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Stem Removal on Sellita SW200-1

SunglassGuy

By SunglassGuy
in Watch Repairs Help & Advice

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SunglassGuy New Member

SunglassGuy

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Trying my first watch build and cant figure out how to release the stem on a Sellita SW200-1 movement.  Reference material from Sellita shows a diagram of a bridge cutout and a part, I believe was the setting lever but am not sure of the correct way to remove the stem.  Any help would be appreciated

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Nucejoe Distinguished Member

Nucejoe

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Use the largest tip screw driver which gets in the oval hole. The tip is be wider than diametet of release button and enters cross to the STEM AXIS, a shoulder is provided inside the hole to stop the screwdriver tip from insertion deeper in. Pushed in down to the shoulder which is enough to leave the stem free to be taken out. If not clear let m know to hand draw you a sketch showing what I say.

Regqrds joe

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Nucejoe Distinguished Member

Nucejoe

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Yes, thanks to OH , the picture shows the push button. 

The hole as viewed from top is not circulare but parabollic.

The screwdriver blade should be wider than diameter of  the button, so not to enter the button hole, rather enter the parobollic hole only and go down as far as the parrabolla hole provides depth,  the shoulder inside keeps the screwdriver from entering button hole only if the screwdriver blade is wider than button hole.

 

IMG_20181021_112109.jpg

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  • 2 weeks later...
SteveT Watch Enthusiast

SteveT

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Sorry to post a n00b question, but it's somewhat related...

After you put the hands back on the watch how do you remove the stem (in order to put it in the case)? Is it ok to put the face down on the Movement Cushion Pad, I'm worried that doing that may bend the hands or something?

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Nucejoe Distinguished Member

Nucejoe

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You risk damaging the dial plate too. Dial should not be subjected to any stress.

If your movement holder blocks access to the back of the movement , perhaps tranferring the movement on another holder which allows such access is considerable.

I have managed sliding  the movement in the case at oblique angle,  with crown removed from the stem. Once movement is in place in the case, remove the stem to tighten the crown back on stem and reinsert in the movement. Easier done than said.

Picture of the predicament you got in helps. 

Regards joe

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    • Neverenoughwatches
      Stem removal after fitting hands

      By Neverenoughwatches · Posted

      That's the right technique Mal 👍 If you are ok with a loupe ( which I'm not ) then pick up the dial in your left hand and make a tripod holder out of 3 fingers and then exactly how Mal and me described with your right hand, press and flick out the stem at the same time. You need three fingers to do this, i use my ring ring finger , sounds like mal uses his little finger, just whatever you feel comfortable with. The key point and dangerous side to this is the tweezers or driver slipping off the release screw. Stablise your left arm by resting your elbow on your bench, so that you can hold the movement horizontally flat, use a x5 loupe to view  and good light so you can see well and have a good tight fitting screwdriver to push the release down. Or as suggested a pusher mounted solid upside-down somewhere then all you need to do is push your movement up to it. I'll rig something up in a bit to show you what i mean. Something like this, but tbh its better to just learn to do with your fingers.
    • Neverenoughwatches
      Leaving the forum for a while.

      By Neverenoughwatches · Posted

      Thanks Michael, shes a real soldier, it would take a tank to knock her off her feet.  Shes surprised even me and i knew she was a tough cookie.  Good for you Michael, you keep at it. I've been reading your posts re. your watchroom they're inspiring and it doesn't matter how long it takes you to get there its about the journey. Rome wasn't built in a day, our watchcaves are our solitudes, our own little empires where we can shut ourselves away from the crap that goes on around us in the world. I look forward to seeing you progress, I have my own ideas how i like to do things. But in answer to your questions on that thread, just let your workspace evolve around you and how you work. You wont figure it out straight away but you will know when to change it and when to leave it alone. But most of all just enjoy it.
    • Malocchio
      Stem removal after fitting hands

      By Malocchio · Posted

      That can be tricky. Sometimes I hold the movement from the edges in left hand and with right hand I push the release with tweezers and simultaneously pull the stem out with right hand pinky or something. 
    • PeterS
      Stem removal after fitting hands

      By PeterS · Posted

      I see what you mean. I must admit I’m not entirely comfortable with that but I can’t see a better method than what you suggest. I’d like to see something like this mirror with a short spike: https://www.cousinsuk.com/product/mirror-for-observing-movements Place it on, push the spike on the post with one hand and release the stem with the other hand. Minor problem, it doesn’t exist.
    • Michael1962
      Leaving the forum for a while.

      By Michael1962 · Posted

      Hope you mum keeps on mending. I was adamant that I was going to get myself going after my stroke. I was only 52. I still have a lot of life left to live. Some people give up. Some people don't let it beat them. Your mum sounds like one of the winners. 👍
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