Johnson Geared Motor 500RPM 12V DC

Johnson is a recognized name in the geared-motor space, and this unit's all-metal gearbox construction is what distinguishes it from the plastic-gear BO motors common at the budget end of hobby robotics - metal gears handle sustained torque and repeated load cycling without the gradual tooth wear plastic gears eventually show. Base motor speed of 18,000 RPM gets reduced through the gearbox down to a practical 500RPM at the output shaft, trading raw speed for genuinely usable torque (10kg-cm).

Metal bushes at the bearing points add further wear resistance beyond what the gears alone provide, and a coupling hole machined into the shaft simplifies attaching wheels or other drive components without needing a separate set-screw coupler design. A load current rating up to 9.5A signals this motor can handle real mechanical resistance without stalling or overheating, well beyond what small BO or N20 motors are rated for.

Common uses are mid-size robot chassis needing more torque and durability than budget BO motors provide, DIY go-kart or small vehicle drive systems, and robotics projects where motor reliability under sustained load genuinely matters.