Cobalt bits are a combination of steel (or another alloy) mixed with a small percentage of cobalt, typically between 5 – 7%. Cobalt has a melting point of 1495°C and a boiling point of 2927°C, which makes it perfect for use at high temperatures. By combining a small amount of cobalt with another alloy, the results are incredible.

It’s not the cheapest option on our list, but if you’re looking for a sharpener that can accept a wide range of bits, the Drill Doctor 750X is a great choice.

HSS bits are hardwearing and heat resistant. The large concentrations of chrome and nickel in stainless steel ensure that HSS bits are super strong and durable. HSS drill bits are capable of safely drilling through hardwood, some metals and plastic. They’re safe to operate at high speeds (RPM) and provide long-lasting performance – as long as they are maintained.

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The strength of cobalt means that drill bits are better suited to the tough challenge of cutting through steel. Cobalt bits aren’t suitable for general applications. For less intensive operations, like drilling through wood, plastic or light metals, an HSS drill bit is perfect.

If you can’t afford or don’t need any of the sharpeners above, this Drill Bit Sharpener might be for you. It’s powered by your drill and doesn’t require an electrical outlet, so it’s convenient for off-site projects with limited electricity. It’s not as accurate as a dedicated or bench grinder drill bit sharpener, but in a pinch it’s certainly better than nothing.

For versatility, it’s hard to beat the Drill Doctor X2 with its dual-speed motor. In addition to the dedicated bit sharpening port, this sharpener includes separate guides for sharpening knives, scissors and other edged tools. To sharpen drill bits, insert the bit into the chuck, press it directly into the sharpening port and start sharpening!

Unlike other sharpeners that offer one or two angles, you can customize this sharpener to create to any angle from 115 to 140 degrees. The 750X is large enough to accept bits up to 3/4-in., and it can create or sharpen split-point bits.

Luckily, a good drill bit sharpener can not only get them back in shape, but reinvigorate bits that snapped in half during aggressive use.

Cobalt drill bits are incredibly strong. They can be operated at much higher speeds than a standard HSS drill bit. The ability to withstand heat means that cobalt bits perform for long periods without cooling or the need for cutting fluid.

The cutting edge on a good quality cobalt bit should last for longer than a standard HSS bit. Like other HSS bits, they are corrosion-resistant, which means they should retain their condition in all storage and usage conditions they’re likely to experience. However, cobalt can be brittle. If your cobalt drill bits aren’t cared for properly or are dropped, they can break – which can prove costly.

The Drill Doctor 500X is our best overall choice, regardless of your skill level, for its mid-range price and the variety of bits it accepts.

Sturdy, hardwearing and robust, modern metal drill bits can cut through the toughest materials with no trouble. When it comes to drilling, selecting the right tool for the job is crucial. In this article we describe the difference between High-Speed Steel (HSS) and cobalt drill bits, their strengths and weaknesses, and when you should use them.

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HSS and cobalt drills need to be cared for and maintained to ensure they deliver consistent performance. Even the hardest wearing materials can become blunted or dulled after a period of hard work. Using the correct drilling technique improves the lifespan of any drill bit.

There are more types of drill bit sharpeners than you might think. Some are more useful than others, depending on your specific bits and experience level. Make sure you’re choosing the best one for you. Here’s what to look for:

This affordable Wen BG4276 bench grinder provides two grinding wheels for a fraction of the cost of similar options. A large, adjustable work light ensures you have a clear view of your workpiece. With 60-grit and 36-grit wheels, you can sharpen lots of tools well as drill bits.

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Instead of holding the bits in your hand, this attachment holds them for you. Its straightforward adjustment settings make it easy to select the angle, although it’s not ideal for use with bits smaller than 1/8-inch.

This six-inch DeWalt DW756 has the power to tackle various sharpening tasks, including drill bits. Safety guards reduce the chances of dangerous flying debris and sparks, and the adjustable tool rests make it easy to securely position whatever you’re sharpening. With its extremely durable cast iron body, this small but mighty tool can handle heavy use.

They are most often used to cut through hardened and abrasive materials. Cobalt bits are able to cut through the most hardened metals, including bronze, cast iron, stainless steel and titanium. They are also able to cut through weld seams.

This sharpener handles pretty much any material, including carbide, black oxide and high-speed steel, and it can create split-point tips. It doesn’t offer the impressive angle ranges of the Drill Doctor 750X, but you can create the all-important 118- and 135-degree angles.

If you’re unsure of the equipment you need, then speak to us. At R.D. Barrett we’ve been supplying the public and the trade with high-quality tools since 1975. We’re always happy to answer any questions you might have, and give you the benefit of our experience to ensure you have the right tools to do the best job.

Over time, HSS drill bits can become blunt and need to be sharpened, which demands specialist tools that aren’t always available. If you’re using HSS drill bits for long periods or at high RPMs, you may need to use cutting fluid to keep the bit cool.

If you’re a DIYer beginner and you don’t need a high-end drill bit sharpener, consider the affordable Drill Doctor 350X. Despite the low price, it features a diamond wheel and is simple to use. This drill bit sharpener can only create 118-degree angles, though, so keep that in mind if you need to work with 135-degree bits.

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It’s crucial for the safety of your tools and yourself that you use the right bit for the job. You will find cobalt drill bits stocked alongside other popular choices, including titanium coated, titanium nitride and tungsten carbide bits. Each of these has its strengths and weaknesses which you should be aware of before buying.

High-quality drill bits aren’t cheap. And once they become dull, they’re ineffective and more likely to “walk” around and damage your workpiece.

R.D. Barrett was established in 1975 by Ron Derek Barrett, an ex employee of both DS & G Lathes and Ford Motor Company. We hold one of the UK largest stock of engineering tooling.

If you plan on sharpening bits with a bench grinder, this General Tools 825 Attachment, when securely mounted to your benchtop, can give you clean points and accurate angles.

If you do a lot of drilling, a drill bit sharpener a smart buy. It saves you time, because you won’t waste minutes struggling to drive a dull bit through your workpiece. And it saves you money, because you aren’t throwing out dull bits all the time.