Jump to content

Recommended Posts

Posted

So onto my 7750 venture and its taken me 6 months but I am there......well almost. One thing I just havent been able to get confident with is the balance work, IE hairspring, regulator, etc etc. I have tried and practiced and destroyed. Lol. Its expensive training.....lol. Anyway I think when it comes to the balance assembly id prefer to leave that to an expert. I have these parts and am looking for someone to put them together for me. Id be willing to trade a favors if at all possible. I honestly dont expect free service but im also not going to pay rolex shop prices. Anybody interested let me know.....or if you think you can coach me through it. This work just seems like its on another level all together. d64e8150c4f9e62f56f95b619cf4e4f0.jpga5c4e4d3e41e59bed2eebbea67f76f9c.jpg

 

Sent from my SM-G950U using Tapatalk

 

 

Posted

I would put your 7750 aside and take some cheaper o watches and practice in them first, balances can be tricky, however only way to learn is to practice. Was a few years before I started on 7750s

  • Thanks 1
Posted

I agree with jnash, putting this project aside, tricky regualtor pin and stud installation.There was talk of some video on the forum showing how to install the pin and stud Best to invest time reading on and practice before you attempt.

I once damaged the regulator arm when trying to install the pin. 

Posted

Ive had a lot of folks give me that exact same advice.....although my wallet wouldnt agree but im glad I didnt listen. The 7750 was the movement I began on, I quickly picked up the elgin 462, and then subsequently the venus 170 when I learned of the castle wheel mechanism. So essentially I have 3 builds going on at the same time where I have been hopping back and forth. I ran into this same problem with the balance assemblies on the 170 and a guy who has a shop TX built them for me. I may reach out to him. I have some ideas on building some specific tooling to assist in putting these together. This may sound crazy but it seems as though the issue is for me of a physical nature. I just dont think I am steady enough to do the work. Anyway if you happen to have the link to that video send it over. Ive watched plenty and its not a matter of understanding.

Sent from my SM-G950U using Tapatalk

Posted

Hi, So far as I know the forum places no limits on the number of questions one can ask.  Personally I enjoy talking watch repair to you.really :geek:

Posted
Hi, So far as I know the forum places no limits on the number of questions one can ask.  Personally I enjoy talking watch repair to you.really :geek:
Lol. It is a fascinating subject for sure. I completed my second 7750 movement resoration last night. This time it was perfect on the machine with no adjusting. Im also getting faster and faster at putting this thing together. I did end up sending out the balance work. I will tackle it, just not yet. ecc7b452dab552b200de1cb32b110b04.jpg

Sent from my SM-G950U using Tapatalk

  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Hello and welcome to the forum, the best path to take is to get some medium priced tools , look at Cousins UK . They are a material house and are open to all. There medium priced screwdrivers are middle of the road and wil if looked fore serve you well into the foture I have added a little reading for you to help.  TZIllustratedGlossary.pdf Watch_tools_tipps.pdf
    • After another long hiatus (while waiting for truing calipers to arrive), I’ve made some more progress. TRUING IN THE FLAT I was able to use the calipers I purchased to true the wheel in the flat. There’s still a very slight eccentricity in the round, but I’m going to leave it as is. It doesn’t wobble any more and I’m happy with that. Thanks for the tool recommendation @mbwatch. It worked well, though I must say it takes a delicate touch to get the balance between the calipers. Also, my calipers effectively have four different variations based on the orientation of the arms (2 sides, 2 orientations each). Some are more tapered than others, though to what end, I can’t quite tell. My first thought was that flipping them over yields arms that can be used for poising. They are K&D horizontal calipers, btw. OSCILLATION TEST @nevenbekriev @JohnR725 After truing the wheel in the flat, I carefully remounted the hairspring and did your oscillation test. Balance wheel mounted to balance cock, no pallet fork, rotate balance wheel 180 degrees, let it go, and time+count the oscillations. Results as follows for dial down orientation: Duration: 1m 15sec (to full stop) # of oscillations: About 125, though the amplitude of the oscillations decreased significantly, as one might expect I should redo the test in at least two other orientations…Forgot to do that. 🙂  In general, it’s safe to say this watch has a pretty low amplitude, likely for a variety of reasons. I haven’t oiled the balance jewels FWIW…I should probably do that, but I really don’t want to keep disassembling and reassembling the balance. Is it possible to oil those jewels (top and bottom) by just removing the capstones and putting in a tiny amount of oil, with balance in place? I can see how having the pivot in the jewel hole could change how capillary action works, and thus might pull more oil in than desired. However, those capillary forces will be in effect anyway once the balance is inserted. PRACTICE MOVEMENTS @JohnR725 I agree with your sentiment about using practice movements wholeheartedly, and I’ve done that to some degree. The watch I’m currently repairing is for a friend, and she was willing to have me treat it as a “learn-by-doing experience.” With that said,, I probably should have purchased a few more “beaters” before getting to something where I don’t want to muck things up. I’ve still got a couple of those on the bench that I used as donors, and I’ll try to rehabilitate them.
    • Hi, this is the first place I found when looking for advice so I hope someone could advise me.  Im completely new to touching watches but I’ve always wondered how they work.  I’ve bought a cheap movement, an ETA replica to take apart and rebuild.  Im thinking I’ll need some screwdrivers, tweezers, movement holder and a loop? My goal is just to have a go first and see if I enjoy it enough before buying more tools.  Do I buy cheap tools for now and get better quality tools later if I enjoy it like I think I will? or will the cheap tools be a pain and take some of the fun out of it?  With quality tools being relatively expensive I’m unsure what to buy.    Any advice would be greatly appreciated!
    • Yeah I have seen 44-56 documented for Elgin 18 size elsewhere. I have the style of gauge that's like a set of feeler gauges and I never noticed before today it is faintly stamped "Elgin". Pictured is the way I have been measuring. I am going to go to a larger jewel than the 42 that had been in there. I recently won an auction on a big set of Fitrite jewels all in the little bottles, to discover that the what's actually in the bottles bears no relation to the chart of sizes printed on the box. In most cases it seems to be all mixed so in fact I have about 24 little bottles and thousands of assorted jewels of all diameters and lengths, which is better than nothing. But since I don't have a micrometer with a table, measuring for the exact diameter will be a big job. Instead I will test a lot of them in the fork slot the same way I measure with the gauge. But this is still the next thing. I have to get the escapement to unlock first.
    • it would be nice to have the exact model of the watch the or a picture so we can see exactly what you're talking about. this is because the definition of Swiss watch could be a variety of things and it be helpful if we could see exactly the watch your dealing with then in professional watch repair at least some professionals they do pre-cleaned watches. In other words the hands and dial come off and the entire movement assembled goes through a cleaning machine sometimes I think a shorter bath perhaps so everything is nice and clean for disassembly makes it easier to look for problems. Then other professionals don't like pre-cleaning because it basically obliterates the scene of the crime. Especially when dealing with vintage watches where you're looking for metal filings and problems that may visually go away with cleaning. Then usually super sticky lubrication isn't really a problem for disassembly and typically shouldn't be a problem on a pallet fork bridge because there shouldn't be any lubrication on the bridge at all as you typically do not oil the pallet fork pivots.  
×
×
  • Create New...