Diamond drill bits are rare to find in ordinary workshops. Indeed, carbide and high-speed steel are no match for this hard material. Diamond bits make holes in tough materials like rocks, glass, and ceramic by grinding.
Now, the grinding process generates a lot of heat as the chips wash away through the side holes. As such, you need to use water lubricants to cool down and prevent damage to the bits or the material.
The standard safety rules for using drill bits include low speed, constant water lubrication, and low pressure during drilling. If you need some of the best diamond drill bits for your craft shop, check out our top suggestions for you.
|Top Pick:||BLENDX 10Pcs Diamond Drill Bits|
|Runner Up:||THINKWORK Diamond Drill Bits Set|
|Amazon's Choice:||DRILAX 10 Pcs Diamond Hole Saw Bits|
|Best Rated:||Poraxy 6 to 50mm Diamond Drill Bits|
|Highest Drilling Rate:||Drilax100425 Diamond Drill Bits|
|Most Reviewed:||BABAN 10Pcs Diamond Drill Bits Set|
Comparison of Top-Rated Diamond Drill Bits (2023)
In this section, we give an honest review about some of the best brands of diamond drill bits, their features, and price checklist. However, if you won’t stick to the end, we have a comparison table that summarizes it all. Have a look.
7 Best Diamond Drilling Bits Reviewed & Ranked (UPDATED)
Diamond drill bits may be sintered or electroplated. The sintered drill bits contain several layers of diamond in a medium that are stuck together through nickel. What’s good about them is that they are not easy to wear down, and sharpness keeps renewing through washing with aluminum oxide stone.
On the other hand, electroplated drill bits have a single layer of diamond and if worn out, you may have to buy ones. So, here are 7 top-quality diamond drill bits for you today.
1. BLENDX 6mm to 50mm Diamond Drill Bits – Top Pick
Blendx diamond drill bit is made of alloy steel with a diamond coating at the core tips. This is exactly what you need to cut holes into materials harder for carbide and without breaking your bits.
They come in 10 different size ranges of 6mm to 50mm for versatility. With an electric drill, they make clean holes with utmost accuracy on glass, ceramic tiles, porcelain, and tough granite stones.
However, to improve the lifespan of these drill bits, maintain low drill speeds, low pressure, and water lubrication. We appreciate that these bits are high-performing, very affordable, and have a longer lifespan than other drill bits.
Users shared that this set performs well for projects around the home. Like most diamond bits, but sure to keep them lubricated to avoid overheating. Multiple buyers commented on the durability of this set, making these a great addition to your bit collections.
2. THINKWORK 10-Piece Diamond Drill Bits Set – Runner Up
These drill bits are made of industrial-gauge carbon steel with a nickel-plated diamond coating to withstand corrosion and wear. The thick diamond coating ensures high precision and clean cutting. Furthermore, it is long-lasting compared to carbide and cobalt-coated drill bits.
On the other hand, the hollow core with the large clearance holes ensures that water swipes in to cool and clear chips to avoid clogging the drill bits. Besides, it also improves efficiency and ensures longevity.
Lastly, we appreciate that a single set with 10 pieces of varying sizes can do various tasks. It’s also economical to buy the set as you reap value for money.
DIYers are pleased with their purchase of this set. It does seem like these are best for projects around the house versus professional projects. “I was fully satisfied. It performed perfectly to what I intended to use it.”
3. DRILAX Diamond Hole Saw Drill Bit 10 Pcs – Amazon’s Choice
If you are looking for premium quality and durability, Drillax diamond drill bits are what you need. They are made of strong steel with a nickel coating and combined with an electroplated diamond coating to ensure exemplary performance and a longer lifespan.
With a 3/8 shank size, you can use the bits with most drill machines. On the other hand, you’ll appreciate the strong zipper carrying case for ease of portability and storage.
What’s more, buying a set of these bits is one step towards flexible applications and the various sizes can run multiple craft projects. They also come with a user guide for glass, ceramic, granite, and marble to ensure that you follow all the specified directions.
This set is an investment for sure, but if you regularly drill delicate materials such as glass and ceramic, these are worth the investment. Like most diamond bits, users recommend that you keep these wet during use to avoid overheating. “Great diamond drill bits for the money.”
4. Poraxy 15Pcs Diamond Drill Bits – Best Rated
While the high-strength carbon steel makes these bits durable; an additional high-quality diamond coating improves the drilling speed and cutting uniformity.
Besides, the different sizes, 15 pieces per set are functional and perfect for cutting glass, tile bottles, porcelain, et cetera. And a guide sets clear directions on how to use the hole saw or drill bit on these materials.
Also, the hole saw jig fixture has a large suction base up to 3-1/4 inches and accommodates hole saws of any size. We like that the bits are sturdy, durable, and accurately positioned by the hole centering locator.
Users have seen great results using these drill bits. Multiple reviewers have owned this set for some time and they still perform well. As always when working with delicate materials, you’ll have the best results if you drill slowly with light pressure.
