How to Use A Router - Woodworking Beginner’s Guide

A router is one of the most useful shaping tools in a woodworking shop. It can round over an edge, cut a chamfer, make a rabbet, create grooves and dados, follow templates, cut joinery, and even hollow out a bowl.

That said, we’re not going to cover every single thing a router can do. There are far too many bits, jigs, and special operations for that. What I want to do here is give you a practical beginner’s guide: how routers operate, the common bits you’re likely to use, what you can do with them, and how to do it safely and accurately.

How a Router Operates

A router is basically a high-speed motor that spins a cutting bit. That bit shapes the wood by removing material. Unlike a saw, which is mostly used to cut boards to size, a router is used for shaping, profiling, grooving, trimming, and creating contours.

Routers have become more powerful through the years. Older routers were often around 1 1/2 horsepower. Today, 2 horsepower is common, and that extra power matters because many modern router bits are larger and remove more material.

But more power does not mean you should take heavier cuts. A router bit spins very fast, often around 20,000 RPM or more, and trying to remove too much material at once can cause burning, tear-out, dull bits, and loss of control.

Types of Routers

There are three main types of routers you’re likely to run into: fixed base routers, plunge routers, and trim routers.

A fixed base router is set to a specific depth of cut, and that depth stays fixed while you work. That makes it useful for edge profiles, rabbets, grooves, and many router table operations. If you’re mounting a router under a router table, a fixed base router is usually the one you’d use.

A plunge router allows the bit to move down into the work while the router is running. That makes it necessary for operations where the cut starts in the middle of the board, such as cutting letters, routing bowls, or making certain mortises. You can technically try to “tip” a fixed base router into a cut, but I don’t recommend it. It isn’t safe, and the router can walk across the surface before you have good control.

A trim router started out as a tool for trimming laminate, like on countertops. Today, trim routers are much more useful because they’re more powerful, and many are cordless. They’re convenient for small edge profiles, light chamfers, and quick jobs. Just keep in mind that cordless trim routers can go through batteries pretty quickly.

Router Tables

A router table lets you bring the workpiece to the router instead of bringing the router to the workpiece.

There are times when that’s much safer and easier. For example, routing a very small piece by hand can put your fingers too close to the bit. A router table gives you more control, though you still have to be careful and use proper workholding.

A router table also helps with operations where the board needs to be held vertically, such as cutting certain molding profiles. Architectural molding is a good example. Often, the shaped portion is only on one part of the board, and the workpiece has to be held upright against a fence to make the cut accurately.

I’ve used a small router table for years, but I eventually found it limiting. When you’re trying to route longer pieces, such as 4-foot trim boards, a small table doesn’t give enough support. The board can dip or wave, and that shows up in the cut. That’s one reason I started building a larger router table.

Common Router Bits

The bit determines what the router actually does. There are more router bits available than most of us will ever own, but beginners should understand a few common types.

A roundover bit softens the edge of a board by cutting a radius. You can get small roundovers, like 1/8 inch, or larger ones, like 1/2 inch.

A chamfer bit cuts a beveled edge. It’s useful for easing corners, adding a simple decorative detail, or creating a clean angled profile.

A straight bit cuts grooves, dados, rabbets, slots, and mortises. These are some of the most useful bits in the shop.

A rabbeting bit is similar to a straight bit, but it has a bearing that controls how far into the edge the cut goes. It’s used to make an L-shaped cut along the edge of a board.

A flush trim or pattern bit has a bearing that follows a template or an existing edge. This lets you duplicate shapes accurately.

A bowl cutting bit is used with a plunge router and template to hollow out a recess, such as a shallow tray or bowl.

Router Bit Shank Sizes

Router bits usually come in two shank sizes: 1/4 inch and 1/2 inch.

The shank is the part of the bit that goes into the router collet. That fit is critical. If the shank is even a few thousandths off, you can have trouble getting the bit to seat properly or run smoothly.

Larger bits often use a 1/2-inch shank because it can handle more stress. I once bent the shank on a 1/4-inch bowl cutting bit when the bit caught in the wood. When I replaced it, I bought the same style bit with a 1/2-inch shank.

You can use 1/4-inch bits in a 1/2-inch router with the right collet adapter. But you cannot use a 1/2-inch bit in a router that only accepts 1/4-inch bits. And honestly, you wouldn’t want to try.

Some imported router bits may also be metric, such as 6 mm, so check what you have. A digital caliper is handy for confirming shank size, especially if a bit or collet doesn’t fit quite the way you expect.

What You Can Do With a Router

The most basic router operation is edge routing. That means shaping the edge of a board with a profile such as a roundover, chamfer, ogee, bead, or bullnose.

For many woodworkers, edge routing is the first and most common router use. It’s usually done with a fixed base router or trim router, though it can also be done with a plunge router if the depth is locked securely.

Routers can also cut joinery and construction details. Tongue and groove joints, rabbets, dados, grooves, slots, pattern-shaped parts, and even dovetails can all be made with a router and the right bit or jig.

The main thing to understand is that a router almost always needs guidance. That guidance might come from a bearing, a fence, a template, or a jig.

I rarely cut freehand with a router. It’s too hard to control accurately, especially if you want a straight line or smooth curve. Even something as simple as cutting a dado across a board is better done with a clamped straightedge than by trying to steer the router by hand.

