The Cylindrical Pivot and Jewel

The cylindrical pivot (1) has the advantage of simplicity, robustness, and low cost. The friction of the cylindrical pivot is relatively high compared to the two-jewel arrangement used with the conical pivot . This friction results from the relatively thick jewel hole (2) and the pivot shoulder rubbing on the backside of the jewel (3) on the lower pivot (depending on the position of the watch).

The cylindrical pivot is used for the mainspring barrel and gear train of the watch. The balance wheel usually uses a conical pivot, as does the escape wheel in many finer watches.

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