From TechnoDocs
Spindles are the business end of the router. They provide the rotational torque that does the work of cutting.
Major brands
Colombo, HSD, Kress, and Porter-Cable. We use primarily Colombo and HSD spindles. Kress and Porter-Cable spindles are basically just souped-up Dremels.
Replacement
Important factors for replacing a spindle are: HP, Voltage, Amperage, and RPMs found on the nameplate (see fig 2). As there may be multiple specs on a nameplate, a PICTURE is usually the best way to determine the right motor.
