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Technical data
| Attributes | |
| ARTICLE | L1212013 |
| SIZE L/W/H | overall height 67 mm |
| NOTES | tooth height 4.2 mm |
overall height 67 mm
tooth height 4.2 mm
A gear drives the grinding mechanism in professional espresso machines, translating motor power into precise rotation of the burrs. The teeth mesh with a matching gear on the motor shaft, stepping down speed while increasing torque so the burrs turn at the exact rate needed for consistent grind size. Each tooth's profile and height determine how smoothly the gears engage and how much force they transmit without slipping or wearing prematurely.
To install, the operator removes the machine's side panel or hopper assembly, locates the worn gear on the motor shaft, and aligns the new gear's central bore with the shaft. The gear is pressed or slid into place, ensuring the teeth mesh fully with the adjacent gear. Once seated, the panel or hopper is refitted, and the machine is tested for smooth rotation before grinding resumes.
The gear is formed from a single piece of material, with 108 teeth cut to a height of 4.2 mm. The overall height of the gear is 67 mm, which sets the spacing between the motor and the grinding assembly. This dimension ensures the teeth engage at the correct depth and the gear does not bind against adjacent parts.
The gear fits specific models of Gaggia, Krups, Saeco and Spidem espresso machines, replacing the original part in the grinding mechanism. It is listed under spare parts for coffee equipment in the professional catering catalogue.