The effect of a direct hit on a watch crown?

Jan 31, 2023,06:32 AM

Question to the experts:

What should be the effect of a direct hit (when wearing) on the crown (beside the visual)? does it cause a damage in the movement?

what if the watch has screw-in crown? as I understand, it should be locked in its place by the threads.

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No expert at all

 By: dedestexhes : January 31st, 2023-06:44
I would assume a hit on the crown, regardless of what damage is done via the crown, is also a hit for the complete watch. So damage to the movement would be possible depending on the force of the hit. Dirk

I understand that

 By: MilDiver : January 31st, 2023-10:44
But the question was about a hit coming from the crown through the stem.

Not really.

 By: MilDiver : January 31st, 2023-10:43
But I found, more than once, that service centers use "crown got knocked" as an excuse to avoid repair under warranty. trying to learn more on the subject.

Thank you, now I understand why…

 By: Cpt Scarlet : January 31st, 2023-12:19
I recommend that you take a look at this link as it explains the Rolex Submariner in some detail that you should find interesting:

Impact forces concentrate on a point rather than a curve

 By: cazalea : January 31st, 2023-16:19
So because the side of most cases is curved, a blow can slide off (a "glancing blow") and not have much force transferred. But the crown is a point, and any force (hitting doorframe possibly, or a wall, or drop on the floor) can be concentrated on the cro...  

Thank You

 By: jim_94104 : January 31st, 2023-16:29
for this informative feedback. I guess the devil is always in the details 😅

Thank you Cazalea, for this great feedback.

 By: MilDiver : February 1st, 2023-04:34
and details, and for being supportive for the people on duty! The detailed explanation definitely gives a perspective and idea's. One question that I'm not sure about: If I use a screw down case, and the crown is screwed in properly, wouldn't that "bayone... 

Hi, I have thought a lot about your question

 By: cazalea : February 1st, 2023-22:07
I'm not a physicist, so I can't verify my hunch with analytical calculations ... having said that I can tell you that "kinetic energy has to go somewhere" when you drop a watch, or bang it on the doorframe. Let's analyze this logically - the crown is usua...