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The Encyclopedia of Horology

Component record · Keyless work

Barrel Bridge

Partially verified

Large bridge covering the mainspring

What it does

Supports the barrel and winding wheels

How it works

Evolution

Standard in bridge-plate movements

Known variations

    Identification for collectors

      Common failure modes

      • Barrel arbor wear

      Diagram

      coiled mainspring inside the barrelbarrel teeth driving the trainarbor and hook
      Schematic: mainspring and barrel. An outline schematic drawn to show the arrangement of the parts discussed here. It is not a dimensioned working drawing and does not depict a particular maker's calibre.

      Sources & references

      1. de Carle, D., Practical Watch Repairing
      2. de Carle, D., Watch and Clock Encyclopedia
      3. Daniels, G., Watchmaking

      Where sources disagree, the disagreement is stated rather than resolved silently.