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January 06, 2015

Comments

Gary

I've read elsewhere that you should turn the crown counterclockwise for the threads to catch before turning it clockwise to tighten it. This a applies to machine screws in general, not just screw-down crowns. It's to keep from cross threading and damaging the threads.

herculodge

I don't think I know how to do it? So I'm pushing while turning counterclockwise and then I eventually turn clockwise to tighten. Is that it? Perhaps I need a video demonstration.

jonnybardo

I dabbled with my Black Monster and while you can catch the threads by pushing in and then going clockwise to tighten, it works better if you push in slightly, go just a bit counter-clockwise to get a slight click sound, and then clockwise to tighten. I'm thinking that even when doing the former there must be a slight turn counter-clockwise, because otherwise it is hard to catch the threads. Maybe just pushing in eventually ruins the threads.

herculodge

Mike at Watch City affirmed everything Gary said. He does the counterclockwise rotation before tightening any watch.

Gary

I only have one watch with a screw-down crown: a Citizen BN0100-00E diver. It has a spring holding the crown out when it's unscrewed. I just tested it. I unscrewed it, then while pushing in gently while rotating the crown counterclockwise I eventually feel a little click, then I tighten the crown clockwise. The trick is to keep gentle pressure on the crown both while rotating counterclockwise and while initially tightening clockwise, in order to take out the gap created by the spring until the threads mesh. I hope this makes sense.

Angelo

yes----if you think about it, almost any screw you turn in should be turned the opposite way first, even if just barely----to catch the threads. Then you can screw in smoothly. I honestly don't know if I remember to do that with my watches with screw down crowns----but from now on, I will. I totally get how this prevents cross threading, which will strip the threads.

Gary

Jeff,

Did this discussion resolve your problem with screw-down crowns?

herculodge

Gary, I have been getting used to the process and feel more confident about it now. Thanks. Jeff

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