7 Best Diamond Drill Bit Review (Popular Choices) 2024

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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 Picks

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.

Top Pick
BLENDX Diamond Drill Bits - Glass and Tile Hollow...
Runner Up
THINKWORK Diamond Drill Bits, Hollow Drill Hole...
Amazon's Choice
Drilax Diamond Hole Saw Diamond Drill Bits Set...
Best Rated
Hole Saw Set,15Pcs Diamond Drill Bits, Tile Hole...
Highest Drilling Rate
Drilax Diamond Drill Bit 10 Pieces Set 5/32 3/16...
Most Reviewed
Baban Diamond Drill Bits,10Pcs Hole Saw Diamond...
Product Name
Blendx Diamond Drill Bits
THINKWORK Diamond Drill Bits
Drillax Diamond Drill Bits ¼ To 2 Inches
PoraxyDiamond Drill Bits with Hole Saw Guide
DRILAX100425 Diamond Drill Bit Set
Baban Diamond Drill Bits 10Pcs Set
Material:
Ceramic, Glass, Porcelain, Ceramics, Diamond
Carbon Steel
Diamond Coated Steel
Carbon Steel
Steel with Nickel Coating
Stainless Steel
Compatible Material:
Fiberglass, Stone
Porcelain, Glass, Ceramic, Rubber, Marble
Engineered Wood, Porcelain, Wood, Glass, Ceramic, Marble
Porcelain, Glass, Ceramic, Marble
Ceramic, Porcelain Tile, Glass, Granite, Quartz, Slate, Kitchen, Bathroom, Shower, Lamps
Glass, tile bottles, blocks jars, fiberglass porcelain tile ceramic, slate Mable, granite light stone
Bits Size:
6mm, 8mm, 10mm, 14mm, 16mm, 18mm, 22mm, 35mm. 40mm, 50mm
6mm, 8mm, 10mm, 12mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm
1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 3/8, 1 1/2, 1 3/4, 2"
6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 50mm
5/32" in to 1 inch
6mm-32mm
Number of Bits:
10 bits
10 bits
10 bits
15 bits
10 Pieces
10Pcs
Prime Status
-
-
Top Pick
BLENDX Diamond Drill Bits - Glass and Tile Hollow...
Product Name
Blendx Diamond Drill Bits
Material:
Ceramic, Glass, Porcelain, Ceramics, Diamond
Compatible Material:
Fiberglass, Stone
Bits Size:
6mm, 8mm, 10mm, 14mm, 16mm, 18mm, 22mm, 35mm. 40mm, 50mm
Number of Bits:
10 bits
Prime Status
-
Price
Runner Up
THINKWORK Diamond Drill Bits, Hollow Drill Hole...
Product Name
THINKWORK Diamond Drill Bits
Material:
Carbon Steel
Compatible Material:
Porcelain, Glass, Ceramic, Rubber, Marble
Bits Size:
6mm, 8mm, 10mm, 12mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm
Number of Bits:
10 bits
Prime Status
Price
Amazon's Choice
Drilax Diamond Hole Saw Diamond Drill Bits Set...
Product Name
Drillax Diamond Drill Bits ¼ To 2 Inches
Material:
Diamond Coated Steel
Compatible Material:
Engineered Wood, Porcelain, Wood, Glass, Ceramic, Marble
Bits Size:
1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 3/8, 1 1/2, 1 3/4, 2"
Number of Bits:
10 bits
Prime Status
Price
Best Rated
Hole Saw Set,15Pcs Diamond Drill Bits, Tile Hole...
Product Name
PoraxyDiamond Drill Bits with Hole Saw Guide
Material:
Carbon Steel
Compatible Material:
Porcelain, Glass, Ceramic, Marble
Bits Size:
6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 50mm
Number of Bits:
15 bits
Prime Status
Price
Highest Drilling Rate
Drilax Diamond Drill Bit 10 Pieces Set 5/32 3/16...
Product Name
DRILAX100425 Diamond Drill Bit Set
Material:
Steel with Nickel Coating
Compatible Material:
Ceramic, Porcelain Tile, Glass, Granite, Quartz, Slate, Kitchen, Bathroom, Shower, Lamps
Bits Size:
5/32" in to 1 inch
Number of Bits:
10 Pieces
Prime Status
-
Price
Most Reviewed
Baban Diamond Drill Bits,10Pcs Hole Saw Diamond...
Product Name
Baban Diamond Drill Bits 10Pcs Set
Material:
Stainless Steel
Compatible Material:
Glass, tile bottles, blocks jars, fiberglass porcelain tile ceramic, slate Mable, granite light stone
Bits Size:
6mm-32mm
Number of Bits:
10Pcs
Prime Status
Price

 

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.

