Jump to content

Search the Community

Showing results for tags 'mainspring'.

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


    • Watch Repairs Help & Advice
    • Your Walkthroughs and Techniques
    • Showcase Your Achievements
    • Watch Repair Tools & Equipment
    • Watch or Horology Related Videos
    • Clock Corner
    • WRT News & Announcements
    • Introduce Yourself Here
    • Your Watch Collection
    • Chat About Watches & The Industry Here
    • Relax Zone: Chat About Anything Here
    • Help & Support With This Website
    • Watch Repair Course
    • Watch Parts and Tools Suppliers
    • Resources and Articles

Find results in...

Find results that contain...

Date Created

  • Start


Last Updated

  • Start


Filter by number of...


  • Start





Website URL







  1. After having experimented with some very cheap watches I thought it was time to attempt something a little nicer. Bought this silver pocket watch and took it apart. Noticed quite a few of the jewels were shattered so is likely to be beyond my skill set at the moment to restore anyway. Despite that, I decided, probably unwisely, to examine the mainspring and measure it up for a replacement so rendering it useless in the process. The measurement I have taken are: Height: 2.6mm Thickness 0.2mm Length: 520mm ID of barrel: 16.5mm Type TR Then I find out there
  2. I too have a Longines 7084460 with broken mainspring. What would be the correct replacement spring for it and do Cousins do one.? The number is engraved on the movement. This number is engraved inside the case back. 23204 114 Thanks guys.
  3. I am working on a Bulova 11 BLC movement and trying to source a new replacement mainspring, does anyone know where i may be able to source one?
  4. I'm trying to release the tension in the mainspring on an Elgin grade 144 pocket watch and unlike my grade 291, this one has a hidden click and the main barrel is tucked underneath a plate. I've looked online and found a single forum post stating I need to push a pin or very small object into a hole underneath the main barrel (which there is one) while simultaneously holding the stem in place to stop it from unwinding all at once. The problem is, I've got a single screwdriver that fits in this pinhole and after poking around in a few directions, it doesn't seem to be releasing the cl
  5. Hi everyone! I have recently acquired a couple of Vostoks which are giving me trouble. I know very little about watch repair, but am told that these ex-military pieces are pretty robust and easily fixable. Any advice appreciated! 1) a Komandirskie (apparently late 70s or early 80s). Worked like a dream when it arrived, then stopped. I took it in for repair, and was told that the mainspring has snapped. The watch has been sent away, but I'm now told that the repairer cannot get the necessary parts. 2) An Amphibia (same era). Again, worked when it arrived, but has stopped in the past
  6. WRT Members, I have a 50's/60's era Waltham men's wristwatch that needs some help. It's in amazing (as-new) condition, but while wearing the other day, it stopped - even though there should have been plenty of power in the mainspring. Disassembling for investigation quickly revealed the trouble. The screw-head from the ratchet wheel screw had broken off and found its way in to the train wheels and locked everything up. There appears to be no other damage - thankfully. But now I want to fix the movement. My preference would be to find a barrel arbor and screw - or better yet
  7. Hi everyone, hoping I might be able to get some advice on re-assembling my watch movement. Working on a Bfg-866 movement from an older watch I got as something to practice and attempt to fix. I disassembled it and managed to get the arbour back in it's rightful place in the mainspring, which fixed the winding issue I had had with it. However, on putting the movement back together I got the train wheels all in place and made sure they could all move smoothly after fitting the wheel bridge back into place, however when I try to test wind it without the crown it would wind up and add tension
  8. I have an ETA 2750 movement and I need to replace the mainspring. My catalogs don't cover this caliber. The current mainspring, based on my measurements has the dimensions Dennison (Metric), W: 5 1/2 (1.45 mm), T: 9 (0.13 mm), L: ~ 14 1/2" (368 mm). However, due to its age and the fact that it's been serviced before I'm not completely sure the old spring is the correct one. So my first question is are these the right dimensions for the proper mainspring for the 2750? My second question is does anybody know some part or catalog numbers for the correct mainspring by some different manuf
  9. Hi all, Strange I have two Fema clock movements to repair, both with broken mainsprings and one with a broken click spring, can you please tell me, are the click springs readily available???has anyone bought one, if so where from? Photo attached of good click spring, this is the type that I need.. Hope you are all well.. Thx Len
  10. Hmmm, kind of! But........ It shows great potential as a hobbyist alternative, with some tweaking. After a back and forth with @Andyhull on another thread it got me to thinking perhaps it's not as useless as my initial annoyance led me to think, (I broke a mainspring trying it but to be fair the spring had been previously abused and the tool wasn't ideally sized allowing the coils to jump and tangle). I had a bit of a resize with sanding stick and scalpel and tried again and it's certainly got promise, I need to tweak the file to suit specific barrels but it's a simple quick 3 p
  11. Recently replaced the mainspring in a vintage watch (a Westfield 7j). Cleaned and lubricated watch. Worked fine for several days. Now I have a problem in which it stops before the mainspring is fully unwound--power reserve appears to be less than 24 hrs, but I haven't done a precise check. Just noticed this morning that it was stopped at about 0530. Prior to this the watch had good power reserve and the mainspring fully unwound--power reserve over 30 hrs. What kinds of things might cause this?
