What is the calculation for bph, given the ticks per second?
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Jojo
Casual watch enthusiast. Loves Seiko and Casio. Also loves watching watch restoration videos for some reason.
Member since
Last active: 1 month ago
Ticks per second multiplied by 3600 yields bph.
Hz. Vibrations per hour is:
4hz = 8 "tics" a second = 28,800 bph -or-
3hz = 6 "tics" a second = 21,600 bph
Usually the 2 most frequent caliber hz. But there are others like high frequency calibers that go 10 or more "tics" per second (e.g. Grand Seiko Hi-beat at 36,000 bph).
The pallet fork goes forward and back on each cycle. Both motions advance the movement. Your “missing” factor is because there are two of these “vibrations” per cycle of the escapement.
A question I never imagined in over 50 years of collecting.
Are you a hobbyist or a technician?
This would be a good read-
https://www.watchtime.com/reference-center/glossary/vibration-vph/
https://www.hodinkee.com/articles/watchs-frequency-hz-vph-meaning
2.5hz is 18000 vph
3hz is 21600 vph
3.5hz is 25200 vph
4hz 28800 vph
5hz is 36000 vph
6hz is 43200 vph
Multiply the Hz rating by 7,200 to get vibrations per hour, or Divide the vibrations per hour by 7,200 to get Hz