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Relationship between escape-wheel, pallet-fork and daily rate ?

Endeavor
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Endeavor Distinguished Member

Endeavor

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Hello All;

Is there a relation between the escapewheel, the pallet-fork and the daily rate?

A barely running 1950's pocket-watch needed a full service. Sadly, I managed to snap a pallet-fork pivot. I had two "identical" donors movements.

I tried the pallet-forks of the donors but I ended up swapping a complete matching set; escape-wheel and pallet fork. That worked very well.

The movement shows healty horizontal amplitudes of 270-280 and in vertical positions 230-240, with 18.000 BPH (according to the Weishi 1000)

However, it runs very fast. Even with the regulator adjusted to maximum slow, it still runs too fast.

The movement looked untouched, all the timing-screws are present and the hairspring-stud is fixed (i.e.: the hair-spring can not be altered in length). The balance wheel + hairspring looks untouched and original.

Has the watch "always" ran too fast or is there a connection between the balance-wheel daily rate and me changing a the pallet-fork + escapewheel?

I was under the impression that the timing was a combination of the weight of the balance-wheel (timing screws) and a correctly vibrated hairspring?

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