Wood Router Guide: Fixed vs. Plunge, Bit Types, and Edge Profiles

A router is the most versatile shaping tool in woodworking. It cuts edge profiles, dadoes, rabbets, dovetails, mortises, inlays, and decorative patterns. It trims laminate flush, follows templates for identical parts, and creates joinery that would take hours by hand. But routers spin at 10,000 to 25,000 RPM and remove material aggressively. The wrong bit, wrong feed direction, or wrong depth of cut creates kickback, burning, or tearout. This guide covers how to choose the right router, match bits to tasks, and use the tool safely.

Fixed-Base vs. Plunge Routers

A fixed-base router has the motor locked at a set depth. You adjust the cutting depth before starting the router using a threaded depth adjustment ring or lever, then guide the spinning bit along the workpiece edge or against a fence. Fixed-base routers are simpler, lighter, and more rigid than plunge routers. The motor sits lower in the base, which keeps the center of gravity closer to the work surface and makes the tool easier to control during edge profiling, template work, and router table use.

A plunge router lets you lower the spinning bit into the workpiece while the motor is running. Spring-loaded columns allow the motor to plunge down and retract back up. This is necessary for interior cuts where you cannot start from an edge: mortises, inlays, sign carving, hinge recesses, and stopped dadoes that begin and end in the middle of a board. The plunge mechanism adds weight (typically 1 to 2 pounds) and introduces some play in the column travel, but gives you capability that a fixed-base router cannot match.

A combo kit with both bases and one motor is the best value for most woodworkers. You swap the motor between the fixed base (for edge work and the router table) and the plunge base (for interior cuts) as needed. This avoids buying two separate routers while covering both use cases completely. DeWalt DW618PK, Bosch 1617EVSPK, and similar combo kits run $200 to $280 and include both bases, a collet set, and a wrench.

Motor size matters for the type of work you plan to do. A 1-1/4 HP compact router handles light edge profiling, hinge mortises, laminate trimming, and small roundover work. A 2 to 2-1/4 HP mid-size router handles most woodworking tasks including router table duty, larger profile bits, and dado cutting in hardwood. A 3+ HP full-size router is for heavy-duty production use with panel-raising bits, large-diameter bits that need slow speed and high torque, and continuous router table operation. For home woodworking, the mid-size range is the sweet spot that avoids both underpowered stalling and unnecessary weight.

Router Bit Types

Straight bits cut flat-bottomed grooves, dadoes, and rabbets. They come in diameters from 1/8-inch to 1-1/2-inch and are the workhorses of router joinery. A 1/4-inch and a 1/2-inch straight bit handle most dado and groove work for shelving, drawer bottoms, and panel backs. Spiral-cut straight bits (available in up-cut, down-cut, or compression configurations) produce cleaner cuts than standard straight-flute bits, especially in plywood and hardwood. Up-cut spirals eject chips efficiently but can cause tearout on the top surface. Down-cut spirals push chips down for a clean top edge but can clog in deep cuts.

Roundover bits create a rounded edge profile and are the most common decorative edge in furniture and trim. A 1/4-inch roundover is subtle and elegant, barely noticeable on a finished piece. A 3/8-inch roundover is the standard furniture edge seen on tabletops, shelf edges, and cabinet face frames. A 1/2-inch or larger creates a bold, pronounced round that gives edges a soft, substantial feel. Roundover bits have a pilot bearing that rides along the workpiece edge to control the cut depth automatically, so you do not need a fence or straightedge.

Chamfer bits cut a 45-degree bevel on edges. They produce a crisp, modern look compared to the softer roundover. A chamfer bit with a bearing lets you cut consistent bevels without a fence, following the workpiece edge naturally. Chamfer size is specified by the bevel width: a 1/4-inch chamfer removes a 1/4-inch flat at 45 degrees from the corner. Chamfers work well on both hardwood and plywood edges, and the angled cut is more forgiving of slight tearout than a flat edge.

Flush-trim and pattern bits follow a template or existing edge to produce identical parts. Flush-trim bits have the pilot bearing on the bottom (shank end) and cut material flush with a template mounted below the workpiece. Pattern bits have the bearing on the top and follow a template mounted above. Both are essential for making identical parts from a master template: cut the template once to perfect shape, then use a pattern or flush-trim bit to duplicate it in production stock. The bearing diameter matches the cutting diameter exactly, so the finished edge is perfectly flush with the template.

1/4-Inch vs. 1/2-Inch Shank

Router bits come with 1/4-inch or 1/2-inch shanks. The shank is the smooth cylindrical part that the router collet grips. Half-inch shanks are stiffer, vibrate less, and handle heavier cuts without deflection. The larger shank cross-section has four times the stiffness of a 1/4-inch shank (stiffness scales with the fourth power of diameter), which translates directly to smoother cuts and less chatter on finished surfaces.

Use 1/2-inch shank bits whenever your router accepts them. Most mid-size and full-size routers come with both 1/4-inch and 1/2-inch collets that swap out in seconds. Compact routers typically accept only 1/4-inch shanks due to the smaller collet housing. If a bit is available in both shank sizes, the 1/2-inch version produces better results in every measurable way: less vibration, less deflection, smoother finish, and lower risk of bit breakage under load.

