3D Printed Rising Sun Mainspring Winder 

Thanks. You can 3D print this yourself, please visit the project page. The link is in the description.

@@watchmakerdetective7793 I know thanks, the problem is that I don't know anything about 3D printing, and I don't know about that kind of service in my city, but I'll try to find someone to print it for me.

Please head to the release area download the latest release. I have added a 11.8mm bowl. Also, I added teeth to plunger for better plunging action, it works even better than before.

Just to update that it does work, after updating the design (I took some liberties in designing the parts, which turned out to be problematic).

​@@Jedimaster36091 Good to know! If it isn't latching on, that means that your stapler pin is too thick. You should find a thinner one, or just use a metal file to reduce the thickness.

@@watchmakerdetective7793 In order to make it latch I had to distort the mainspring at the hook end; basically I had to make the loop significantly wider than the winder base arbor. But that kind of distortion is dangerous as the mainspring can break. I am now trying with another mainspring, which is tight on the arbor (2.5 mm). No pin, no matter how small, would fit in between the arbor and the mainspring.

Could you please expand a bit? From the video it seems it works fine.

@@Jedimaster36091 I didn't say it doesn't work fine. I said incomplete design. First of all, mainspring would be fly if you release one of your finger. This type of springs has similar height. So, you won't deal with fine wire height adjustment if the anchor printed with the pin. And it will be good to add a notch to the inner corner of the winding mouth to prevent it from coming out. Finally, you can put the mainspring directly without open it if the location of the barrel guard is under the pin. How is it now?

@@erzincanli I am sorry, but couldn't understand some of the ideas. Anyway, I printed a set for the watch I am working on, and my first try failed to hook the pin to the mainspring hole, even after many attempts. I am afraid to widen the mainspring loop more than it is, so it doesn't break.

​@@Jedimaster36091 I think he means to say "imperfect". As you can see in the video/WRT forums, the design is functional (ie. complete). Also, I prefer to keep the design simple, so that it is easy on the printer. Feel free to update the design and share them on the WRT/Github issues page, so I may include them in a future release if it makes sense to do so.