 135-degree split point tip.To use the bits on hardened steel, they have cobalt construction.The set has bits with different sizes suitable for different applications.In the event of any unwanted friction-which won’t be happening any time soon anyway-just top them with lubricating oil, and you’ll be good to go. They have been designed to be extra resistant to abrasion and heat for longer.Īnd, even when you feel like they might have started wearing out, just a little bit of sharpening goes a long way. And because they start on contact, your project will be up and running in no time.Īs the bits are made from cobalt steel, you can expect a long life for their cutting edge. With a 135-degree split point tip, these bits ensure that you can cut with less force. This drill bit set offers commendable performance at very little maintenance. The first set of drill bits I’ve chosen for your consideration is a 15-piece set from Irwin, a name easily recognizable in the construction industry. If you’re unsure what you’re looking for though, scroll down to my buying guide for further assistance. So, after much research and analysis, I present my top picks of the drill bits most suitable for use with hardened steel. Top 10 Best Drill Bits for Hardened Steel Reviews Do note, however, that the durability of diamond-coated drill bits is unreliable.Īmong them, Cobalt is the top-recommended material here because of its hardness. This kind can cut through the majority of steel types. If you’re a DIYer, skipping this is a better idea. Furthermore, quite a bit of caution is required in handling carbide drill bits. One big drawback, though, is that it’s not suitable for hand drills. This material will be able to drill through every steel type, no matter how hard.
This type is also suitable for hand drills. As long as your drilling technique is sound, you can easily drill through normal steel. High-speed SteelĪ cheaper option, high-speed steel material, is usually coated with titanium. They are particularly suited to hand drills. Cobalt drill bits can drill through mild steel, tool steel, spring steel, and hardened steel. This is the most popular choice because of its versatility. Here are the main materials used in making drill bits. The more resilient the material is, the easier it will be for you to drill through-hardened steel, which can be a decidedly difficult task. The material from which the drill bit is constructed is of the highest importance because it will determine the level of performance and efficiency you can expect from the drill bit. 5.1 Related What Are the Available Drill Bit Materials for Drilling Hardened Steel?