If you’ve ever stood in a workshop staring at a hole saw, drill in one hand and a stack of wood, metal, or plastic in the other, you’ve probably wondered: How fast should I spin this thing? That question boils down to one of the most critical, yet often misunderstood, parts of using a hole saw: cutting speed. As a hole saw supplier who’s talked to hundreds of DIYers, carpenters, electricians, and metal fabricators over the last decade, I can tell you this isn’t just a “set it and forget it” number. Get it wrong, and you’ll deal with burnt materials, dull blades, broken pilots, or even scrap work that sets your project back hours. Let’s break down what cutting speed actually means, why it matters for hole saws specifically, and how to nail it for every material you work with. Hole Saw
First, let’s define the terms clearly, because when I mention “cutting speed,” I don’t mean the RPM (revolutions per minute) you punch into your drill. A lot of folks mix these two up, and that’s where the mistakes start. Cutting speed, often written as Vc in machining guides, is the surface speed of the hole saw’s outer edge, measured in feet per minute (FPM) or meters per minute (m/min). Think of it this way: if you could take a snapshot of the very tip of the hole saw’s tooth as it spins around, how fast is that tiny point moving along the material it’s cutting? That’s cutting speed. RPM, on the other hand, is how many full spins the hole saw makes per minute. These two numbers are related, but the size of your hole saw changes everything. A 1-inch diameter hole saw spinning at 100 RPM has a way different cutting speed than a 4-inch hole saw spinning at the same 100 RPM—because the outer edge of the bigger saw is moving a longer distance every spin. That’s why two hole saws running at the same RPM can have wildly different cutting speeds, and that’s why ignoring this is such a common error.
Now, why does this matter for hole saws more than other cutting tools? Hole saws have a larger contact area with the material than a twist drill bit or a jigsaw blade. The entire rim of the saw is cutting at once, which means heat builds up fast if you get the speed wrong. Too slow, and the teeth will rub instead of cut—generating friction, dulling them in half the time, and leaving a rough, charred edge on your hole. Too fast, and you’ll get “walking” of the pilot bit, burnt material, or even a tooth breaking off mid-cut, which is not only dangerous but can ruin expensive stock. I’ve seen a custom furniture maker ruin a $500 oak tabletop because they cranked the RPM too high on a 6-inch hole saw, melting the wood’s surface before they even realized what was happening. That’s the kind of avoidable mistake we talk about with customers every day.
Let’s get into the actual numbers, because that’s what most people need. The ideal cutting speed depends entirely on the material you’re cutting, and each material has a range of Vc that works best. I’ve refined these ranges over years of testing different hole saws and materials in our in-house testing lab, so these are practical, real-world numbers—not just textbook machining guides.
Let’s start with wood, the most common material for DIYers and carpenters. For softwood (pine, cedar, fir), the ideal cutting speed is between 150 and 250 FPM. For hardwood (oak, maple, walnut), that drops to 100 to 180 FPM. Wait, so hardwood needs a slower speed? Yes, because hardwood is denser, and faster speeds will generate too much friction, burning the grain and dulling carbide teeth if you’re using a high-quality hole saw. For PVC and other plastic materials, the range is even lower: 80 to 150 FPM. Plastics melt easily, so running too fast will leave a gummy, deformed hole, and can even cause the material to stick to the saw’s teeth.
Now for metal, which is where cutting speed gets extra critical, especially for professionals working with steel or aluminum. For mild steel (used in framing, pipe, or general metalwork), the ideal Vc is 60 to 100 FPM. For stainless steel, which is much tougher and generates more heat, that drops to 20 to 50 FPM. Aluminum, a softer, more conductive metal, can handle a faster speed: 150 to 300 FPM. I always remind our industrial customers that if they’re cutting thicker metal (over 1/4 inch), they should err on the lower end of that range—thicker material needs more time to cut, so faster RPM just wastes energy and overheats the teeth.
A lot of people ask: How do I convert that FPM number to RPM, so I know what to set my drill to? That’s the math part, and it’s simpler than it sounds. The formula for RPM is (cutting speed in FPM x 4) divided by the diameter of the hole saw in inches. Let me give you an example to make this concrete. If you’re cutting a 2-inch softwood hole, and your desired Vc is 200 FPM, your RPM is (200 x 4) / 2 = 400 RPM. If you’re cutting a 4-inch hardwood hole at 120 FPM, that’s (120 x 4) / 4 = 120 RPM. See how the bigger saw needs a much lower RPM to hit the same ideal cutting speed? That’s the key takeaway most people miss. They’ll just spin the drill at 400 RPM for a 4-inch hole, and suddenly their cutting speed is half of what it should be, leading to slow, rough cuts.