  12. Hi, I have a Rotary Monza I am fixing up. I disassembled the barrel and removed and cleaned the mainspring. I secured a copy of the parts list and it shows that as well as the mainspring, there is also a Brake Spring (part 775 on the picture). What is it, and do I really need it? Certainly Cousins does not sell it. I googled AS 1902 brake spring and ONE result came up of a Russian watch forum discussing this item. Apparently it is thicker than a normal spring and it seems to have some sort of bent over feature on it. Can I just make one using the old mainspring? If so, how long should it
  13. Hello. I am a hobbyist watch fan. I have recently serviced my Molnija pocket watch with caliber 3602(hand-wound movement). Watch was back in wonderful state (shown in photos) and ran roughly 40 hours during first day of test. After couple of days, I noticed that the watch stops after running about 30 hours although it was wound fully. I opened it up to check what went wrong and surprised to see that mainspring had substantial amount of power remaining. I guess the mainspring had about 10 hours of power left. What do you think had stopped the watch? Please help.
  14. I'm looking for a replacement mainspring for an old Elgin movement. CousinsUK seems to me to have the best "look-up" feature UNLESS your search comes up empty. The original spring is 0.1MM X 1.25 MM X roughly 270MM in length. this of course turns up nothing. What variable do you start with that is least injurious to the movement and accuracy when you must locate a substitute mainspring. I understand that heaight and length are rather fixed variables. Can I go up slightly in strength without too much badness happening? Thanks, RMD
  15. Hello! As stupid as it sounds: how do I oil the mainspring in a clock? I got Moebius 8200 for that. Thank you, Bogdan
  16. Hello. I am a reckless novice in the field of watchmaking and I always risk breaking parts when I work on watches. Of the parts, I often get confused about how to put back the mainspring in the barrel. Most of times, I make mistake by winding it back in to the barrel in wrong direction and mainspring gets curved the other way. (I do this by hand since I have no mainspring winder) Is there a tip on how to get started in correct direction??
  17. Hello watch repairers. I have been working on vintage caliber Unitas 6325. Since it was my second time with the movement, I did not have any trouble servicing it. But I made a mistake when fitting barrel arbor to the mainspring and disaster happened when I tried to wind it up after assembly. The spring made cracking sound and I found broken mainspring upon opening up the barrel. The end tip where arbor is fitted was bent as arbor was released from the mainspring when I tried to wind it up. To reshape the tip, I bent it the other way and it chipped off. I t
  18. I’d be surprised, but very happy, if anyone has the knowledge to help me out with the following. I’ve bought a Russian watch having a Poljot 2614.2H movement (Cornavin Dolphin) on eBay which I’m now servicing. My problem is that I need a new mainspring for it (or barrel complete) but I’m unable to find anyone who can supply it. I found some other Poljot mainsprings on eBay and CousinsUK.com, but non for the 2614.2H. For example, on eBay I’ve found a mainspring for a 2609/2614B, and on CousinsUK.com I’ve found a barrel complete for the 2609. However, I have no idea whether
  19. Hello All. I am trying to repair my late fathers pocket watch, I have removed the broken mainspring and now need to source a replacement. Any help regarding where these can be bought would be much appreciated. The spring is 480mm long, 2.8mm height, 0.15 thick and has a slit at the end to attach to barrel approx 8mm x 1.5. Many thanks for any help you can give.
  20. More than one time I saw requests for mainspring sizes. There are rules, how to calculate the optimum mainspring for a given barrel. I packed them into a tiny windows app: just enter the barrel diameter and the optimum spring will appear. App attached for download (unpack the zip file). Frank Mainspring.zip
  21. Just about to service my old Omega Seamaster Automatic in a 165.003 case (15ct rolled gold with s/st back) with Cal 552 movement but need some help before I go further. Serviced (very badly) about 15 years ago (but not used much since except for last 2 years or so) and I remember sending it back as movement was loose in the case!! Just opened it up to find gouge marks in it which appear to have been caused by screw or something jamming under rotor and only 1 dial screw fitted ( I have a new one ready)!!! However it still runs well but is obviously ready for a service. What I would like to
  22. Hello everyone, I am looking to purchase a mainspring winder. What sort of things should I look out for when searching for one? I am going to be working on watches primarily (as a hobby). Is it possible to purchase one that will cover all watches or are there different sizes for different watches? Does anyone have any recommendations as to what they have purchased? Thanks In Advance
  23. I'm really interested in finding out what main characteristics in a mechanical watch decide how much power reserve one can achieve. Can an existing watch be retro-fitted to enhance power reserve and is it recommended? I'm thinking does it impact on the other components in a watch?
  24. Hi gurus, I have picked apart my first actual watch (although a cheap one I bought for this purpose), and am preparing to clean and oil it. For the mainspring, I am however not comfortable with how I'm supposed to clean it and could use some help! I have an L&R style cleaner that rotates through three jars, and below is the picture of the bottom basket and the mainspring. My question is: do I simply coil the mainspring into the basket or do I need to clean it "old style" with a piece of paper and oil? I believe Mark said in a video that he puts the spring in the bottom basket of
  25. I need help finding a certain mainspring for an old pocket watch I have. The dimensions are: Length=520mm, Height=2.4mm, Strength=0.22mm, Inner barrel diameter= 15.5mm. It uses a normal bridal hook
  • Create New...