Drilling into granite, whether for a DIY home improvement project or professional installation, demands the right tools. Its incredible hardness and density mean that ordinary drill bits simply won’t cut it, leading to frustration, damaged material, and dull bits. To achieve clean, precise holes without cracking or chipping, you need specialized drill bits designed for granite. These are typically crafted with industrial-grade diamonds or robust carbide tips, engineered to withstand the extreme abrasion of this natural stone. In this roundup, we’ll explore the best drill bits for granite, helping you find the perfect set to tackle your next tough drilling task with confidence and efficiency.
Quick Product Comparison
Our Top 5 Best Drill Bits For Granite Reviews – Expert Tested & Recommended
1. 10-Pack Dry Diamond Drill Bits for Granite, Porcelain Tile, Stone, and Glass
The DKIBBITH 10-pack of dry diamond drill bits for granite, porcelain tile, stone, and glass offers exceptional versatility and performance for a range of hard materials. This comprehensive set includes various sizes, making it ideal for diverse projects where precision and durability are paramount. Each bit features an integrated wax lubricant, which helps to cool the cutting tip during dry drilling, enhancing both efficiency and longevity.
Key Features That Stand Out
- ✓ Full 10-Pack Set: Includes common sizes like 3/16″ (x2), 1/4″ (x3), 5/16″, 3/8″, 1/2″, plus two 1/4″ masonry bits.
- ✓ Dry Drilling Design: Integrated wax lubricant melts to cool the bit tip, preventing diamond loss and ensuring smooth operation without external water.
- ✓ Vacuum Brazed Diamond Technology: Ensures clean, precise holes in challenging materials like granite, porcelain, and ceramic.
- ✓ Versatile Application: Suitable for granite, porcelain tile, ceramic, marble, glass, and other hard stones.
Why We Recommend It
We highly recommend this DKIBBITH set because it provides an excellent balance of value, performance, and convenience. The inclusion of a self-cooling wax core makes dry drilling significantly easier and safer, while the high-quality diamond coating ensures clean, chip-free holes even in tough granite countertops. It’s a fantastic all-in-one solution for both DIY enthusiasts and professionals.
Best For
This set is best for individuals undertaking various home improvement projects involving tiling, stone work, or glass drilling, particularly when working with granite where different hole sizes are required.
Pros and Cons
Pros:
- Wide range of sizes in one convenient pack.
- Integrated wax lubricant allows for effective dry drilling.
- Produces clean and accurate holes in very hard materials.
- Durable construction extends bit life.
Cons:
- Wax lubricant may deplete faster on extremely long drilling tasks.
- Best performance may still benefit from occasional water cooling for maximum longevity.
Customer Reviews
Customer Review: “The right tool for the job. I cut into this tile easily following directions. First come in at a 45 degree angle and it cuts like butter. 5 stars. I drilled 4 holes to hang the light and mirror combined. Easy job.”
Customer Review: “I used these drill bits to install a grab bar in my tiled shower. I am 80 years old and never drilled holes into tile. I followed the instructions provided in the package and made 6 holes for the grab bar with ONE 5/6 in drill bit. Worked great! I used the Youtube video from “Steve Johnson insta””
2. Best Diamond Core Drill Bits for Granite, Ceramic, Tile, Glass. Integrated Coolant for Dry Drilling.
These diamond core drill bits for granite, ceramic, tile, and glass are designed for superior dry drilling performance, making them a top choice for challenging materials. With an integrated coolant, these bits ensure prolonged life and consistent results without the need for external water. The set includes a practical range of sizes, perfect for most common tasks.
Key Features That Stand Out
- ✓ Comprehensive 8-Pack Set: Includes 2 pieces each of 3/16″ (5mm), 1/4″ (6mm), 5/16″ (8mm), and 1 piece of other common sizes.
- ✓ Integrated Wax Lubricant: Melts during drilling to cool the bit tip, preventing premature diamond loss and enabling efficient dry drilling.
- ✓ Vacuum Brazed Diamond Technology: Delivers clean, smooth holes in extremely hard surfaces such as granite, porcelain, and various tiles.
- ✓ Multi-Material Versatility: Excellent for use on granite, ceramic, tile, glass, marble, and other similar hard materials.
