AEG Gearbox Components and What They Do

An AEG gearbox converts electrical energy from the battery and motor into a repeated compression cycle. Understanding each group of parts makes troubleshooting easier, but the exact layout varies by gearbox version and electronic system.

The bevel, spur and sector gears form the mechanical reduction stage in a typical AEG gear train.

Mechanical drive

The motor pinion drives the bevel gear, followed by the spur and sector gears. The sector gear engages the piston and also coordinates tappet-plate movement. Bushings or bearings support the gear shafts; shims set axial position.

Compression and feeding

The piston and piston head move in the cylinder. The cylinder head and nozzle form the forward air path, while the tappet plate moves the nozzle during loading. Fit, stroke, sealing and timing must be checked as a system.

Control and safety parts

The trigger system or ETU controls the electrical cycle. The cutoff mechanism supports semi-auto operation in applicable mechanical designs, and the anti-reversal latch limits reverse gear movement. Disconnect the battery before opening the gearbox.

For replacement gears, review JVAN gear-set options after confirming the gearbox and build requirements.