broken crowns stems and tubes

[mitchbaria]

There's only one movement I'm aware of that had a problem with broken stems and it was isolated to that particular movement aside from this I've never heard of broken stems. I think the op was talking generally about people winding their watches to rough could result in broken stems. This is simply fantasy as winding a watch should never, EVER result in a broken stem.

 

[davylloyd]

Your welcome , you shouldn't ever consider this while handling your watch, however a major concern that is stem related for every rep owner is the proper way to engage the stem without dislodging the little clutch which is a major issue and one that happens very often. I don't know the correct term for this but just a word of warning about removing stems, it is very easy to take one out but can be very tricky to get it back in without causing damage to your movement so think twice before pulling a stem.

Ay caramba!

I've just managed my first successful repair of a keyless works. I'm really careful when removing and replacing stems, but this one caught me out.:jelly:

 

[mitchbaria]

Keyless, is that what it's called? Funny I've never known that..

 

[cybee]

Check to see if the movement is aligned with the hole in the tube . If the movement is too high , too low or off center it can place lateral loads on the stem that can snap the stem.

Good answer and rep makers don't always pay attention to that sort of detail along with bad threading of tubes and stems cut to improper lengths. Very spotty QC on those issues with reps.