Hairspring CGS & specifications.

[Nucejoe]

How do I find out the CGS parameters and specifications needed to place order with the hairspring producer.

What tool to measure torque vs radial displacement with?  I have heard of ergometer.

I am sure the subject has been previously covered, no luck with the search function.

Thanks in advance.    

 

 

[oldhippy]

Best to contact the hairspring producer.  Years ago you could get charts for this sort of thing. These days I think it is beyond most watch repairers.  

[jdm]

3 hours ago, oldhippy said:

Best to contact the hairspring producer.  Years ago you could get charts for this sort of thing. These days I think it is beyond most watch repairers.  

How can you contact an hairspring producer. There are only like 2 or 3 in Switzerland and they don't correspond with repairers or individuals. 

[Nucejoe]

5 minutes ago, jdm said:

How can you contact an hairspring producer. There are only like 2 or 3 in Switzerland and they don't correspond with repairers or individuals.

You stated my next question and answered it. My order would be for five hundered HS which I don,t think meet their MOQ either. So back to fixing HS?

[wls1971]

Not all hairsprings are produced in Switzerland China and India must have domestic production of hairsprings, and this British firm manufacture custom made Hairsprings and carry's a large range in stock.

http://www.britishprecisionsprings.co.uk/html/custom_springs.html

[Nucejoe]

3 minutes ago, wls1971 said:

Not all hairsprings are produced in Switzerland China and India must have domestic production of hairsprings, and this British firm manufacture custom made Hairsprings and carry's a large range in stock.

http://www.britishprecisionsprings.co.uk/html/custom_springs.html

Ya looks like the britisnh company don,t correspond with repairers either. @clockboy once introduced a company.

Do you know of a company sells to repairers.

[jdm]

16 minutes ago, wls1971 said:

Not all hairsprings are produced in Switzerland China and India must have domestic production of hairsprings, and this British firm manufacture custom made Hairsprings and carry's a large range in stock.

http://www.britishprecisionsprings.co.uk/html/custom_springs.html

Correct, and as you noted the British has a website and contact info. The Swiss have the website and a marketing but only talk to mov't producers when obliged by regulations and wide trade agreements (see link below), and good luck about talking to Chinese for less than 1,000 pieces. I'm not aware of any production in India., the only remaining producing country is maybe Russia, then we have Japan and the countries where they own factories, but both of them don't produce to customer specifications.

https://www.europastar.com/watch-knowledge/1004087450-mechanical-who-will-succeed-eta.html

Edited September 11, 2019 by jdm

[Nucejoe]

There should be many out of the family, that would vibrated with the BW, but how to identify em?

[jdm]

6 minutes ago, Nucejoe said:

Do you know of a company sells to repairers.

I don't think you will have any luck talking to manufacturers, and only with the old way of scouring Ebay can ger you a solution.
If you have trouble with shipping or paying from your country just PM and we'll find a way.

[Nucejoe]

2 minutes ago, jdm said:

Correct, and as you noted the British has a website and contact info. The Swiss have the website and amerketing but only talk to mov't producers when obliged by regulations (see link below), and good luck about just talking to Chinese for less than 1,000 pieces. I'm not aware of any production in India., the only remaining produced is Japan and the countries where they own factory, but the don't produce to customer specificatsion.

https://www.europastar.com/watch-knowledge/1004087450-mechanical-who-will-succeed-eta.html

1000 piece of one type is acceptable too.  I don,t dare posting on chinees portals, they follow you for life.

[jdm]

3 minutes ago, Nucejoe said:

1000 piece of one type is acceptable too.  I don,t dare posting on chinees portals, they follow you for life.

Hey we could make a WRT mov't , limited edition 1,000 pcs, ahaha
Yes if you post interest on Chinese websites you will get follow-on emails. That is just proper marketing, as invented in America 200 yrs ago. My own country telesales are worst.

[Nucejoe]

5 minutes ago, jdm said:

I don't think you will have any luck talking to manufacturers, and only with the old way of scouring Ebay can ger you a solution.
If you have trouble with shipping or paying from your country just PM and we'll find a way.

