Jump to content

Snapped date and time stem - Rotary


AndyT

Recommended Posts

Hi,

Thanks again and its nice to be here. 

I've managed to snap the stem on my date and time adjuster on my Rotary Chronospeed. Its not expensive, more sentimental. 

GS03351 /19 (12881)

Could anyone post a link to replacement? 

Thank you so much for any help 

20210117_122705.jpg

20210117_122638.jpg

Link to comment
Share on other sites

The case reference is not important, you need to look at the identification on the quartz module. For the best results I recommend you give it to a watch shop, it should not be an expensive repair. 

  • Thanks 1
Link to comment
Share on other sites

I may need to correct myself. For an easy repair the crown stem must be of the threaded type and the repairer able to remove the stump from the crown - but I can't see enough about this in your picture. There are good techniques to do that, but if he won't  be able to, he will want to replace the crown as well, which being of the screw on type may be difficult or impossible to find  identical to the original. You might even hear about the claimed need  to replace the pendant tube as well, and be given an estimate higher than the material value of the watch. Good luck.

Link to comment
Share on other sites

Hi  For your information   the whole  Miyota OS20  movement costs £15 from Cousins, they usually come with a stem attached. All you need is to recover the crown. If the crown is brass this can be done by dissolving the broken steel stub in a solution of ALUM which will eat the steel but not the brass.

  • Thanks 1
Link to comment
Share on other sites

20 minutes ago, watchweasol said:

Hi  For your information   the whole  Miyota OS20  movement costs £15 from Cousins, they usually come with a stem attached. All you need is to recover the crown. If the crown is brass this can be done by dissolving the broken steel stub in a solution of ALUM which will eat the steel but not the brass.

I have seen "alum" mentioned several times for this purpose.  My googling yields several types (potassium, ammonium). Which kind do you use?

  • Thanks 1
Link to comment
Share on other sites

Thanks everyone 

 

I've managed to remove the broken stem from the crown and also released the snapped stem from the watch internal.

I've picked up a new stem for £5 and job sorted. 

 

You guys are awesome ? 

Link to comment
Share on other sites

27 minutes ago, AndyT said:

I've managed to remove the broken stem from the crown and also released the snapped stem from the watch internal.
I've picked up a new stem for £5 and job sorted. 

Very good. Because of the screw in crown measuring the stem before cutting is a bit more complicated. If you will want, ask here when you're ready and I'll tell you my method. I also recommend that you use a mild locking agent on the crown.

  • Thanks 1
Link to comment
Share on other sites

44 minutes ago, AndyT said:

Oh no! I thought it was just a straight forward stem replacement.  I had no idea that it had to be cut! 
Is the crown end that needs cutting ? 

That's why I was recommending you bring the watch to a repair shop. One that is totally new to watch repair can't know how things a correct and doesn't have the correct tools.

However since no recommendation can prevent people from doing whatever they want to their property, here a relevant video by our Host Mark Lovick. Note that doesn't cover the extra measuring steps needed with a screw in crown.

 

Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I wonder whats inside, bought it blindly, not cheap at all.
    • Here's a quick Gif I made to show truing the balance using callipers. This has such a slight wobble, but is within acceptable parameters. The important thing is the balance doesn't touch or rub anything when in operation. This is an Eterna Tank. Here's a pic of the balance freshly rivetted with a new staff in the movement
    • I just poked an inflation calculator, and $5 in 2020 would be about $6 in 2024. Doesn't fit very neatly into any status codes, which stop at 5XX, but that's honestly somewhat arbitrary outside of a clever pun for those that dabble in such things. Back during the pandemic, I would spend a good chunk of idle time in the evenings scanning through hundreds of listings a night, and I would only land 1-2 a week max. I would often go months without finding something suitable. A very small percentage of the watches in the price range are worth pulling the trigger on for my purposes. The number floating through the thread here may be somewhat deceptive.
    • Hi, guys I got there in the end after several attempts using a screwdriver and Rodico, I couldn't wait for the tool to arrive and was getting pretty confident handling the stud screw without it flying away. At first, I was using far too much Rodico, and then realized you only need the smallest amount inside the screw slot. Putting the cock back onto the movement also helped as it gave me more to hold onto while my shaky hand tried to align the screw wobbling away at the end of the screwdriver😁 Anyway, job done and I can move on. Thanks again for all the advice it's really appreciated for a beginner. 
    • I'd be interested in a copy of this book if anyone has one they'd like to sell  
×
×
  • Create New...