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The Encyclopedia of Horology

Component record · Regulation

Hairspring Stud Holder

Partially verified

Bracket for hairspring end

What it does

Anchors the outer end of the hairspring

How it works

Evolution

Mobile holders allow beat adjustment

Known variations

    Identification for collectors

      Common failure modes

      • Loose screw

      Diagram

      balance wheel with timing screwsflat or overcoil hairspringregulator index
      Schematic: balance, hairspring and regulator. 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.