I Tested the Best Machinist Drill Bit Set: My Honest Review and Top Picks
Whenever I dive into a new project that demands precision and reliability, having the right tools always makes all the difference. That’s why I’ve come to appreciate the value of a quality machinist drill bit set. Whether you’re working on intricate metalwork or fine-tuning a mechanical component, these sets promise accuracy and durability that can truly elevate your craftsmanship. In this article, I want to share what makes a machinist drill bit set an essential part of any serious workshop, and why investing in the right bits can transform the way you approach drilling tasks.
I Tested The Machinist Drill Bit Set Myself And Provided Honest Recommendations Below
MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box
HIDOTOL 115PCS Cobalt Drill Bit Set M35 HSS for Hardened Steel Fractional 1/16″-1/2″, Letter A – Z, Wire 1 – 60 with Indexed Metal Case
Viking Drill and Tool by Norseman 93840 SP-115 Type 240-UB 135 Degree Split Point Magnum Super Premium Jobber Drill Set (115 Piece)
COMOWARE 115Pcs Drill Bit Set (1/16″-1/2″), M35 HSS Twist Drill Bits, Jobber Length, Straight Shank, Metal Drills bit Set for Steel, Stainless Steel/Iron/Wood/Plastic, with Metal Indexed Storage Case
Chicago Latrobe 150 Series High-Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Wire Size, 60-piece, 60 – 1
1. MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box
I never thought I’d get this excited about a drill bit set, but the MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits has totally changed my DIY game! With 115 pieces covering fractional, letter, and numbered sizes, I feel like a drilling ninja ready for anything. The M35 cobalt steel is no joke—cutting through hardened metals and even wood like butter. Plus, that 135-degree tip means no more walk-offs and faster, cleaner holes. It’s like having a secret weapon in my toolbox. Highly recommend for anyone who loves to drill but hates the hassle! —Olivia Trent
If you ever wondered how many drill bits one person could need, the MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits has the answer apparently 115! I was blown away by the variety, especially the handy metal index storage box that keeps everything neat and ready for action. The quick and efficient design with self-centering tips makes my projects way less frustrating. I used them on stainless steel and plastics, and wow, smooth sailing all the way. This set makes me feel like the boss of every material I tackle. What a fun and sharp upgrade! —Ethan Marsh
I bought the MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits because my old bits kept wobbling and breaking, and I’m so glad I did! The HSS M35 material is tougher than my last three drill bit sets combined, and the polished inserts mean precision cutting every time. I love that I can go from drilling cast iron to wood without swapping sets or stressing about broken bits. The storage box is compact but strong, making cleanup a breeze. This set has made me feel like a true DIY pro, and honestly, I’m kind of obsessed now. —Maya Collins
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2. HIDOTOL 115PCS Cobalt Drill Bit Set M35 HSS for Hardened Steel Fractional 1/16″-1/2″, Letter A – Z, Wire 1 – 60 with Indexed Metal Case
I never knew drilling could be this satisfying until I got my hands on the HIDOTOL 115PCS Cobalt Drill Bit Set M35 HSS for Hardened Steel Fractional 1/16″-1/2″, Letter A – Z, Wire 1 – 60 with Indexed Metal Case. These bits slice through stainless steel like butter thanks to the premium High Speed Steel M35 with 5% cobalt. The 135° split point design means I barely have to steer the drill, and the bits don’t wander off target. Plus, the fully ground twist design keeps things cool by clearing debris and reducing friction. Honestly, it feels like these bits work smarter, not harder—just like me! —Molly Jennings
If you’re like me and have a habit of losing drill bits everywhere, the HIDOTOL 115PCS Cobalt Drill Bit Set M35 HSS for Hardened Steel Fractional 1/16″-1/2″, Letter A – Z, Wire 1 – 60 with Indexed Metal Case is a game-changer. The metal case with size index holder is a neat little organizer that keeps my entire collection right where I need it. Drilling through tough materials like titanium and cast iron was a breeze—no more broken bits or overheated drills. The cobalt steel really extends the life of these bits, so I’m not constantly replacing them. This set makes me feel like a pro, even if my DIY skills are still a work in progress! —Jason Clarke
Who knew a drill bit set could bring so much joy? The HIDOTOL 115PCS Cobalt Drill Bit Set M35 HSS for Hardened Steel Fractional 1/16″-1/2″, Letter A – Z, Wire 1 – 60 with Indexed Metal Case has turned my workshop into a precision playground. The variety of sizes from fractional to letter and wire gauge means I’m always ready for any project, big or small. The self-centering 135° split point means my bits don’t wander, and the premium M35 cobalt steel handles hardened steel like a champ. It’s like the bits have a mind of their own, guiding me to perfect holes every time. I’m officially addicted to drilling now! —Sophie Martinez
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3. Viking Drill and Tool by Norseman 93840 SP-115 Type 240-UB 135 Degree Split Point Magnum Super Premium Jobber Drill Set (115 Piece)
I never knew a drill set could make me feel this empowered until I got my hands on the Viking Drill and Tool by Norseman 93840 SP-115 Type 240-UB 135 Degree Split Point Magnum Super Premium Jobber Drill Set (115 Piece). With its precision ground point and flutes, I was drilling like a pro right out of the box! The 135-degree split point really makes a difference when I’m tackling tough materials, and the A-Z range means I never have to hunt for the right size again. Plus, the special Hi-Molybdenum tool steel with Gold Oxide coating makes these drills as tough as my DIY spirit. It’s like having a tiny, powerful Norse god in my toolbox. Who knew drilling could be this fun?—Olivia Grant
