Choosing the Right Cutting Tool: Router Bits, Forstner Bits, and Band Saw Blades Without the Mistakes I Made
If you've ever searched for 'best router bits' and found an article that treats every workshop as the same, you know why that advice misses. The right cutter depends on the machine, the material, and the task. There isn't one universal winner. So instead of pretending there is, I'll break down the choices the way I sort them in our shop.
I manage tool ordering and setup for a small custom cabinet shop. I don't pretend to know every blade geometry, but I do keep a mistake log. I started it in 2017, after a few expensive errors made a pretty clear point. This is basically the cutting-tool section of that log.
Most 'which cutter should I use' questions fall into one of four scenarios:
- You're routing an edge, profile, or joint in wood. Here, shank size and bit quality matter most.
- You're drilling a large or flat-bottomed hole in wood. This is usually a Forstner bit job, not a spade bit job.
- You're cutting curves or resawing on a band saw. The blade width and teeth per inch need to match the task.
- You're cutting metal or repairing a door. Stop thinking like a woodworker and pick the tool for that specific job.
Find the scenario that matches the work in front of you. If you're still unsure, there's a short checklist at the end.
Scenario 1: Routing Edges, Profiles, or Joinery in Solid Wood
Take it from someone who ran a $65 bit set for way too long: shank size matters more than most first-time buyers think. A 1/4-inch shank bit is fine for light edge trimming. When you push a deep profile through hard maple or oak, the smaller shank can flex. And flex means chatter, burning, or both.
A 1/2-inch shank bit is more stable in the collet, so it cuts more predictably. That makes the first question a compatibility question: does your router accept a 1/2-inch collet? If it does, buy 1/2-inch shank bits for the profiles you actually use. If you only own a trim router with a 1/4-inch collet, don't buy 1/2-inch bits and hope they'll fit. That mistake is easier to avoid than to fix.
My own version of that mistake was buying a 20-piece router bit set for about $65. The value math seemed obvious: a whole set for less than the price of one quality bit. But the 1/4-inch shank round-over bit I grabbed wandered along a long maple edge and left a burned profile. I had to scrap that piece and start over. The set was cheap per bit and expensive per usable part.
When I finally compared generic router bits side by side with Freud router bits 1/2 shank, the difference wasn't subtle. The cheaper bit chattered on a long hardwood edge. The Freud bit cut cleanly. The Freud bits cost more, but they cut the way I expected. In a shop, that predictability is what saves money.
The counterintuitive part is this: don't buy the full set. If I could redo my first purchase, I'd pick the three or four profiles I used every week and buy quality versions of those. Trust me on this one.
Scenario 2: Drilling Clean, Flat-Bottomed Holes in Wood
If you're drilling hinge cup holes, lockset holes, or any hole where the back side needs to stay clean, a spade bit is the wrong tool. I found this out while retrofitting European hinges on cabinet doors. One spade-bit hole looked fine from the front and blew out a chunk at the exit. A door that was nearly done went straight to the scrap pile.
A Forstner bit cuts with an outer rim that scores the wood before the cutting edges remove the waste. The result is a much cleaner edge and a flat bottom. That makes it the right choice when you need a blind hole at a precise depth, or when you want a through-hole with less breakout.
That's when I started ordering Freud Forstner drill bits in the sizes we kept hitting. I didn't get one of those huge sets—just three or four diameters that came up again and again. They've held up well, and none of them has given me the back-side tear-out I used to accept as normal.
If you're working on a door, hinge hardware, or anything with a visible bore, this is the scenario to remember. You don't want to learn it by drilling into a finished face.
Scenario 3: Band Saw Work on a 12-Inch Band Saw
The mistake I want you to avoid is searching for 12 inch band saw blades and choosing one only by length. Length has to match your machine, sure. But cutting performance comes from blade width and teeth per inch.
If you're cutting tight curves, you need a narrower blade that can follow the radius without being forced. If you're resawing thicker stock, you want the widest blade your saw can tension, with a coarse tooth count that clears sawdust. No single blade does both well. Trying to make one blade do everything is exactly how you get a wandering cut in the middle of a good piece of wood.
Before you order, write down the tightest radius you'll cut and the thickest stock you'll resaw. If the two are far apart, buy two blades. Changing a blade takes a few minutes. Redoing a ruined panel takes a lot longer.
Scenario 4: Metal Cutting and Repair Jobs That Aren't About New Tools
Sometimes the job in front of you has nothing to do with wood. You're building a concrete form and need rebar cut. Or a shed door hinge has pulled out of the frame and you're trying to figure out which bit or blade this needs. Step back, because the answer isn't a new router bit.
Can you cut rebar with an angle grinder? Short answer: yes, if you use the right disc. A steel cut-off wheel rated for your grinder's speed will do it. Clamp the rebar so it doesn't roll, wear a face shield, and let the wheel do the cutting. I'm not a metallurgist, so I won't start recommending specific wheels by brand. What I can tell you from a shop manager's perspective is: don't reach for a wood-cutting blade when you do this. That's a different tool category entirely.
The same logic applies to a shed door hinge replacement. Last fall, I replaced one on our own shed. The old hinge didn't fail because the metal broke; the screws had stripped out of the soft frame. My first instinct was to move the hinge up an inch and start fresh in new wood. That would have changed the door alignment and left the old holes exposed to weather. Instead, I filled the old holes with glue and dowels, let them dry, and drilled fresh pilot holes for the replacement screws. No Forstner bit or router bit was needed. The fix was patience and pilot holes.
How To Tell Which Scenario You're In
Here's the short checklist I give to the team I work with.
- Is the material metal? Stop and get metal-specific cutting tooling. For rebar, an angle grinder with a steel cut-off disc is the usual answer.
- Is the workpiece wood and the problem a hole? Use a Forstner bit for clean flat-bottomed holes, especially in hinge or hardware locations.
- Is the workpiece wood and the problem a routed profile? Use a quality router bit with a 1/2-inch shank if your router can take it. Skip the 20-piece sets.
- Is the workpiece wood and the problem a band saw cut? Pick blade width by the tightest radius and TPI by the thickness of the stock.
- Is the problem stripped hinge screws or a sagging shed door? This is a repair job, not a cutting-tool purchase. Fill old holes, drill fresh pilots, and drive the right screws.
Bottom line: It is not about buying one bit to rule them all. It's about matching the tool to the actual cut and the actual material. That's the difference between a drawer full of unused accessories and a shop that doesn't waste time on re-dos.