I think I'm imagining it, but can a screw-in crown work its way loose again?

I've noticed after a few wears, the crown on my C65 chrono needs tightening. I'm happy to live with it like that and just get into the habit of checking now and then (I take it off even to do the washing up!) but wondered if anyone else has found something similar.

Here's a pic of mine...

It probably can. I would expect that if your wrist is in contact with the crown, some movement is possible. Screws can and do work loose, that's why people use thread lock - though not on your crown!

exHowfener wrote: ↑Thu May 25, 2023 1:06 pm It probably can. I would expect that if your wrist is in contact with the crown, some movement is possible. Screws can and do work loose, that's why people use thread lock - though not on your crown!

And it must be possible for casual crown/wrist movement to do the opposite and actually tighten the crown.

It might be possible, but I've never experienced it myself. Not even with my C65 Chronograph.

Apparently there’s this thing in car maintenance or building houses called tightening something ‘finger tight’. Or so they tell me anyway. Us girls never got taught this at school. So all I can say is that when I tighten a screw down crown I tighten it so hard that I can’t unscrew it next time. Us girls missed out on a lot at school. I think football, cars and golf has more to do with genetics
Happy to help

I have heard of it in diving circles especially if you are wearing gloves and doing work. I don't recall ever hearing about it under normal diving conditions. Most divers I know check the crown a lot from habit. They give it a twist after putting it on in the morning and again before getting in the water.

missF wrote: ↑Thu May 25, 2023 4:29 pm Apparently there’s this thing in car maintenance or building houses called tightening something ‘finger tight’. Or so they tell me anyway. Us girls never got taught this at school. So all I can say is that when I tighten a screw down crown I tighten it so hard that I can’t unscrew it next time. Us girls missed out on a lot at school. I think football, cars and golf has more to do with genetics
Happy to help

Winning answer!

missF wrote: ↑Thu May 25, 2023 4:29 pm Apparently there’s this thing in car maintenance or building houses called tightening something ‘finger tight’. Or so they tell me anyway. Us girls never got taught this at school. So all I can say is that when I tighten a screw down crown I tighten it so hard that I can’t unscrew it next time. Us girls missed out on a lot at school. I think football, cars and golf has more to do with genetics
Happy to help

The only exercise, I do regularly, is with hand Grippers, I'm the only one in my household who can open the stopper of a hot water bottle.
So I'd like to think my exercise regime, means my finger tightness threshold is of a superior nature.
Although it can lead to heavy handedness, another unquantifiable force.

Regards Steve

missF wrote: ↑Thu May 25, 2023 4:29 pm Apparently there’s this thing in car maintenance or building houses called tightening something ‘finger tight’. Or so they tell me anyway. Us girls never got taught this at school. So all I can say is that when I tighten a screw down crown I tighten it so hard that I can’t unscrew it next time. Us girls missed out on a lot at school. I think football, cars and golf has more to do with genetics
Happy to help

You missed out on football and golf? Wow! That's a result!!

magicman wrote: ↑Thu May 25, 2023 5:13 pm

The only exercise, I do regularly, is with hand Grippers, I'm the only one in my household who can open the stopper of a hot water bottle.
So I'd like to think my exercise regime, means my finger tightness threshold is of a superior nature.
Although it can lead to heavy handedness, another unquantifiable force.

Regards Steve

I think that, philosophically at least, inability to unstopper the hottie is akin to being unable to screw caps back onto jars of chutney/jam/mustard/etc more than one eighth of a turn: you know, that "get you partway across the room before coming apart phenomenon.

missF wrote: ↑Thu May 25, 2023 4:29 pm Apparently there’s this thing in car maintenance or building houses called tightening something ‘finger tight’. Or so they tell me anyway. Us girls never got taught this at school. So all I can say is that when I tighten a screw down crown I tighten it so hard that I can’t unscrew it next time. Us girls missed out on a lot at school. I think football, cars and golf has more to do with genetics
Happy to help

My wife is four years older than me. When she attended middle school (grades 6-8), two years of shop class was boys only, and girls took home economics class (cooking, sewing, health) for three years. Boys had the option to take shop or health for the third year. My wife even petitioned to get one year of shop but was turned down.

My middle school - granted it was a different US state so regulations and requirements vary - when I went through only four years later, mandated everyone took a year of home econ, and everyone took a year of shop (upgraded to Industrial Arts). The third year was optional home ec, IA, or an additional fine arts/music/theater. Golf and auto mechanics were high school classes. Since I was on the “college track” in high school, no auto mechanics class for me, though I’m certain I could have done it, too, with my course load. Golf was a fave of my father and grandfather. I don’t care for it.

As for threaded crowns, I’ve heard of it happening but in thirty plus years of wearing watches with them I’ve not had one unscrew. (My earlier years of digital watches obviously don’t count.)

Ofcourse, all you need is the same conditions that normally allow you to unscrew the crown but sans the intention.

I purchased my first watch with a screw-down crown in 1996 (an Omega Seamaster Pro 300), but I have never experienced a screw-down crown working loose on its' own. I am sure it happens occasionally, but fortunately it has not happened to me.

Yes it can, especially if not screwed down tight enough. Torque it down a bit harder than you usually do, and see what happens...