5. Drilax DRILAX100425 Diamond Drill Bits – Highest Drilling Rate
This is the medium-size option for standard electric, rotary tools, and battery drillers. The sizes range between 5/32 to 1-inch and with a shank size of 3/8 which makes it versatile.
With this set, you get to save 50% of what you’d buy with the big size but, the services are all the same. Steel combined with nickel coating makes these drill bits sturdy and durable. But the diamond coating reinforces its cutting strength and lifespan.
Also worth noting is that you don’t have to use a center pilot drill with these bits. Instead, you can make your plywood guide, or start drilling at a tilted angle before getting it back to a vertical position. You also don’t forget to keep the drill bit wet at all times.
All in all, this is an economy pack if you have to shop on a budget.
Users successfully used these bits for a variety of delicate materials, so they would be a great choice for your project. Customers are happy with the quality of this affordable set, with several commenting on its reliable durability over time.
6. BABAN Moworve1165 10Pcs Diamond Drill Bits – Most Reviewed
These bits are what you need for cutting glass, marble, and ceramic at 6mm to 30mm diameter. They are made of stainless steel with nickel alloy and the core tips are diamond-coated. These two features make them durable, high-performing, and accurate at boring holes.
We like that the drill bits can make a clean circle cut from glass, tiles, and marble as a result of the sharp cutting edge.
The different size drill bits are excellent for most DIY applications like raising wall TV mounts and making kitchen and bathroom countersinks.
At a low cost, you can get these drill bits for your DIY projects.
This set works great on delicate materials such as ceramic and glass – “Really easy to use. Works fast on ceramic pots.” They are a great value, getting 10 bits in the set, including multiple sizes for all of your projects.
7. NEIKO 00823A 5Pcs Diamond Hole Saw
With this 5 piece-drill bit set, your DIY procedures involving glass, ceramic, or marble are easy and fast. These bits are sharper than any carbide core tips and are more durable.
While the side holes allow for the flow of water for cooling, they also allow the removal of clogging material for a smooth operation.
You’ll also appreciate the various sizes ranging from5/32 to ½ inches. Apart from that, the nickel coating prevents corrosion, while the diamond coating makes the bits sharper and long-lasting.
Buyers shared their satisfaction with this bit set. These have been used successfully for delicate materials such as ceramic and glass. There was some mention of these cracking materials, but using gentle pressure that is required for such projects, you shouldn’t have any issues.
How to Choose – Buyer’s Guide
You don’t need magic to choose the right product. You may have to arm yourself with correct product information to make the right purchasing decision. So, what should you consider before investing your money in high-quality diamond drill bits? Let’s dive in.
Diamond drill bits are more expensive compared to cobalt and carbide. However, depending on whether the diamond bits are multi-layered (sintered) or single-layered, their costs tend to vary.
The more expensive your diamond drill bits, the better in terms of quality, durability, and sheerness.
Type of material
Diamond bits are tailored to cut holes in tough materials like glass, ceramic, and porcelain. If you use on soft material, it may clog the cores and cause malfunction. The same applies to concrete; it is not advisable to use them on concrete as they may burn out.
Stainless steel combined with nickel alloy is sturdy. However, when electroplated with diamond coating it improves the sharpness, lifespan, and overall strength.
Industrial quality carbon steel is also a perfect choice when electroplated with a diamond coating. However, sintered burrs and drill bits are more durable than their electroplated counterparts.
Frequently Asked Questions
In this section, we respond to some common questions about top-quality diamond drill bits. Let’s dive in.
Q: How long does a diamond drill bit last
A: sintered diamond drill bits last longer than electroplated diamond bits. It’s not easy to estimate a lifespan, but if you have to work with a multi-layered diamond bit, you’re assured of the best service for the longest time. The shortest lifespan is about 120 holes.
Q: What is the best quality drill bits?
A: There are many drill bits out there but we find that the Craftsman 9-64085 Professional Cobalt Drill Set is the best. It’s quite well-made and has impeccable cutting precision.
Other top-quality choices are the IRWIN Drill Bit Set (80181) and Blendx Diamond Drill Bits.
Q: Why is diamond used for tips of drills?
A: Diamond cuts by grinding. So, at tips, low pressure is applied and it’s easier to control their temperature by water lubrication. Otherwise at the lowest speed, diamond cuts at a high rate with utmost accuracy compared to other drill bits.
Which One Is Best? – Our Final Verdict
Of all the diamond drill bits mentioned above, Blendx Diamond Drill Bits is our top pick. It has sharp cutting precision, high-quality, and durable than other ordinary drill bits. And best of all, they are inexpensive.
Diamond drill bits should be your top choice if you want long service, economical value, and most importantly, durability. If you choose the best diamond drill bits for the right material, you won’t have reasons to complain about the quality. otherwise, check out some of the best options from our list above.