Blendx FBA_bx-022 Diamond Drill Bits
Features
  • Material: Ceramic, Glass, Porcelain, Ceramics, Diamond
  • Style: Hollow core drill bits
  • Compatible Material: Fiberglass, Stone
  • Bits Size: 6mm, 8mm, 10mm, 14mm, 16mm, 18mm, 22mm, 35mm. 40mm, 50mm
  • Number of Bits: 10 bits

 

TODAY’S DEAL on AMAZON

 

Blendx alloy steel Diamond Drill Bits 10Pcs 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.

Positive Feedback
  • Perfect for drilling glass and ceramic tiles
  • Cuts with ease
  • Highly durable design
  • Clear standard use guidelines and manual
Negative Feedback
  • Tends to overheat unless you lubricate with water

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.

THINKWORK 10-Piece Diamond Drill Bits
Features
  • Material: Carbon Steel
  • Compatible Material: Porcelain, Glass, Ceramic, Rubber, Marble
  • Bits Size: 6mm, 8mm, 10mm, 12mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm
  • Number of Bits: 10 bits

 

TODAY’S DEAL on AMAZON

 

THINKWORK Carbon Steel Diamond 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.

Positive Feedback
  • Comes with a saw guide clamp and a screwdriver
  • Economical to buy a set
  • Strong and durable
  • Cuts precise and clean holes
  • Good for cutting glass, marble, and other tough material
Negative Feedback
  • The suction cup tool tends to rust

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.

Drillax Hole Saw Diamond Drill Bits
Features
  • Material: Diamond Coated Steel
  • Bits Size: 1/4, 3/8, 1/2, 3/4, 1, 1 1/4, 1 3/8, 1 1/2, 1 3/4, 2″
  • Compatible Material: Engineered Wood, Porcelain, Wood, Glass, Ceramic, Marble
  • Number of Bits: 10 bits

 

TODAY’S DEAL on AMAZON

 

Drillax Alloy Steel Diamond Drill Bits Set 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.

Positive Feedback
  • Comes with a clear user guide
  • Strong and durable
  • Longer hole saws for deeper drilling
  • Faster and cleaner cuts
Negative Feedback
  • More expensive than others

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.

Poraxy Diamond Drill Bits 15Pcs
Features
  • Material: Carbon Steel
  • Compatible Material: Porcelain, Glass, Ceramic, Marble
  • Bits Size: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 50mm
  • Number of Bits: 15 bits

 

TODAY’S DEAL on AMAZON

 

Poraxy Carbon Steel Diamond Drill Bits 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.

Positive Feedback
  • Great value for your money
  • Excellent quality
  • Accurate and high precision
  • Comes with a drill bit/hole saw user guide
Negative Feedback
  • Not the best for thick, tougher materials 

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.

Drillax Diamond Drill Bit 10 Pieces Set
Features
  • Material: Steel with Nickel Coating
  • Bits Size: 5/32, 3/16, 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1 Inch
  • Compatible Material: Engineered Wood, Glass, Porcelain, Ceramic, Wood
  • Number of Bits: 10 bits

 

TODAY’S DEAL on AMAZON

 

Drillax Steel Diamond Drill Bits 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.

Positive Feedback
  • Used with most drill machines
  • Strong and high-quality drill bits
  • Useful for a variety of projects – including glass, ceramic and tile
Negative Feedback
  • Does not come with a storage case

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.

BABAN Moworve1165 Diamond Drill Bits
Features
  • Material: Stainless Steel
  • Compatible Material: Glass, tile bottles, blocks jars, fiberglass porcelain tile ceramic, slate Mable, granite light stone
  • Bits Size: 6mm,8mm,10mm,12mm, 14mm, 16mm, 18mm, 22mm, 26mm, 32mm
  • Number of Bits: 10 bits

 

TODAY’S DEAL on WALMART              TODAY’S DEAL on AMAZON

 

BABAN 10Pcs Diamond Drill Bits 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.

Positive Feedback
  • Affordable set
  • High quality and sharp cutting edge
  • Produces smooth clean holes
  • Durable design
Negative Feedback
  • Require a water lubricant

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.

Neiko Diamond Hole Saw Drill Bit
Features
  • Material: Marble, Glass, Porcelain, Ceramics, Diamond
  • Compatible Material: Glass, fiberglass, tile, granite, marble, stone, and porcelain
  • Bits Size: 5/32-inch (4mm), ¼-inch (6mm), 5/16-inch (8mm), 3/8-inch (10mm) and 1/2-inch (12mm)
  • Number of Bits: 5 bits

 

TODAY’S DEAL on AMAZON

 

NEIKO 5Pcs Diamond Hole Saw Bits 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.

Positive Feedback
  • More durable than cobalt and carbide drill bits
  • Great value
  • Perfect for high precision holes
  • Good quality and performance
Negative Feedback
  • They burn at the slightest warmth or heating

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.

Cost

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.

Durability

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.

Final Thought

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.

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