I used to keep radar on ebay, only usual assortments. Lets find the merchandise first, I can arrange for payment through my niece attending school in oxford. Have problem with making small payments only.

Thanks for your help offer, very kind of you.

[Nucejoe]

7 minutes ago, jdm said:

Hey we could make a WRT mov't , limited edition 1,000 pcs, ahaha
Yes if you post interest on Chinese websites you will get follow-on emails. That is just proper marketing, as invented in America 200 yrs ago. My own country telesales are worst.

Then again you stated one of my suggestions..  WRT watches.  

Edited September 11, 2019 by Nucejoe
Exceelent quality ofcourse to measure up to WRT.

[jdm]

3 minutes ago, Nucejoe said:

Then again you stated one of my suggestions..  WRT watches.  

It would be absolutely doable, check for example "chinese watch group project" on WUS. But as it happens this is more a repair site than a collector's one, so I doubt it would raise enough volume. Then again, stay tuned for crowdfunding projects by the usual suspects.

[Nucejoe]

17 minutes ago, jdm said:

It would be absolutely doable, check for example "chinese watch group project" on WUS. But as it happens this is more a repair site than a collector's one, so I doubt it would raise enough volume. Then again, stay tuned for crowdfunding projects by the usual suspects.

Ya, collectors ideas. I enjoy repair, just drifted into collecting. 

[clockboy]

Damaging hairsprings is I am afraid a serious issue today because finding replacements is really difficult.. The Breguet hairspring is another added complication ,achieving the overcoil is difficult and I have failed trying  to achieve it myself. However with nothing to loose I would first try and repair the damaged spring. If it just becomes un repairable spring then the only option is to try to take measurements of the hairspring and search for a replacement. This company supply new springs, most are un collected and they are very slow in delivering.The other issue is I have never worked out their size system.

http://www.britishprecisionsprings.co.uk

[jdm]

On 1/1/2022 at 11:19 AM, clockboy said:

 This company supply new springs, most are un collected and they are very slow in delivering.The other issue is I have never worked out their size system.

http://www.britishprecisionsprings.co.uk

I think we have to set the right expectations about the offering from that company. We had a long discussion about them and their way of measuring hairsprings earlier on this topic. My conclusion after some reasoning:

First thing that one can notice is that the O.D. starts at 6mm, which could be right for a 12mm balance wheel, something like a 13"" mov.t! Based on that only, I suppose these are not wristwatch, and possibly not even clock hairspring. Rather, have been made for a variety of other devices, like speedometers, detonation timers, pressure meters, just like their home page says.

To which Master praezis replied

Totally agreed. Most springs were made from bronze alloy, those can be used for alarm clocks at best. 

[clockboy]

I have found the “ British Precision Springs” I purchased approx 5 years ago. I also have some I purchased on eBay as well and the ones I purchased are to small for clocks. I measured the height and strength for my reference so I had a reference point for any further purchases. However the issue was it took over three months for them to supply and that was only after many emails and telephone conversations. 
Looking at their web site it looks like they now only supply a few that are colleted. 

[jdm]

14 hours ago, clockboy said:

I have found the “ British Precision Springs” I purchased approx 5 years ago.

For which mov.t are these? The point I was trying to make earlier, is that in their published list there is practically no wristwatch hairspring for sale.

[clockboy]

I cannot remember the watch, it was 5 years ago but it was for a watch. Agree that the majority of springs on the site seem to be for clocks which is a real pity as there is a definite gap in the market to be filled. 

[Nucejoe]

 Of metals/ alloys  britishprecisionhairspring are made , Nickelsilver recommended Nispan but Praeis didn't sound impressed with their products. Been thinking if their spring meets the low standard I think is suitable for my vintage Oris movements. 

I tried contacting the company twice but no replay so far, Clockboy is very right they are awefully slow. 

 

[jdm]

4 hours ago, Nucejoe said:

 I tried contacting the company twice but no replay so far

At about the time email became ubiquitous I have learned that if someone doesn't reply within few days, it never will. 

Some "companies" are just individuals that have bougth or iniherited old stock and lazily sell it online.