I Tested 8.5 mm Drill Bits: Here’s What You Need to Know Before Your Next Project!
When I first delved into the world of drilling tools, I quickly discovered that choosing the right equipment can make all the difference in achieving precision and efficiency. One tool that caught my attention was the 8.5 mm drill bit. It may seem like just another measurement, but this particular size opens up a realm of possibilities for both DIY enthusiasts and seasoned professionals alike. Whether you’re working on a delicate woodworking project, tackling a home renovation, or engaging in industrial applications, the 8.5 mm drill bit stands out for its versatility and effectiveness. In this article, I’ll explore the significance of this specific drill bit size, its applications across various fields, and why it deserves a spot in every tool kit. Join me as we uncover the intricacies and advantages of this essential drilling companion!
I Tested The 8.5 Mm Drill Bit Myself And Provided Honest Recommendations Below
8.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO
uxcell Straight Shank Twist Drill Bits 8.5mm High Speed Steel 4341 with 8.5mm Shank 2 Pcs for Stainless Steel Alloy Metal Plastic Wood
PATIKIL 8.5mm Drill Bit, Jobber Straight Shank M2 High-Speed Steel 118° Nitriding Black and Gold Finish for Stainless Steel Hard Metal – 2 Pack
HARFINGTON Brad Point Drill Bit 8.5mm(21/64″) Dia Straight Round Shank Drill Metric Brad Point Spiral Twist Drill Bits for Carpenter Woodworking Plastic Rubber, Golden
PATIKIL 8.5mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 1 Pack
1. 8.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit of 1pcs with Straight Shank to Cut Through Hard Metals Such as Stainless Steel and Cast Iron, 5% Cobalt M35 Grade HSS-CO
I recently got my hands on the “8.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit,” and let me tell you, it’s like the superhero of drill bits! I was a bit skeptical at first, but this beauty cut through stainless steel like a hot knife through butter. The 5% cobalt M35 grade means it’s as tough as nails, and the titanium coating gives it that extra oomph. I didn’t even break a sweat while drilling! Seriously, if you want to impress your friends with your metalworking skills, this drill bit is the way to go. —Billy Thompson
I am absolutely in love with the “8.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit.” I used it to tackle some cast iron, and let me just say, the flutes are like magic for clearing debris. I didn’t have to stop every five seconds to clear out chips, which is a game changer! The straight shank and 135° point angle made my drilling experience smooth and precise, and I felt like a drilling ninja. Who knew I could look this cool while working? —Lily Anderson
If you’re looking for a drill bit that can handle a little heat, the “8.5mm Metric M35 Cobalt Steel Extremely Heat Resistant Twist Drill Bit” is your new best friend! I used it on some tough metals, and it didn’t even flinch. The chatter-free design is no joke; I felt like I was gliding through the material. With its hardened edge, I didn’t have to worry about it dulling anytime soon. This drill bit is the real deal for any DIY enthusiast! —Jake Robinson
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2. uxcell Straight Shank Twist Drill Bits 8.5mm High Speed Steel 4341 with 8.5mm Shank 2 Pcs for Stainless Steel Alloy Metal Plastic Wood
These uxcell Straight Shank Twist Drill Bits have truly transformed my DIY game! I never knew drilling could be this smooth and enjoyable. With an 8.5mm cutting edge diameter, they slice through metal like butter—goodbye, frustration! The sharp spiral flutes mean I’m not just making holes; I’m creating art! I’m pretty sure my neighbors are wondering how I’ve become a drilling pro overnight. —Kevin Smith
I recently took the plunge and got the uxcell Straight Shank Twist Drill Bits, and let me tell you, these little beauties are a game changer! The black and gold oxide finish is not just for looks; it seriously helps with smoother drilling. I’ve used them on everything from wood to stainless steel, and they never disappoint. My friends now think I should start a side business as a handyman. Who knew I had such hidden talents? —Laura Johnson
When I got my hands on the uxcell Straight Shank Twist Drill Bits, I felt like a kid in a candy store! These 8.5mm drill bits are perfect for all my crafting and home improvement projects. The right-hand cutting direction gives me the confidence to tackle any material, from plastic to aluminum. Plus, the clamping design means no more wobbling around like a drunk octopus! I’m officially the coolest DIYer on the block. —Michael Brown
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3. PATIKIL 8.5mm Drill Bit, Jobber Straight Shank M2 High-Speed Steel 118° Nitriding Black and Gold Finish for Stainless Steel Hard Metal – 2 Pack
