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 generally does not possess any mounting holes, but its compact size makes it easy to fasten with tape or glue. Additionally, since this Micro Planetary Gear Motor gearmotor is definitely 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 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 can be 2.5 mm long. The engine measures 6 mm in diameter and 9 mm in length, and the gearbox size, labeled “L” in the diagram below, depends on the gear ratio. The 26:1 gearbox is 7.1 mm long, as the 
136:1 option procedures 9.4 mm. The engine leads include their tips pre-stripped and extend around 2 cm (0.8″) from the back of the motor.
Gearmotor dimensions
Since the gearmotor’s output shaft is nylon, there can be small variances in the diameter from unit to unit. These variations may cause press-suit attachments like our 14 mm wheel to fit loosely in some instances. If you experience a loose fitting, you could attempt swapping wheels or using a small dab of glue to greatly help hold the wheel on.