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 possess any mounting holes, but its compact size makes it easy to fasten with tape or glue. On the other hand, since this gearmotor is certainly almost the same size as a 1/4″ fuse, it can 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 result shaft, which is 2 mm in diameter with a section that’s flattened by 0.5 mm. The “D” part of the shaft is certainly 2.5 mm long. The engine actions 6 mm in diameter and 9 mm long, and the gearbox length, labeled “L” in the diagram below, depends on the gear ratio. The 26:1 gearbox can be 7.1 mm long, as the 136:1 option procedures 9.4 mm. The electric motor leads come with their ideas pre-stripped and extend approximately 2 cm (0.8″) from the back of the motor.
Micro Planetary Gear Motor Because the gearmotor’s output shaft is nylon, there may be small variances in the diameter from unit to unit. These variations might cause press-match 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 small dab of glue to greatly help hold the wheel on.