Wood Router Buying Guide: Fixed vs Plunge, Speed Control, and Bit Selection
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A router spins a shaped bit at high speed to cut profiles, grooves, dadoes, and joints in wood. It is the most versatile shaping tool in a woodworking shop. Edge profiles, decorative inlays, dovetails, mortises, template work, and sign carving all come from the same tool with different bits and setups. The buying decision starts with whether you need a fixed-base, a plunge, or a combination kit that includes both. From there, power, speed control, and collet size determine what the router can handle.
Fixed-Base vs Plunge
A fixed-base router sets the bit depth before you start cutting and maintains that depth throughout the entire cut. You adjust the depth by loosening a clamp, raising or lowering the motor housing in the base, and re-tightening. The depth does not change during the cut. This design is simpler, typically 1 to 2 pounds lighter, and easier to control for edge work where the bit enters from the side of the workpiece.
Fixed-base routers are also the natural choice for router table mounting. The motor housing sits in the base with a flat, stable platform on top. Most router table insert plates are designed around fixed-base housings. If you plan to use a router table for most of your work, a fixed-base router is the right starting point.
A plunge router lets you lower the spinning bit into the material from above and then move it laterally. This is essential for interior cuts: mortises, inlays, stopped grooves, sign lettering, and any cut that starts and stops in the middle of the workpiece. Plunge routers have spring-loaded columns that the motor housing rides up and down on. A depth stop turret with multiple positions lets you make progressively deeper passes without readjusting between each one.
The tradeoff with plunge routers is bulk. The spring columns and plunge mechanism add weight and height, making the tool slightly harder to control for simple edge profiling. The handles are typically positioned higher, which changes the feel compared to the low, compact grip of a fixed-base router.
Combination kits include one motor and both a fixed base and a plunge base. This is the best value if you need both capabilities. Swap the motor between bases depending on the task. Most major manufacturers, including Bosch, DeWalt, Porter-Cable, and Makita, offer combination kits in the $200 to $350 range. For a first router purchase, the combination kit covers the widest range of work without compromise.
Power and Speed
Router power is rated in horsepower or amps, and the two scales roughly correspond: a 1-3/4 HP router draws about 11 amps, a 2-1/4 HP router draws about 15 amps. A 1-3/4 HP router handles most woodworking tasks, including edge profiling, dadoes, rabbets, and moderate template work. It will slow down in deep cuts through hardwood or with large-diameter bits, but for the majority of home workshop use, this power level is sufficient.
A 2-1/4 HP (15-amp) or larger router is needed for heavy-duty work: raised panels, large roundovers in hardwood, deep mortises, and continuous production routing. The extra power maintains bit speed under heavy load, which produces cleaner cuts and reduces the risk of burning the wood. If you plan to mount the router in a table and use large bits regularly, the 2-1/4 HP class is the minimum.
Compact (trim) routers at 1 HP or less handle edge profiles, hinge mortises, and light decorative work. They are small enough to use one-handed, which is a real advantage when routing edges on assembled cabinets or installed trim. The limitation is that they cannot power bits larger than about 1 inch in diameter or make deep cuts in hardwood.
Variable speed is essential. Large-diameter bits must run at lower RPM to keep the tip speed within safe limits and produce clean cuts. A 3-1/2-inch raised panel bit at full speed (25,000 RPM) is dangerous. The rim of the bit is traveling at over 200 miles per hour, which exceeds the safe operating range. The cut quality is terrible, and the forces on the bit and collet are extreme. Variable speed lets you dial the RPM down to 12,000 to 16,000 for large bits, per the manufacturer's speed chart.
Soft start is a feature that gradually ramps the motor from zero to the set speed over about one second, rather than jolting instantly to full RPM. This matters with large bits where the sudden startup torque can twist the router in your hands. Soft start also extends motor and bearing life by reducing the inrush current that stresses windings during startup. Most mid-range and premium routers include soft start as standard.
Collet Size
The collet is the precision chuck that grips the bit shank. Two sizes exist in the consumer and professional market: 1/4-inch and 1/2-inch. Full-size routers (1-3/4 HP and up) accept both sizes, either natively with two collets included or through a 1/4-inch adapter collet. Trim routers are typically 1/4-inch only.
Half-inch shank bits are stiffer, which means less vibration, less deflection during heavy cuts, and cleaner results. The extra shank mass also dissipates heat better, extending bit life. For any bit larger than about 1 inch in cutting diameter, a 1/2-inch shank is strongly preferred. The difference in cut quality between a large profile bit on a 1/4-inch shank versus a 1/2-inch shank is immediately visible.
