The micro plastic gearmotor’s output shaft is compatible with our 14 mm wheels. We do not have any brackets for this gearmotor, and it generally 
does not have any installation holes, but its small size makes it simple to fasten with tape or glue. Additionally, since this Micro Planetary Gear Motor gearmotor is nearly the same size as a 1/4″ fuse, it could be mounted using regular 1/4″ (6 mm) fuse clips.
Motor accessories
The next 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” part of the shaft is definitely 2.5 mm long. The motor measures 6 mm in diameter and 9 mm in length, and the gearbox length, labeled “L” in the diagram below, depends on the apparatus ratio. The 26:1 gearbox is certainly 7.1 mm long, as the 136:1 option actions 9.4 mm. The electric motor leads include their tips pre-stripped and extend approximately 2 cm (0.8″) from the back of the motor.
Gearmotor dimensions
Since the gearmotor’s output shaft is nylon, there may be small variances in the diameter from unit to unit. These variations might cause press-suit attachments like our 14 mm wheel to match loosely in some instances. In the event that you experience a loose fitting, you could attempt swapping tires or using a small dab of glue to greatly help hold the wheel on.