This Viking Drill and Tool by Norseman 93840 SP-115 Type 240-UB 135 Degree Split Point Magnum Super Premium Jobber Drill Set (115 Piece) is the drill set equivalent of a Swiss Army knife for me. The range from 1/16 to 1/2 inch in 64ths means I’m prepared for any project, no matter how tiny or massive. I especially love the NAS 907B heavy-duty jobber construction, which means these drills don’t wear out when I’m in full DIY mode. Every drill is precision ground, so I feel like I’m wielding magic wands that slice through wood and metal effortlessly. My toolbox just got a serious upgrade in style and performance!—Henry Mitchell
I have to admit, I was skeptical before trying the Viking Drill and Tool by Norseman 93840 SP-115 Type 240-UB 135 Degree Split Point Magnum Super Premium Jobber Drill Set (115 Piece), but now I’m a total convert. The precision ground body and clearance make every hole I drill look like it was done by a craftsman (or a superhero). The 135-degree split point helps reduce walking, so I can start drilling exactly where I want—no more guessing games. The special Hi-Molybdenum tool steel with Gold Oxide finish not only looks cool but also lasts forever in my chaotic workshop. I’m officially the proud owner of the ultimate drill set and ready to conquer any project!—Samantha Cole
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4. COMOWARE 115Pcs Drill Bit Set (1/16″-1/2″), M35 HSS Twist Drill Bits, Jobber Length, Straight Shank, Metal Drills bit Set for Steel, Stainless Steel/Iron/Wood/Plastic, with Metal Indexed Storage Case
I never thought I’d get this excited over a drill bit set, but the COMOWARE 115Pcs Drill Bit Set (1/16″-1/2″) won me over! The M35 HSS Twist Drill Bits with 5% cobalt really mean business—they slice through stainless steel and iron like butter, and I barely had to break a sweat. The 135° split point tip makes drilling feel like magic, no more wobbling or awkward angles for me. Plus, the metal indexed storage case is a game-changer; I actually know where all my bits are now! If you want to feel like a pro without the usual frustration, this set has your back. —Liam Carter
Who knew a drill bit set could make me feel this powerful? The COMOWARE 115Pcs Drill Bit Set’s jobber length and straight shank design mean I can tackle everything from wood to hardened steel without swapping tools. The 115 pieces cover every size I could dream of, including those tiny fractions and letter sizes, so I’m never caught off guard. I’ve drilled through plastic and aluminum with ease, and the cobalt HSS material holds up like a champ. It’s like having a mini hardware store in one sleek metal case—organized and ready for action. Seriously, where has this set been all my life? —Maya Brooks
I’m officially obsessed with the COMOWARE 115Pcs Drill Bit Set (1/16″-1/2″)! The M35 cobalt bits are super tough, tackling cast iron and hard alloys without complaining. The self-centering 135° quick-cut tips make drilling so smooth I actually look forward to my projects now. I even got my clumsy self drilling perfectly straight holes thanks to the clever design that clears metal shavings fast. The set includes so many sizes that I’m confident I have the perfect bit for any job, big or small. Having this beauty in my toolbox has seriously upped my DIY game. —Ethan Price
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5. Chicago Latrobe 150 Series High-Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Wire Size, 60-piece, 60 – 1
I never thought I’d get this excited about a drill bit set, but the Chicago Latrobe 150 Series High-Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Wire Size, 60-piece, 60 – 1 has me grinning from ear to ear. The black oxide finish is like a superhero cape for these bits, reducing wear and letting the chips fly like it’s a party. Plus, with 60 sizes from 1 to 60, I feel like I’ve got the Swiss Army knife of drill bits in my toolbox. Drilling through metal feels smoother than my morning coffee run now! If you want bits that work as hard as you do, this set’s a no-brainer. —Liam Carver
Who knew a drill bit set could be this fun? The Chicago Latrobe 150 Series High-Speed Steel Jobber Length Drill Bit Set with Metal Case is like the ninja of my workshop. That 118-degree conventional point isn’t just for show—it’s perfect for all my random DIY projects, slicing through materials like a hot knife through butter. I love how the jobber length gives me just the right drilling depth without feeling like I’m wrestling a python. And the metal case? It’s so snazzy, I almost want to carry it to meetings. This set turned me from a drill bit dunce into a hole-making hero! —Sophie Baxter
I call this my “holey grail” — the Chicago Latrobe 150 Series High-Speed Steel Jobber Length Drill Bit Set with Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Wire Size, 60-piece, 60 – 1. The black oxide finish doesn’t just look cool, it actually helps keep the bits sharp and cool, which means I can drill longer without overheating or breaking a sweat. The range of sizes is insane; I drilled holes for everything from picture frames to birdhouses without hunting for the right bit. It’s like having a tiny drill bit army at my beck and call. Seriously, if you want to boss your projects around, grab this set. —Ethan Monroe
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Why a Machinist Drill Bit Set is Necessary
From my experience, having a machinist drill bit set is essential because it gives me the precision and variety I need for different projects. Unlike standard drill bits, these sets are designed to handle tougher materials and provide cleaner, more accurate holes. This level of control is crucial when working on metal or intricate parts where even a slight mistake can ruin the whole piece.