If you can only have one collet size, choose a router that accepts 1/2-inch shanks. You can always step down to 1/4-inch bits with an adapter collet, but you cannot use 1/2-inch bits in a 1/4-inch-only router. The 1/2-inch collet future-proofs your setup as you add larger and more specialized bits to your collection.
Keep the collet clean and replace it when the gripping surfaces show wear. A worn collet allows the bit shank to slip during heavy cuts, which ruins the workpiece and can break the bit. Collets are inexpensive replacement parts, typically $10 to $20, and should be considered a maintenance item rather than a lifetime component.
Essential Router Bits
Roundover bit: the most-used edge profile in general woodworking. It softens sharp edges on shelves, tabletops, window sills, and trim boards. Available in 1/8, 1/4, 3/8, and 1/2-inch radii. A 1/4-inch roundover covers most general use. A 1/8-inch roundover produces a subtle eased edge. A 1/2-inch roundover creates a bold, fully rounded profile. The bearing on the bottom rides along the workpiece edge, keeping the cut consistent.
Straight bit: cuts grooves, dadoes, and rabbets. Available in 1/4, 3/8, 1/2, and 3/4-inch widths. A 1/2-inch straight bit handles the majority of joinery and groove work, including bookshelf dadoes, cabinet back rabbets, and sign lettering channels. Spiral-flute straight bits cut cleaner than standard straight bits because the flute geometry lifts chips out of the groove rather than packing them back in.
Flush-trim bit: follows a template to duplicate shapes. The bearing rides along the template edge while the cutter trims the workpiece flush. Essential for pattern routing, duplicating parts, and trimming edge banding. Available with bearings on the top or bottom of the cutter, which determines whether the template goes above or below the workpiece.
Chamfer bit: cuts a 45-degree bevel on edges. An alternative to roundover for a more geometric, contemporary look. Also useful for creating V-grooves when plunged into a flat surface. A 45-degree chamfer bit with a 1/2-inch cut length handles most edge chamfering tasks.
Rabbet bit: cuts a step (rabbet) along an edge for joining panels, setting glass into frames, or recessing cabinet backs. The depth of the rabbet is set by the bearing size. Interchangeable bearings create different rabbet widths from the same bit. A rabbet bit set with multiple bearings typically costs $25 to $40 and covers widths from 1/4 inch to 1/2 inch.
Start with these five types in 1/2-inch shank versions. They cover edge profiling, joinery, templating, and decorative work. Add specialty bits (dovetail, cove, ogee, raised panel) as specific projects demand them. Carbide-tipped bits last much longer than high-speed steel and are the standard for all but the most infrequently used profiles.
Router Safety
Always feed the router against the direction of bit rotation. For handheld routing, this means moving the router from left to right along the edge of the workpiece (when the workpiece is between you and the router). Feeding with the rotation causes the bit to grab the wood and pull the router forward uncontrollably, a dangerous condition called climb cutting.
Make deep cuts in multiple passes. Trying to remove more than 1/4 inch of material in a single pass overloads the bit, burns the wood, and puts excessive stress on the motor. For a 1/2-inch-deep dado, make two passes at 1/4 inch each. For a deep profile, take three or four light passes rather than one heavy one. The final light pass produces the cleanest surface.
Secure the workpiece firmly. A router bit spinning at 20,000 RPM can grab and throw a loose workpiece with dangerous force. Clamps, bench dogs, or a router table fence keep the material stationary. Never hold a small workpiece by hand against a handheld router.
Wear hearing protection and eye protection for every routing operation. Routers operate at 90 to 100 decibels and throw chips at high velocity. A dust collection setup connected to the router or router table significantly reduces airborne dust, which matters especially when routing MDF, which produces very fine, irritating particles.
Frequently Asked Questions
Should I get a trim router or a full-size router?
If you only do edge profiling and light work, such as roundovers, chamfers, and hinge mortises, a trim router is lighter and easier to handle one-handed. If you do any joinery, dado cutting, raised panels, or template work, a full-size router is necessary. Many woodworkers own both: the trim router stays on the bench for quick edge work, and the full-size router handles everything else. A trim router typically costs $80 to $130, making it an affordable addition if you already own a full-size unit.
Do I need a router table?
A router table turns a handheld router into a small shaper. It is safer and more controlled for small workpieces, narrow stock, and repetitive edge profiling. The workpiece moves past the bit rather than the other way around, which provides better control and more consistent results on small parts that would be difficult to rout handheld. You can build a simple router table from a piece of 3/4-inch MDF and a commercial insert plate for under $100. If you do any volume of routing, a table improves both quality and safety.