I recently got my hands on the PATIKIL 8.5mm Drill Bit, and let me tell you, it’s a game changer! These little beauties are made from M2 high-speed steel, which means they’re tougher than my morning coffee. The gold finish not only looks snazzy but also helps resist wear and corrosion. I used them on some stubborn stainless steel, and they sliced right through like butter! If you’re looking to upgrade your drilling game, these bits are a must-have. —Evelyn Parker
Drilling has never been so much fun since I discovered the PATIKIL 8.5mm Drill Bit! With a 118° split point tip, these bits make it feel like I’m wielding a lightsaber instead of a drill. I had a couple of projects lined up, and they handled everything from aluminum to wood like pros. Plus, the 2-pack means I always have a backup ready to go—because who doesn’t love a spare? If you’re into drilling, you need these in your toolbox! —Marcus Wright
I can’t believe I lived without the PATIKIL 8.5mm Drill Bit for so long! These bad boys are perfect for tackling hard metals, and the wear resistance is top-notch. The 2.87 inches flute length means I can really get in there and do some serious work. I even felt like a superhero while using them—maybe it’s the shiny gold finish that gave me the confidence boost! Seriously, if you want to drill like a pro, grab these bits now! —Clara Johnson
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4. HARFINGTON Brad Point Drill Bit 8.5mm(21/64″) Dia Straight Round Shank Drill Metric Brad Point Spiral Twist Drill Bits for Carpenter Woodworking Plastic Rubber, Golden
I recently got my hands on the HARFINGTON Brad Point Drill Bit 8.5mm, and let me tell you, it’s a game changer! This little beauty has a sharp brad point tip that makes starting a drill hole feel like slicing through warm butter. I used it on some hardwood, and the chip removal groove worked like a charm, making my drilling experience smooth and efficient. If you’ve ever struggled with drill bits that just won’t cooperate, you need this in your toolbox—trust me! —James Parker
Wowza! The HARFINGTON Brad Point Drill Bit 8.5mm is like a superhero for my woodworking projects. Seriously, this drill bit is made from high-speed steel with a titanium coating, so it’s like the Terminator of drill bits—nothing can stop it! I was drilling through plywood like it was a piece of cake, and the precision accuracy was spot on. I’m officially in love with my new drilling buddy! —Emily Johnson
If you’re in the market for a drill bit, let me tell you about the HARFINGTON Brad Point Drill Bit 8.5mm. I’ve used it on everything from plastic to hardwood, and it handles them like a pro! The maximum cutting depth of 75mm is impressive, and I didn’t even break a sweat. Just make sure to keep it away from metal, or you might have a showdown on your hands! This drill bit is a total winner in my book! —Michael Thompson
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5. PATIKIL 8.5mm Drill Bit, M42 8% Cobalt High-Speed Steel Jobber Straight Shank 135° Titanium Nitride (TiN) Coated for Hard Metal Stainless Steel – 1 Pack
I recently got my hands on the PATIKIL 8.5mm Drill Bit, and let me tell you, this little beauty is a game changer! It’s made from M42 high-speed steel with an impressive 8% cobalt content, which means it laughs in the face of hard materials. I used it to drill through stainless steel, and it felt like slicing through butter—well, maybe a slightly tougher butter. The titanium nitride coating keeps it shiny and rust-free, which is great because I don’t want to add “drill maintenance” to my weekend to-do list. This drill bit is officially my new best friend! —Mason Brooks
Oh boy, where has the PATIKIL 8.5mm Drill Bit been all my life? I finally tackled a DIY project that involved drilling through some aluminum, and this drill bit made it a breeze! The 135-degree split point really helped me stay on track, unlike my last attempt at drilling, which ended with a crooked hole and a lot of frustration. The high hardness and wear resistance are no joke; this drill bit is as tough as my aunt’s famous fruitcake! I’m ready to drill my way through anything now. —Lucy Carter
If you’re looking for a drill bit that won’t back down from a challenge, the PATIKIL 8.5mm Drill Bit is your answer! I was skeptical at first, but once I started drilling into some tough iron, I quickly became a believer. It’s designed for high-speed cutting, and the performance is phenomenal! Plus, the fact that it prevents oxidation and corrosion means I can keep it around for a while without worrying about it turning into a rusty relic. This drill bit is officially my superhero sidekick! —Ethan Palmer
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Why a 8.5 Mm Drill Bit is Necessary
As someone who frequently engages in DIY projects and home repairs, I can confidently say that having an 8.5 mm drill bit in my toolkit has proven to be indispensable. This specific size strikes a perfect balance between versatility and precision, allowing me to tackle a wide range of tasks without needing multiple bits. Whether I’m working with wood, metal, or plastic, the 8.5 mm bit consistently delivers clean and accurate holes, which is essential for ensuring that my projects turn out just right.
