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Screw balance

A screw balance is a balance wheel that has adjustable regulation screws and tiny washers along its rim.

These screws previously performed the following functions

  • A possibly existent unbalance of the balance can be compensated by the screws.
  • The oscillation frequency of the balance can be changed.

Both measures are intended to improve the accuracy of the watch.

Screw balances can be found only in high-grade watch movements. This applies to the past and the present. From today's perspective a screw balance brings no more advantages due to extremely low production tolerances with usual balances. However, some watch movements are still manufactured with screw balances, as they are a feature of high-quality watch movements, and also nice to look at.

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screw_balance.txt · Last modified: 11.10.2021 17:01 (external edit)

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