Now, let’s talk about variables that adjust these numbers, because the guidelines aren’t one-size-fits-all. First, the type of hole saw matters. Bi-metal hole saws (the standard for general metal and wood) handle a slightly higher cutting speed than carbide-tipped hole saws, which are designed for abrasive materials like cement board, tile, or fiberglass. Carbide-tipped saws can handle a bit more speed for hard materials, but they’re also more brittle—too fast, and the teeth will chip. For abrasive materials like masonry, diamond hole saws have their own Vc ranges, usually between 50 and 100 FPM for concrete, depending on the aggregate size.
Then there’s the depth of the cut. If you’re drilling a shallow hole (less than the depth of the hole saw), you can push the speed a bit higher than if you’re drilling a deep, full-depth hole. Deep cuts mean the saw is removing more material, generating more heat, and the chips have a harder time escaping—so slower speed is better to avoid overheating. That’s why when you’re drilling a 6-inch deep hole in a 6×6 post, you’ll want to drop your RPM 20-30% from what you’d use for a 1-inch deep hole.
Another variable is the type of drill you’re using. Corded drills with variable speed triggers are the easiest, because you can adjust RPM on the fly. Cordless drills, especially the higher-torque models, often have a “low speed, high torque” setting that’s perfect for larger hole saws—cranking the RPM too high on a cordless drill not only wastes battery life but can cause the drill to slip or the saw to grab the material, a common cause of kickback. I always tell DIYers to use the lowest speed that gets the job done; it’s better to take a minute longer and get a clean cut than to rush and have an accident.
As a hole saw supplier, I’ve also noticed that a lot of new users skip the pilot bit, which throws all cutting speed calculations off. The pilot bit’s job isn’t just to keep the hole saw from walking—it also guides the saw straight, and the cutting speed starts once the pilot is set. If you start cutting too fast before the pilot is seated, you’ll have a wandering hole, and once you get it aligned, you’ll already be going too fast. Always let the pilot bit dig in 1/8 inch before you start feeding the saw into the material steadily.
What about common mistakes I see all the time? The biggest one is assuming that “more speed = faster cut.” That’s true for twist bits, but not for hole saws, because the large contact area means heat is the limiting factor. I had a customer last year who was installing a bunch of PVC pipes for a plumbing job, using a 3-inch bi-metal hole saw. He set his corded drill to 1000 RPM, which for his hole saw was over 400 FPM—way too high for PVC. He ended up with melted plastic all over his wall, a dull saw, and had to order a new one and redo the holes. After we walked through the cutting speed formula, he dropped his RPM to 120, got clean cuts in half the time, and didn’t have to replace his materials. That’s the kind of real-world lesson that makes all the difference.
Another mistake is not adjusting for different materials when switching projects. If you’re a contractor who cuts wood all day, you might get used to running your drills at 300-500 RPM for small holes, but if you switch to cutting stainless steel, that same RPM will be way too fast, ruining your hole saw in a single cut. I always include a quick reference guide with every hole saw set we ship, with Vc ranges for common materials, because it’s hard to remember all the numbers when you’re in the middle of a job.
So how do you put this all into practice, step by step, for your next hole saw project? Let’s make it simple. First, identify the material you’re cutting, and find the ideal Vc range for that material. Second, measure the diameter of your hole saw. Third, use the RPM formula (RPM = (Vc x 4) / hole saw diameter) to calculate your target RPM. Fourth, set your drill to that RPM, and adjust slightly based on cut depth—drop 20% for cuts deeper than the saw’s length, and add 10% for shallow cuts. Fifth, start slow with the pilot bit, feed steadily, and listen to the sound of the saw. If it’s making a high-pitched squeal, that’s a sign you’re going too fast; if it’s growling or the material is burning, slow down.
As a hole saw supplier, our goal isn’t just to sell you a good saw—it’s to make sure you use it correctly, so you get great results every time. Cutting speed isn’t a trick or a complicated number only for machinists; it’s a basic principle that makes your hole saw last longer, your cuts cleaner, and your projects go smoother. Whether you’re a DIYer hanging new shelves, an electrician running wire, or a metal fabricator building custom parts, taking a minute to get your cutting speed right will save you time, money, and frustration in the long run.
If you’re working on a project right now and aren’t sure about the right cutting speed for your specific material, hole saw size, or application, our team is here to help. We offer tailored guidance for everything from small home projects to large industrial jobs, and we can recommend the right hole saw and settings for your needs. To discuss your project and get expert advice on cutting speeds, hole saw selection, or any other questions you have, reach out to our team to connect for a procurement consultation.
Flap Disc References
Machining Data Handbook. (2020). Modern Machine Shop.
Woodworking Machinery Operations Handbook. (2019). American Wood Council.
ASM Handbook, Volume 16: Machining. (2016). ASM International.
“Cutting Speeds and Feeds for Hole Saws.” (2022). Hole Saw Technology Journal.
Foshan Songqi Technology Co., Ltd.
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