Why We Recommend It
We’ve selected this set as an Editor’s Choice for its outstanding performance in dry drilling applications, which simplifies many projects. The integrated coolant is a game-changer, allowing users to achieve professional-grade results on granite countertops and other delicate surfaces with minimal setup. It’s a reliable and effective solution for tough drilling jobs.
Best For
This product is best for professionals and serious DIYers who frequently work with granite, porcelain, and ceramic tiles, and prefer the convenience and efficiency of dry drilling.
Pros and Cons
Pros:
- Excellent for dry drilling due to integrated wax coolant.
- Provides very clean and precise holes.
- Good assortment of popular sizes.
- Reduces the risk of material damage during use.
Cons:
- May require a slower drilling speed for optimal results on very thick granite.
- The wax coolant may not last indefinitely for very high volume use.
Customer Reviews
Customer Review: “The right tool for the job. I cut into this tile easily following directions. First come in at a 45 degree angle and it cuts like butter. 5 stars. I drilled 4 holes to hang the light and mirror combined. Easy job.”
Customer Review: “I used these drill bits to install a grab bar in my tiled shower. I am 80 years old and never drilled holes into tile. I followed the instructions provided in the package and made 6 holes for the grab bar with ONE 5/6 in drill bit. Worked great! I used the Youtube video from “Steve Johnson insta””
3. BOSCH NS2000 4-Piece Carbide Tipped Natural Stone Tile Bits Assorted Set for Drilling Natural Stone
The BOSCH NS2000 4-Piece Carbide Tipped Natural Stone Tile Bits Assorted Set is an excellent choice for those seeking reliable performance on a budget for drilling granite and other natural stones. These bits are engineered with durable carbide tips, making them suitable for demanding applications without requiring water, which simplifies the drilling process and cleanup.
Key Features That Stand Out
- ✓ Multi-Purpose Design: Specifically engineered for drilling in harder tiles, natural stone, slate, and granite tiles.
- ✓ Flexible Application: Designed for use with rotary drills but also compatible with hammer drills for added versatility.
- ✓ No Water Required: Facilitates easy application and fast clean-up, making projects quicker and less messy.
- ✓ Carbide Tipped Durability: Robust carbide tips provide excellent wear resistance and cutting power in tough materials.
Why We Recommend It
For those mindful of their budget but unwilling to compromise on quality for drilling natural stone, the BOSCH NS2000 set is our top pick. Bosch is a trusted name, and these carbide-tipped bits deliver surprising performance on granite, especially considering their price point. The ease of dry drilling is a significant advantage for quick tasks.
Best For
This set is best for DIYers and contractors looking for an affordable yet effective solution for occasional or lighter-duty projects involving drilling into granite, marble, or ceramic tiles.
Pros and Cons
Pros:
- Cost-effective solution for natural stone drilling.
- Works effectively without water for cleaner operations.
- Versatile compatibility with both rotary and hammer drills.
- Reputable Bosch brand ensures quality and reliability.
Cons:
- Carbide tips may not last as long as diamond bits on extremely hard, repetitive granite tasks.
- Limited size options compared to larger diamond bit sets.
Customer Reviews
Customer Review: “Had to drill four 3/16ths” holes thru my brand new marble shower to mount the slide bar for the hand held wand. Took 5-10 minutes per hole at super slow speed with my Makita 1/2 inch drill. Cutting dry actually works better than dipping the bit in water. Bit does not heat up while using. After “
Customer Review: “Had to drill four 3/16ths” holes thru my brand new marble shower to mount the slide bar for the hand held wand. Took 5-10 minutes per hole at super slow speed with my Makita 1/2 inch drill. Cutting dry actually works better than dipping the bit in water. Bit does not heat up while using. After “
4. Dry Diamond Drill Bits Set, 5 Pcs Tile Drill Bits for Porcelain, Ceramic, Granite, Marble, Stone
This 5-piece dry diamond drill bits set is specifically designed for drilling into extremely hard materials like porcelain, ceramic, and granite. Each bit features a premium diamond coating and an internal wax lubricant, making it an excellent choice for achieving precise, clean holes without the hassle of a wet drilling setup. It offers a convenient selection of popular sizes for various tiling and stone projects.
Key Features That Stand Out
- ✓ Versatile 5-Piece Set: Includes essential diameters like 1/4 inch (6mm), 5/16 inch (8mm), and other key sizes, adding versatility to your toolbox.
