How Does a Plunge Router Work?

Select the Right Bit

Before you start any project with the plunge router, select the bit that you need. Each bit gives several different cuts, depending on the depth that you set the router base. A router does edges and routes out patterns on the interior of the wood. Along with the selection of the bit, you also need to take measurements on the depth of the cut and set the base for that depth.

With the router unplugged, depress the spindle lock. Depending on the setup of your collet, you may need to use a special wrench to loosen it. Once it's loose, insert the bit and tighten the collet with a clockwise turn. Release the spindle lock. You may find the task easier if you put the plunge router on its side.

Use a sample piece of scrap wood if you aren't sure what depth you want, and create the depth you want on the edge. Don't plug in the router yet (if it's electric) before you set the depth. Loosen the locking bolt and then release the lever for the plunge stop. Use the scale at the side to set the depth stop. In order to set it, set the plunge router down on the scrap wood. Push the router down until the router bit touches the wood and fasten the plunge lock lever. Rotate the depth stop knob down as far as you can. This is the starting point; you adjust for depth from there. If you're routing a deep groove, make several passes and adjust the depth stop knob for each.

When you use a plunge router, you need a pattern to follow. A straight board clamped at the appropriate distance is excellent for this. Line up the board and make sure that you center the router bit so that the flat edge of the router touches the side of the straight edge so you can follow its line.

Put on your safety glasses. Push on the "Start" switch. Make sure you start the router away from the wood to avoid kickback. Slowly bring the router bit into the wood and follow the pattern you chose. If you're routing a deep pattern, you'll need a slower feed. Even the most powerful motors burn out if the pattern is too deep, so start shallow and make increasingly deeper passes each time.