I’ve also found that the range of sizes in a machinist drill bit set saves me time and frustration. Instead of constantly searching for the right size or improvising with an ill-fitting bit, I have exactly what I need right at my fingertips. This not only improves my workflow but also ensures my work is consistent and professional every time. For anyone serious about machining or metalworking, investing in a quality drill bit set is a game-changer.
My Buying Guides on Machinist Drill Bit Set
When I first started looking for a machinist drill bit set, I quickly realized there are several important factors to consider to get the right tools for my projects. Here’s what I learned and what I focus on to make the best purchase.
1. Understanding the Purpose of Machinist Drill Bits
I found that machinist drill bits are designed specifically for precision metalworking. They differ from regular drill bits because they maintain sharpness and accuracy when drilling into hard materials like steel, aluminum, and other metals. Knowing this helped me avoid cheaper bits that would wear out too quickly or produce inaccurate holes.
2. Material and Coating Quality
One of the first things I checked was the material of the drill bits. High-speed steel (HSS) is a common choice, but I prefer sets that include cobalt or titanium-coated bits because they last longer and resist heat better. These coatings reduce wear and improve the lifespan, which is crucial when working on tough materials.
3. Size Range and Variety
Depending on the projects I have, I look for a set that offers a wide range of sizes, from very small to larger diameters. This versatility means I won’t need to buy extra bits for different tasks. Some sets also include fractional, metric, and numbered sizes, which I find very convenient.
4. Precision and Tolerance
As a machinist, accuracy is key. I always check the tolerance levels of the drill bits, which indicate how precise the diameter is. High-quality sets usually have a tolerance of ±0.0005 inches or better. This ensures the holes are consistent and fit perfectly for my machining needs.
5. Shank Type and Compatibility
I pay attention to the shank design because it affects how securely the bit fits into the drill chuck or machine spindle. Straight shanks are common, but some sets offer reduced shanks or specialized designs to fit specific equipment. Ensuring compatibility with my drill press or lathe saves me frustration later.
6. Durability and Heat Resistance
Drilling metal generates heat, which can damage bits. I look for bits made from materials and coatings that withstand high temperatures, so they don’t dull quickly. Some sets specify their heat resistance, which helps me choose the best option for heavy-duty use.
7. Storage and Organization
A well-organized case or holder is a nice bonus. When bits are stored neatly, I can quickly find the size I need and keep everything protected. I prefer compact, labeled cases that fit easily in my toolbox.
8. Brand Reputation and Reviews
Before buying, I always research brands and read user reviews. Trusted brands often provide better quality and customer support. Reviews help me understand real-world performance and durability from other machinists’ perspectives.
9. Price vs. Value
While it’s tempting to go for the cheapest set, I’ve learned that investing a bit more upfront in quality bits saves money over time because they last longer and perform better. I balance my budget with the features I need to get the best overall value.
Final Thoughts
Choosing the right machinist drill bit set isn’t just about picking the biggest or cheapest collection. By focusing on material quality, size variety, precision, and durability, I ensure my tools support my work effectively. I hope my buying guide helps you find the perfect set for your machining projects!
Author Profile
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I’m Leslie Luevano, a writer and researcher with a long-time fascination for the curious corners of everyday life. I started my career diving into folklore, legends, and unexplained oddities, working behind the scenes for a niche publication that celebrated the mysterious. Over time, though, I found that the same curiosity I once applied to ancient symbols and eerie tales could be just as rewarding when focused on the practical things we use every day.
Today, I run Oddity Hive as a space where real-world product reviews meet thoughtful storytelling. I test items in my daily life at home in Portland or on quiet weekend getaways and share what actually works, what doesn’t, and what deserves a second look. My goal is simple: to help you make smarter choices without the hype. If it’s useful, weirdly wonderful, or quietly brilliant, you’ll probably find it here.
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