Hi again all,
since there are some really knowledgeable people here I hope you can impart some wisdom regarding repairing a bent hair spring. after getting this old movement working again with the help of this group (new mainspring), I need a little more advice.
after hooking this beaut up to watch-a-scope it shows low amplitude and very erratic trace. I can see the hairspring is bent and need to start here in addressing the issue.
What tools are needed (not willing to spend £50 on hairspring levers at the moment)? I have basic tools (enough to service a movement), but what are the essentials for working on a hairspring? i.e for removing from a balance safely what tweezers types/sizes are recommended for correction etc.
Also, is there an easy way to identify and obtain replacement hairsprings? I assume they are very interchangeable as it would not have been easy to make new hairsprings for every watch model.
Question for those who work on Vintage Timex watches:
I've restored several Timex pieces from the late '60s to the late '70s. The technique I learned (from Internet posts and tutorials) say to simply loosen the dial-side balance pivot by unscrewing it 1/2 turn prior to cleaning the entire movement in an ultrasonic cleaner. This method contradicts the official Timex service manuals, which state that the balance should be removed, cleaned separately and reinstalled. Thus preventing the hairspring form being damaged in the ultrasonic cleaner.
My experience is this:
Leaving the balance in place (slightly loosened) is much easier and will work on the standard movements used in the '70s (M24/25, M32/33, M104, etc.)
Attempting the same method on movements from the '50s and '60s (M22, M29, etc) will result in a kinked hairspring that is damn near impossible to un-kink.
So my question is this:
What do you experienced Timex restoration experts recommend? Leave the balance/hairspring in the movement for cleaning, or take it out to soak in a separate jar?
Is the potential for hairspring damage greater when removing/reinstalling the balance - in comparison to leaving it in place?
I've messed up a couple of vintage movements that I really wish I hadn't. I don't want to make those mistakes again.
Thanks for any insights!
I recently had the pleasure of finding a damaged hairspring needing care. My first! It’s an inexpensive orient watch, gaining 20 minutes a day. I am taking Mark’s fault finding course, and have other inexpensive hairsprings to practise with. I also got some vintage tools I’d love to use. Until now for me levellers were only the Oliver Cromwell people, but ebay never ceases to surprise...
I could pass the first stages of correcting the coil, with two tweezers. But could not find a use for the vintage tools. Could you help me to figure it out?
Picture 1 is the bent hairspring
picture 2 and 3 the box of tas levellers
picture 4 is the hairspring suffering under my tweezers now
picture 5 shows the tip of the tools
picture 6: from De Carle. Would this be the purpose of the levellers? The overcoil?
Is there a 'golden rule' relating to relocating a hairspring onto a balance staff with regards to getting zero beat error after it has been removed for attention. I usually take pics or use marker pen but sometime forget!
This ETA 811 based Titus has me beaten, at least for the time being. I suspect it will be a "long term project", where long might turn out to be infinite.
The thing will now run, having been previously locked up solid with grunge, and the after effects of some other ham-fisted individual pulling it apart and not quite putting it all back together correctly.
It needs a balance, since the HS is mangled, the jewel is missing and both pivots are gone.. and so is the stud. Whether I am willing to spring for £20 or so for that, given the over all condition of the rest of it, I don't know.
It also needs hands.. all three of them (I may have a suitable hour and minute, but not the second), and a crystal, and the lead solder holding on one of the lugs removed and replaced with silver solder, and a dial you can actually read, which isn't full of dents, that would be nice too.
If I put in all that work, it would be quite an attractive watch, but is it worth the time and expense I wonder.
They do turn up in some interesting watches, this for example according to the seller has a BG 866 variant.
.. and I must confess that if one of those turned up in need of parts, I too would be tempted to perform a partial brain transplant with the poor old Ackro De Luxe as the victim.