The micro plastic gearmotor’s output shaft works with with our 14 mm wheels. We do not have any brackets for this gearmotor, and it 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 almost the same 
size as a 1/4″ fuse, it could be mounted using standard 1/4″ (6 mm) fuse clips.
Motor accessories
The following diagram shows the micro plastic gearmotor dimensions in mm. The planetary Micro Planetary Gear Motor gearbox has 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 is usually 2.5 mm long. The electric motor steps 6 mm in diameter and 9 mm long, and the gearbox duration, labeled “L” in the diagram below, depends upon the apparatus ratio. The 26:1 gearbox is 7.1 mm long, while the 136:1 option actions 9.4 mm. The engine leads include their suggestions pre-stripped and extend around 2 cm (0.8″) from the back of the motor.
Gearmotor dimensions
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-fit attachments like our 14 mm wheel to fit loosely in some instances. If you experience a loose fitting, you could try swapping wheels or using a little dab of glue to greatly help hold the wheel on.