Bearings, Fences, and Templates

Some router bits have bearings. The bearing rides along the edge of the wood or along a template and controls the depth or path of the cut.

That’s how many edge profile bits work. A roundover bit with a bearing rides against the edge of the board, keeping the cut consistent. Rabbeting bits use bearings the same way.

Other bits don’t have bearings. With those, you need a fence, guide, or template. That might be the fence on a router table, an edge guide attached to the router, or simply a straight board clamped across your workpiece.

Templates are especially useful when you need to make the same shape more than once. Say you’re making several rocking chairs and need the rockers to match. You can cut one clean template, rough cut the parts on the bandsaw, then use a pattern bit to make every piece identical.

Router Direction and Grain Direction

Router direction matters. If you feed the router the wrong way, it can grab and try to run away from you.

With a handheld router, the simple trick is to make an L with your right hand. Put your thumb on the edge of the board. Your finger points in the direction the router should travel.

On a router table, the direction is opposite because the router is upside down.

Grain direction also matters. Just like with a hand plane, routing against the grain can cause tear-out. If the bit catches the grain the wrong way, it can pull out a large splinter and ruin the edge.

The safest answer is still to feed the router in the proper direction, but take lighter cuts. Instead of routing the whole edge in one long pass, work in short sections. It takes longer, but it protects the wood.

Take Light Passes

One of the biggest beginner mistakes is trying to remove too much material at once.

If you’re cutting a deep bowl, don’t try to plunge 3/4 inch in one pass. That asks too much of the router, creates heat, and can burn the wood or dull the bit.

A better approach is to make multiple passes, removing about 1/8 inch at a time, or maybe 1/4 inch at most depending on the bit and material.

The larger the bit, the slower the router speed should be. A small bit can run faster. A 2-inch bit should run slower. A 3-inch bit needs to run slower yet. That’s why many modern routers have variable speed controls.

As a general idea, bits up to about 1 inch can run at higher speeds. A 2-inch bit may need to be closer to 16,000 RPM, and a 3-inch bit may need to be around 12,000 RPM.

Edge Routing on the Workbench

When routing an edge by hand, support the work securely. I like using holdfasts or clamps to keep the board from moving.

You also need to make sure the bit, bearing, or screw at the bottom of the bit won’t hit the bench. If you’re using a large chamfer bit or another profile that extends below the board, raise the workpiece on a spacer board so the bit has clearance.

For edge routing, I usually start with the end grain first and then do the long grain. That helps reduce tear-out at the corners. End grain usually cuts rougher than long grain, so expect to do a little sanding afterward.

If a roundover bit leaves a small ridge, don’t panic. That often happens when the bit height isn’t set perfectly. A block plane can usually blend that ridge into the curve with just a few passes.

When to Use the Router Table

A router table is helpful when the workpiece is small, when the profile extends below the board, or when the operation is hard to control with a handheld router.

Small parts are one of the trickiest router jobs. You should never have your fingers close to the bit. A router table helps, but you still need a safe way to hold the part.

For small round pieces or short parts, I use clamps or a simple hold-down jig. A jig can be as basic as a plywood base, a small track, a stop block, and a hold-down clamp. Sandpaper on the underside helps keep the part from slipping.

With the piece held securely, you can route the edge without putting your fingers near the bit. That’s the whole point. The router table makes the operation possible, but the workholding makes it safe.

Cutting Rabbets

A rabbet is an L-shaped cut along the edge of a board.

You might use a rabbet to inset the bottom of a small box, the back panel of a cabinet, or any piece that needs to sit into the edge of another part.

A rabbeting bit has a bearing that controls the width of the cut. You can also cut a rabbet with a straight bit and a fence, but the bearing makes the setup simple.

Cutting Dados and Grooves

A dado is a U-shaped cut that goes across the grain. A groove is the same basic cut, but it runs with the grain.

People often use the word dado for both, and that’s not the end of the world. The important thing is knowing what the cut does.

Dados are very useful for shelves. Instead of simply screwing or nailing a shelf between two sides, you can cut a dado in each side and set the shelf into it. That gives the shelf much stronger support.

Grooves are often used for panels, drawer bottoms, and other inset parts.

These cuts can be made with a handheld router and a fence, or on the router table. If you’re using a handheld router, don’t try to cut them freehand. Clamp a straightedge or use the router’s edge guide.

Cutting Slots for Jigs and Fixtures

A router table is also useful for cutting slots.

Slots are handy when building shop jigs and fixtures because they let you adjust the position of a knob, bolt, fence, or hold-down. Instead of a fixed hole, the slot gives you movement.

To cut a slot on the router table, set up stop blocks so the workpiece can only travel as far as needed. Then lower the workpiece onto the bit, move it between the stops, and lift it off safely.

That gives you a clean adjustable slot for knobs or threaded hardware.

Final Thoughts

A router is not just for rounding over edges. Once you understand how it operates, which bits to use, and how to guide the cut, it becomes one of the most versatile tools in the shop.

The important thing is not to rush it. Use the right bit, support the work, guide the router with a fence, bearing, or template, and take light passes. Pay attention to feed direction and grain direction, and wear hearing protection because routers are loud.

Routers make a lot of sawdust, but they can also make some beautiful details. Once you learn the basics, you’ll find more and more ways to use one in your woodworking.