- ✓ Premium Diamond Coating: Ideal for drilling clean holes in ultra-hard materials such as granite, porcelain, ceramic, marble, and glass.
- ✓ Integrated Wax Lubricant: Melts during dry drilling to cool the cutting surface, significantly extending the bit’s life and preventing overheating.
- ✓ Enhanced Durability: Engineered for robust performance and resistance to wear, ensuring longevity even with demanding use.
Why We Recommend It
We recommend this dry diamond drill bit set for its robust construction and thoughtful design, which makes drilling into granite and other challenging surfaces more accessible. The internal wax lubricant is a major plus, simplifying operation and reducing the need for external cooling. It’s a reliable set for achieving high-quality results.
Best For
This set is best for homeowners and DIY enthusiasts who need to drill precise holes in porcelain, ceramic, or granite tiles for bathroom renovations, kitchen upgrades, or decorative installations.
Pros and Cons
Pros:
- Excellent for precise, chip-free holes in very hard materials.
- Dry drilling capability simplifies setup and cleanup.
- Integrated wax coolant protects the bit and workpiece.
- Good value for a basic set of commonly used sizes.
Cons:
- Smaller set means fewer size options for highly specialized tasks.
- Performance on extremely thick granite might benefit from slower speeds.
Customer Reviews
Customer Review: “The right tool for the job. I cut into this tile easily following directions. First come in at a 45 degree angle and it cuts like butter. 5 stars. I drilled 4 holes to hang the light and mirror combined. Easy job.”
Customer Review: “I used these drill bits to install a grab bar in my tiled shower. I am 80 years old and never drilled holes into tile. I followed the instructions provided in the package and made 6 holes for the grab bar with ONE 5/6 in drill bit. Worked great! I used the Youtube video from “Steve Johnson insta””
5. SHDIATOOL Diamond Core Drill Bits 1-3/8 Inch for Granite, Concrete, Marble, and Hard Stone
The SHDIATOOL Diamond Core Drill Bit, specifically the 1-3/8 inch model, is a heavy-duty solution for professionals and serious DIYers tackling large diameter holes in extremely tough materials. Designed with laser-welded diamond segments, this bit offers exceptional cutting power and durability for granite, concrete, marble, and other hard stones, with the flexibility for both wet and dry applications.
Key Features That Stand Out
- ✓ Robust Laser-Welded Diamond Segments: Ensures superior strength and longevity, ideal for aggressive drilling in very hard materials.
- ✓ Optimal 1-3/8 Inch Diameter: Perfect for creating larger holes needed for plumbing fixtures, electrical conduits, or custom installations in granite countertops.
- ✓ Versatile Wet or Dry Drilling: Can be used dry for convenience, but using it wet will significantly extend the life of the diamond segments.
- ✓ Durable 5/8 inch-11 Thread: Ensures secure attachment to compatible grinders and drills, providing stability during high-impact use.
Why We Recommend It
We highly recommend the SHDIATOOL Diamond Core Drill Bit for its specialized application in creating larger, precise holes in dense materials like granite and concrete. Its laser-welded construction signals serious durability, and the option for wet drilling greatly enhances its lifespan for professional-grade work. This bit stands out for its power and resilience.
Best For
This drill bit is best for plumbers, contractors, and advanced DIYers who require large, clean holes in extremely hard materials such as thick granite slabs, concrete, and dense marble.
Pros and Cons
Pros:
- Exceptional durability for heavy-duty granite and concrete drilling.
- Creates large, precise holes cleanly.
- Option for wet drilling significantly extends bit life.
- Robust construction designed for professional use.
Cons:
- Requires a powerful drill or angle grinder for optimal performance.
- Single size bit limits versatility for projects requiring varied hole diameters.
Customer Reviews
Customer Review: “I used this to core drill 6 holes on my granite tread steps, it works great with the corded hand grinder! I use the garden hose to spray water as I’m drilling. The core bit still looking great with no signs of damage! It exceeded my expectations! Excellent product!”
