I'm interested to learn the definition of a pocket and a wristwatch mainspring, in terms of dimensions.
1) What is the general height range for a wrist watch mainspring? Eg. 1mm to 2mm
2) What is the general diameter range for a wrist watch mainspring? Eg. 7mm to 12mm
3) What is the general height range for a pocket watch mainspring?
4) What is the general diameter range for a pocket watch mainspring?
5) Is the mainspring eye/hole size generally half the height of the mainspring?
Reason: I'm looking to classify them correctly for improving the rs winder project releases.
Will appreciate any help.
Forgive me if this is a dumb question. I'm currently working on an AS 1187 1194 movement which has a broken mainspring. I have a bunch of NOS mainsprings and would prefer to use one of possible. After looking into it, it seems the proper mainspring size for this movement is Denn. 6 x 11 -- 11.5
I've got ones close to that but not exactly that. So my question is, is it possible to use a mainspring with a slightly different width, strength, or length?
Is there more wiggle room in regards to any measurements in particular? (by that I mean, maybe there is no wiggle room in width but some wiggle room in strength etc)
I've attached some photos with ones that seem to be relatively close, and am wondering your thoughts on using any of them? This is for a personal project so I'm looking to spend as little money as possible, otherwise I would buy a new mainsprings from Jules Borel.
Thank you for any help you can give!
I'm trying to figure out how to reassemble this mainspring the mouvement is Felsa 4017N . I join photo
As you can see the arbor seems to be sealed on the wheel I tried to free him but there are some dents that prevent this. It seems to be one piece.
I've replaced replace the spring into the barrel but can't place the arbor in place ???⁉️
Thanks for your suggestions
I recently acquired an Illinois pocket watch that appears to have a screw on front and back. I was able to unscrew the front with great effort. A lot of dirt and grime dropped out. I need to get the back off. There are no grab points so, I have tried a rubber ball and failed. If it was a bolt, I would use heat, but that’s not an option. I am afraid to use penetrating oil for fear of damaging the porcelain face. I am assuming that the watch is in the 100 year old range but won’t know until I get the serial number off the movement.
it is clear, the case has not been opened in a very long time.
What is the best way to open it?
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