# Vibrations per hour explained: what 28,800 vph means and why the seconds hand steps more or less finely

**URL:** <https://superreps.net/t/halbschwingungen-pro-stunde-erklart-was-28-800-a-h-bedeuten-und-warum-der-sekundenzeiger-unterschiedlich-fein-springt/31727>\
**Category:** Movements & Tech\
**Tags:** question\
**Created:** [November 4, 2026, 10:23am UTC](https://superreps.net/t/halbschwingungen-pro-stunde-erklart-was-28-800-a-h-bedeuten-und-warum-der-sekundenzeiger-unterschiedlich-fein-springt/31727 "2026-11-04T10:23:48Z")\
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**Author:** ![uhrenfuchs](https://superreps.net/user_avatar/superreps.net/uhrenfuchs/32/275_2.png) [@uhrenfuchs](https://superreps.net/u/uhrenfuchs)\
**Post date:** [November 4, 2026, 10:24am UTC](https://superreps.net/t/halbschwingungen-pro-stunde-erklart-was-28-800-a-h-bedeuten-und-warum-der-sekundenzeiger-unterschiedlich-fein-springt/31727/4 "2026-11-04T10:24:42Z")

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It looks smooth, but it moves in small steps. On a typical movement with central seconds it makes one small step per vibration:

- 28,800 vph: 8 steps per second
- 21,600 vph: 6 steps per second
- 36,000 vph: 10 steps per second  
The more steps, the finer the motion looks. A quartz movement, by contrast, usually jumps only once per second. An example at 5 Hz is calibre 7135 from the [Land-Dweller thread](https://superreps.net/t/land-dweller-calibre-7135-dynapulse-5-hz-what-photos-show/31705).

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