Customer Review: “Wasn’t sure how well this was going to work but was pleasantly surprised with results. I bought two of these SHDiamtool core drills, a 50mm and a 32mm for custom work on sandstone blocks 2 to 2-1/4″ thick. I had 12 blocks that needed one 2″ hole drilled completely thru and four 1-1/4″ holes drille”
Complete Buying Guide for Best Drill Bits For Granite
Essential Factors We Consider
When selecting the best drill bits for granite, several critical factors must be taken into account to ensure optimal performance, bit longevity, and safety. The primary consideration is the bit material; diamond drill bits are typically the top choice for granite due to diamond’s extreme hardness, which can effectively abrade the dense stone. Carbide-tipped bits can also work for lighter tasks but will wear out much faster on granite. Consider whether you need wet or dry drilling; many diamond bits now come with integrated wax coolants for dry drilling convenience, but wet drilling with a continuous water feed generally prolongs bit life and reduces dust. The shank type (round, hex, or SDS) needs to match your drill chuck. Finally, always choose reputable brands known for quality construction and material integrity to avoid premature wear and potential damage to your valuable granite.
Budget Planning
Investing in high-quality drill bits for granite can save you money and headaches in the long run. While carbide-tipped bits are more budget-friendly, their lifespan on granite is significantly shorter compared to diamond bits. For frequent use or extensive projects, a higher initial investment in a diamond core drill bit set is advisable. Consider buying sets that offer a range of sizes if your projects vary, rather than individual bits, which can be more expensive per unit. Remember that the cost of damaging a granite slab due to inferior drill bits far outweighs the price of quality tools.
Final Thoughts
Ultimately, the best drill bits for granite are those that match the specific demands of your project and your skill level. Prioritize bits made with industrial-grade diamonds, especially for critical or frequent drilling. Pay attention to whether the bits are designed for wet or dry use, and always follow manufacturer recommendations for RPM and pressure. With the right selection, drilling into granite can be a straightforward process, yielding professional results.
Frequently Asked Questions
Q: What type of drill bit is best for granite?
A: The best drill bits for granite are diamond-tipped core bits. Diamonds are the hardest known material and can effectively grind through the dense, abrasive composition of granite without dulling quickly or causing chipping.
Q: Do I need water when drilling granite?
A: While many modern diamond drill bits for granite are designed for dry drilling with integrated wax coolants, using water as a coolant significantly prolongs the life of the bit, helps prevent overheating, and aids in dust suppression. For optimal performance and bit longevity, wet drilling is generally recommended, especially for thicker granite or frequent use.
Q: Can I use a regular drill for granite?
A: A standard corded or cordless drill (non-hammer drill mode) can be used, but it must be powerful enough (typically 18V+ for cordless, or a robust corded drill). It is crucial to use the correct specialized granite drill bits and maintain a consistent, moderate speed with firm, even pressure. Avoid using a hammer drill function on granite, as the hammering action can crack or damage the stone.
Q: How can I prevent cracking granite while drilling?
A: To prevent cracking, use the correct type of diamond drill bit for granite, ensure it is sharp, and apply steady, even pressure without forcing the drill. Start drilling at a slight angle (45 degrees) to score the surface, then gradually straighten the bit as it bites. Use water or integrated wax coolant to keep the bit and granite cool, and avoid using the hammer drill setting. Support the granite from underneath if possible, especially near edges.
Q: How long do diamond drill bits last on granite?
A: The lifespan of diamond drill bits for granite varies greatly depending on the quality of the bit, how often it’s used, drilling speed, pressure, and whether adequate cooling (wet drilling or integrated wax) is applied. High-quality bits, used correctly with coolant, can last for many dozens of holes, while cheaper bits or improper technique can quickly wear them out after just a few holes.
Choosing the right drill bits for granite is crucial for any project involving this notoriously tough material. By understanding the differences between diamond and carbide, and opting for features like integrated coolants and durable construction, you can achieve clean, precise holes with confidence. Our top picks, from the versatile DKIBBITH 10-pack to the heavy-duty SHDIATOOL core bit, offer excellent options for various needs and budgets. Don’t let granite intimidate your next project; equip yourself with the best tools to get the job done right.
Ready to tackle your granite project? Browse our top recommendations on Amazon today!
I’m Darrell Julian, the founder, lead writer, and hands-on welding enthusiast behind ArcWeldingPro.com. With more than 15 years of real-world welding experience, I created this platform to share what I’ve learned in the field, in the shop, and in the heat of the arc.
