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The Encyclopedia of Horology

Component record · Plates & finishing

Jewel Bushing

Partially verified

Brass sleeve for jewel

What it does

Adapts jewel to large hole

How it works

Evolution

Repair technique or design choice

Known variations

    Identification for collectors

      Common failure modes

      • Loose fit

      Diagram

      cap jewel (endstone)bridgeplatepivot running in a hole jewel
      Schematic: jewelled bearing at a pivot. 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.