The micro plastic gearmotor’s output shaft is compatible with our 14 mm wheels. We don’t have any Micro Planetary Gear Motor brackets for this gearmotor, and it generally does not have any mounting holes, but its compact size makes it simple to fasten with tape or glue. On the other hand, since this gearmotor is nearly the same size as a 1/4″ fuse, it could be mounted using standard 1/4″ (6 mm) fuse clips.
The following diagram shows the micro plastic gearmotor dimensions in mm. The planetary gearbox includes a D-shaped plastic output shaft, which is 2 mm in diameter with a section that’s flattened by 0.5 mm. The “D” portion of the shaft can be 2.5 mm long. The motor measures 6 mm in diameter and 9 mm in length, and the gearbox duration, labeled “L” in the diagram below, depends upon the gear ratio. The 26:1 gearbox is 7.1 mm long, as the 136:1 option steps 9.4 mm. The engine leads include their ideas pre-stripped and extend around 2 cm (0.8″) from the back of the motor.
Because the gearmotor’s output shaft is nylon, there can be small variances in the diameter from unit to unit. These variations might cause press-suit attachments like our 14 mm wheel to fit loosely in some instances. If you experience a loose fit, you could try swapping tires or using a little dab of glue to greatly help hold the wheel on.