The micro plastic gearmotor’s output shaft works with with our 14 mm wheels. We do not have any brackets because of this gearmotor, and it generally does not possess any mounting holes, but its small 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 could be mounted using regular 1/4″ (6 mm) fuse clips.
The next 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 is flattened by 0.5 mm. The “D” part of the shaft is 2.5 mm long. The motor measures 6 mm in diameter and 9 mm in length, and the gearbox size, labeled “L” in the diagram below, depends upon the gear ratio. The 26:1 gearbox is 7.1 mm long, while the 136:1 option actions 9.4 mm. The engine leads come with their suggestions pre-stripped and extend around 2 cm (0.8″) from the back of the motor.
Because the gearmotor’s output shaft is nylon, there may be small variances in the diameter from unit to unit. These Micro Planetary Gear Motor variations may 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 little dab of glue to greatly help hold the wheel on.