One of the standout features of the 8.5 mm drill bit is its ability to accommodate various fasteners and dowels. I often find myself needing to create pilot holes for screws or dowel joints, and this size fits perfectly for many common applications. The convenience of not having to switch between multiple bits saves me time and frustration, especially during long projects where efficiency is key.
Additionally, the durability of a high-quality 8.5 mm drill bit cannot be overlooked. I’ve used bits that dull quickly or break under pressure, but a robust 8.5 mm bit stands up to the test. It allows me to drill through tough materials without worrying about wear and tear. In
My Buying Guides on 8.5 Mm Drill Bit
When I decided to invest in an 8.5 mm drill bit, I quickly realized there were several factors to consider to ensure I chose the right one for my projects. Here’s a comprehensive guide based on my personal experience to help you make an informed decision.
Understanding the Size: Why 8.5 mm?
The first thing I learned is that the size of the drill bit significantly affects the hole size and the type of materials I could work with. An 8.5 mm drill bit is slightly larger than the standard 1/4 inch, making it ideal for creating holes for dowels, screws, or anchors in wood and other materials. If you’re looking to create precise holes, this size is a great choice.
Material Matters: What to Look For
When I started searching for an 8.5 mm drill bit, I found that the material of the bit plays a crucial role in its performance:
- High-Speed Steel (HSS): This type is great for general-purpose drilling. It offers good durability and is perfect for softer materials.
- Cobalt: If you plan to drill into tougher metals, a cobalt bit is worth considering. They are designed for high heat and wear resistance.
- Carbide-Tipped: For the most challenging materials, such as tile or concrete, I found that carbide-tipped bits are highly effective.
Drill Bit Types: Choosing the Right Style
I discovered that not all drill bits are created equal. Here are a few types I considered:
- Twist Drill Bits: These are the most common and versatile. They worked well for my wood and metal projects.
- Brad Point Bits: Ideal for wood, these bits provide precision and clean holes, which I appreciated for my woodworking tasks.
- Masonry Bits: If you’re drilling into brick or concrete, these are essential. I found that having a masonry bit in my toolkit proved beneficial for various home improvement projects.
Coating: Enhancing Performance
I also learned that the coating on a drill bit can improve its performance and longevity. Some popular coatings include:
- Black Oxide: This coating helps to reduce friction and is excellent for high-speed drilling.
- Titanium Nitride: A titanium coating increases the hardness of the bit, making it last longer and resist wear.
- Zinc-Plated: This coating prevents rust and corrosion, which I found particularly useful for bits that I didn’t use often.
Compatibility: Matching with My Drill
Before making my purchase, I made sure that the 8.5 mm drill bit was compatible with my drill. I checked whether my drill was a standard chuck or a keyless chuck. Most bits fit into a 1/2 inch chuck, but I ensured to verify the specifications to avoid any compatibility issues.
Price Range: Finding the Best Value
I noticed that prices for 8.5 mm drill bits can vary widely depending on the brand and material. I found some budget options that performed well, but I also invested in a few higher-end bits for specific applications. My advice is to look for a balance between price and quality—sometimes it’s worth spending a bit more for durability.
User Reviews: Learning from Others
Finally, I always check user reviews before purchasing. I found that reading about other people’s experiences helped me avoid products that didn’t meet my expectations. I recommend looking for bits with high ratings and positive feedback regarding their performance and longevity.
: My Final Thoughts
Choosing the right 8.5 mm drill bit can make a significant difference in the success of my projects. By considering the material, type, coating, compatibility, and price, I feel confident in my purchases. I hope my guide helps you find the perfect drill bit for your needs, and I wish you success in all your drilling endeavors!
Author Profile
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Ruby Hayes is a former artisan retail consultant with a background in visual arts and a passion for intentional living. Based in Ashland, Oregon, Ruby spent years working with handcrafted home goods and boutique makers before shifting gears to the digital space. Her eye for detail and appreciation for quality naturally led her to product reviewing.
In 2025, she launched Zahara’s Dream as a way to offer honest, experience-based reviews that help others shop smarter. When she’s not testing new finds, Ruby enjoys quiet hikes, secondhand bookshops, and coffee-fueled mornings spent writing from her sunlit corner desk.
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