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.
- High Quality Diamond Drill Bits: Comparison Table
- 7 Top Quality Diamond Drills
- Best Diamond Drill Bits
- How to Choose the Perfect Diamond Drill Bit – Buyer’s Guide
- Frequently Asked Questions about Best Diamond Drill Bits
- Which Is Best? – Our Final Verdict
High Quality Diamond Drill Bits: Comparison Table
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 Top Quality Diamond Drills
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.
Best Diamond Drill Bits
1. Blendx Diamond Drill Bits
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.
- Perfect for drilling glass and ceramic tiles
- Cuts with ease
- Highly durable
- Clear standard use guidelines and manual
- Tends to overheat unless you lubricate with water
2. THINKWORK Diamond Drill Bits
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 size can do various tasks. It’s also economical to buy the set as you reap value for money.
- Comes with a saw guide clamp and a screwdriver
- Economical to buy a set
- Strong and durable
- Cuts high precision and clean holes
- Good for cutting glass, marble, and other tough material
- The suction cup tool tends to rust
- Needs constant water lubrication to prevent overheating
3. Drillax Diamond Drill Bits ¼ To 2 Inches
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 combines with an electroplated diamond coating to ensure exemplary performance and 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.
- Comes with a clear user guide
- Strong and durable
- Longer hole saws for deeper drilling
- Faster and cleaner cuts
- The drill bits dull after overtime
4. PoraxyDiamond Drill Bits with Hole Saw Guide
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 size 15 pieces per set are functional and perfect for cutting glass, tile bottles, porcelain, et cetera. And a guide sets clear direction 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.
- Value for money
- Excellent quality
- Accurate and high precision
- Comes with a drill bit/hole saw user guide
- May not be used on concrete beyond ½”
5. Drillax Diamond Drill Bit 10 Pieces Set 5/32 To 1 Inch
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.
- Used with most drill machines
- Longevity in use
- Strong and high-quality drill bits
- Does not come with a storage case
- Tend to wear out after 3-5 hole cuts
6. Drillpro drill bit set
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.
- High quality and sharp cutting edge
- Produces smooth clean holes
- Unless you use a water lubricant, they may burn out
7. Neiko 00823A Diamond Grit Hole Saw Drill Bit
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 range from5/32to ½ inch. Apart from that, the nickel coating prevents corrosion, while the diamond coating makes the bits sharper and long-lasting.
- More durable than cobalt and carbide drill bits
- Value for money
- Perfect for high precision holes
- Good quality and performance
- They burn at the slightest warmth or heating
How to Choose the Perfect Diamond Drill Bit – 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 about Best Diamond Drill Bits
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 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.