On my very first use the Main Engaging Gear went free. Model JMD LEGENDSerial No: 611537.Me being a Design Engineer, can easily make out, that at least the Main gear needs Some Positive Engagement with the Motor Shaft. The Motor Shaft and the Top gear shaft are both Cylindrical, So while rotating the Jar is loaded the top gear slips.
They need to incorporate a Flat Step in the motor shaft and an equivalent step in the Gear Cylinder, in order to have a positive engagement. I sincerely hope that my comment is read and some effort is put to rectify this blunder.I have given my machine to the service center, hopefully I get the replacement soon.
The Product also has some other flaws in the Juicer part. The rotating disk (seev) is push fit, self locking. There also it can be converted to a positive lock type.NOTE:A gear-type shaft coupling for connecting shafts in an end-to-end relation, in which there are two hubs mounted on the ends of the shafts and sleeves disposed on the hubs and having internal gearing for meshing with external gearing on the hubs.
A ring overlaps and connects the two sleeves to form a rigid assembly for transmitting torque between the gear teeth of one hub and the gear teeth of the other hub. Bolts or screws extending radially connect the ring and the sleeves and, in several embodiments of the invention, the ring is segmented to permit the ring to be easily assembled in the coupling as the coupling is installed on the drive and driven machinery.