Carbide-tipped bits outlast high-speed steel (HSS) bits by a wide margin. The carbide cutting edges stay sharp through hardwood, plywood, MDF, and even abrasive materials like laminate and solid surface. HSS bits are cheaper but dull quickly on anything harder than softwood, and a dull bit burns wood, produces rough edges, and increases the load on the router motor. For the small price difference (typically $5 to $15 more per bit), carbide is the only practical choice for most routing work. The exception is bits for very specific one-time uses where you need an unusual profile and a cheap HSS bit will do.

Bit diameter determines the maximum profile size and directly affects safe operating speed. Edge-profiling bits (roundover, chamfer, cove, ogee) are available from 1/4-inch to over 3 inches in diameter. Larger-diameter bits require slower router speed because the rim of the bit travels much faster at the same RPM. A 3-inch bit at 25,000 RPM has a rim speed that is dangerously fast and can overheat or throw the bit. Follow the speed chart on the bit packaging or in the router manual. A general guideline: bits up to 1 inch in diameter can run at full speed, 1 to 2 inches should run at 18,000 to 22,000 RPM, and bits over 2 inches should run at 10,000 to 16,000 RPM.

Feed Direction and Safety

Feed the workpiece against the bit rotation. On a handheld router, this means moving the router from left to right along the edge when the router is between you and the workpiece. The bit rotation resists the feed direction, giving you control. Moving with the rotation (called climb cutting) allows the bit to grab the workpiece and pull the router forward uncontrollably. Climb cutting can throw the router or yank the workpiece away from you. It has specific uses for preventing tearout on difficult grain, but only in light finishing passes where you maintain firm control.

Take multiple light passes rather than one deep cut. For a 3/8-inch roundover, set the bit depth to remove half the material on the first pass and the full profile on the second pass. Deep single passes cause burning (the bit spends too long in contact with the wood), tearout (the forces exceed the wood's strength and fibers rip instead of cutting cleanly), and bit deflection (the shank bends under load, creating an uneven profile). They also increase kickback risk because the bit is buried in the wood and has nowhere to go if it grabs a hard grain pocket.

End grain routes before long grain. When routing all four edges of a panel, cut the end-grain edges first. The bit exit at the end of an end-grain cut tears out a small chip at the corner because there is no supporting material beyond the edge. The subsequent long-grain pass removes that chip and leaves a clean corner. If you route long grain first, the end-grain pass tears out the already-finished edge and you have to re-route or sand out the damage.

Use hearing protection and a dust mask every time. Routers are among the loudest power tools in the shop, producing 90 to 100 dB of sustained noise that causes hearing damage over time. They also produce extremely fine dust that stays airborne for hours. A dust port connection to a shop vacuum captures most of the dust at the source. Eye protection is mandatory, and a full face shield is better than safety glasses for large-diameter bits that throw chips at high velocity. Secure the workpiece firmly with clamps before routing. A workpiece that shifts mid-cut ruins the profile and can cause the router to kick.

Router Table Basics

A router table inverts the router so the bit points up through a flat table surface. The workpiece moves across the table and past the bit, guided by a fence. This configuration is safer and more precise for small workpieces that are difficult to route with a handheld router because the piece would be unstable or your hands would be too close to the bit. Edge profiling on narrow stock, cope-and-stick joinery for cabinet doors, and raised panel cutting all become practical with a router table.

The fence is the most important part of a router table setup. A good fence is straight, adjustable, and has dust collection built in. Split fences (two independent halves) allow you to offset the outfeed side for jointing operations. For most edge profiling, the fence serves the same role as a table saw fence: it positions the workpiece at a consistent distance from the bit.

Featherboards and hold-downs keep the workpiece pressed against the fence and table during routing. Without them, the bit can pull the workpiece away from the fence or lift it off the table, ruining the cut and creating a safety hazard. Spring-loaded featherboards clamp to the fence or table and apply consistent pressure. For serious router table work, a set of featherboards is as important as the fence itself.

Frequently Asked Questions

What Router Should I Buy First?

A mid-size (2 to 2-1/4 HP) combo kit with both fixed and plunge bases. This covers edge profiling, dadoes, template routing, and router table use. Bosch 1617EVSPK, DeWalt DW618PK, and Makita RT0701CX7 (compact) are all solid choices at different price points. The compact Makita is lighter and easier to handle but less powerful for heavy cuts.

Why Does My Router Burn the Wood?

Burning happens when the bit spends too long in one spot. This results from moving too slowly, pausing at corners, or taking too deep a cut in a single pass. Move the router at a steady, consistent pace. Take lighter passes. Also check the bit: a dull carbide edge generates more friction and burns more easily than a sharp one. Finally, some woods (cherry, maple, and other dense species) burn more easily than others. Increase feed speed on those species.

Do I Need a Router Table?

A router table makes small workpieces safer and easier to route (the piece moves, not the router) and enables operations like raised panel doors and cope-and-stick joinery that are impractical with a handheld router. If you do a lot of edge profiling on small pieces, a router table saves time and improves consistency. For occasional use, a handheld router with a fence handles most jobs.

Related Reading

• Drill Bit Guide
• Dust Collection Guide