In airsoft, gearbox is a mechanical system that is responsible for transmitting and transforming the speed and torque of the rotary motion of an electric motor, the piston system for a reply. The motor circuit is driven by the trigger (1). The engine is connected to a series of gears that these alter the movement and finally transmit it to the piston (9), compressing the spring (8). When the piston reaches the end of their journey, (the spring is fully compressed) the gearbox stops exerting force on it because I run out of gear wheel semidented (5) that moves, causing the release of stored energy by the spring. At this time the piston moves towards its initial position inside the cylinder (10), pushing all the air accumulated inside it, causing the expulsion of the ball. In addition to compress the spring, the gearbox moves the nozzle (12) (the output of the cylinder where it exits the air to throw the balls) by a tappet Plate (6), to introduce a new ball in the chamber with each shot. If the replica has semiautomatic and automatic mode, the switch position allows the motor to rotate an unlimited number of times if you are in automatic mode (until you release the trigger), or one full turn if you are in semiautomatic mode. You can see the difference in the second video. You may find you with different types of gearbox: they are appointed for Type I, Type II, Type III ect. The biggest difference between different gearbox is its external form, which changes the internal layout of components, as they should adapt to the reply in which they are installed (the form of a P90 is far from an M4 for example, and use gearbox design one would be almost impossible.) When talking about metal gearbox concerns that the gears are metal. The bearings of cheap Chinese replicas, although the gearbox is metal, are plastic. When performing an upgrade is necessary to replace them with metal or ceramic. is very interesting and I was helpful thank you very much all your information ... I have a Cyma mp5 ... 023. this I believe the gearbox is plastic ... you can really replace a metal one??.

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