Editing Router (woodworking) (section)

== Features of the modern spindle router ==
[[File:RouterJig.jpg|thumb|Template guide bushing secured in the base around the router cutter]]
The tool usually consists of a base housing a vertically mounted universal [[electric motor]] with a [[collet]] on the end of its shaft. The bit is height-adjustable to allow protrusion through an opening in a flat sole plate, usually via adjusting the motor-mounting height (the mechanism of adjustment is widely varied among manufacturers).  Control of the router is derived from a handle or knob on each side of the device, or by the more recently developed "D-handle".

There are two standard types of router—plunge and fixed. When using a '''plunge-base router''', the sole of the base is placed on the face of the work with the cutting bit raised above the work, then the motor is turned on and the cutter is lowered into the work. With a '''fixed-base router''', the cut depth is set before the tool is turned on. The sole plate is then either rested flat on the workpiece overhanging the edge so that the cutting bit is not contacting the work (and then entering the work from the side once the motor is turned on), or the sole plate is placed at an angle with the bit above the work and the bit is "rocked" over into the work once the motor is turned on. In each case, the bit cuts its way in, but the plunge router does it in a more refined way, although the bit used must be shaped so it bores into the wood when lowered.

The baseplate (sole plate) is generally circular (though this, too, varies by individual models) and may be used in conjunction with a fence attached to the base, which then braces the router against the edge of the work, or via a straight-edge clamped across the work to obtain a straight cut. Other means of guiding the machine include the template guide bushing secured in the base around the router cutter, or router cutters with built-in guide bearings. Both of these run against a straight edge or shaped template. Without this, the varying reaction of the wood against the [[torque]] of the tool makes it impossible to control with the precision normally required.