ceejay Posted October 29, 2014 Report Share Posted October 29, 2014 Just wandering what you guys do when replacing a mainspring, of a known calibre. Do you measure it and buy one per the measurements or do you buy one per the calibre reference? Ive got to do a ETA 2824-2 mainspring and I have the choice of buying the whole barrel complete with arbour and mainspring, measuring it and buying by the measurements reference or buying it by the calibre reference. I will probably do the measure and buy from that. I am proficient using the mainspring winder Or I may just make a new hooking (arbour) end snapped What do you guys do? Quote Link to comment Share on other sites More sharing options...
Rolexman Posted October 29, 2014 Report Share Posted October 29, 2014 When it is a known calibre I buy it by ref#. Why pay for the barrel and arbor if they are still fine? New mainsprings come rolled on a special plate that can be easily pushed in te barrel without any fuss. Quote Link to comment Share on other sites More sharing options...
krpster Posted October 29, 2014 Report Share Posted October 29, 2014 Concur with Rolexman Quote Link to comment Share on other sites More sharing options...
GenTLe Posted November 1, 2014 Report Share Posted November 1, 2014 Taking the opportunity to ask if there is a safe way to wind an automatic watch spring not having a scary expensive estrapade. I tried once with a spare 2836 barrel and after1h I gave up (and also broke the spring...) Quote Link to comment Share on other sites More sharing options...
ceejay Posted November 2, 2014 Author Report Share Posted November 2, 2014 Taking the opportunity to ask if there is a safe way to wind an automatic watch spring not having a scary expensive estrapade. I tried once with a spare 2836 barrel and after1h I gave up (and also broke the spring...) Invest in a mainspring winder if you are going to be servicing mainsprings. I imagine most commercial watch smiths don't bother with servicing as you can get 'most' mainsprings off the shelf from places like Cousins UK etc. It saves a lot of trouble and time if you just replace the mainspring rather than service it. I do it for practice for when the time comes (maybe) that I have to do it. I have just ordered a 2824-2 spring from Cousins. Quote Link to comment Share on other sites More sharing options...
GenTLe Posted November 3, 2014 Report Share Posted November 3, 2014 Mainspring winders are massively espansive unfortunately:( Quote Link to comment Share on other sites More sharing options...
ceejay Posted November 12, 2014 Author Report Share Posted November 12, 2014 Well the mainspring from Cousins arrived and it had the same problem as the one that I snapped. The centre arbor coil was too big, on the original mainspring this was due to the mainspring winder enlarging the coil when inserted onto the winder. But I was surprised that the mainspring from Cousins that was 'supposed' to be for the 2824 had a enlarged centre arbor hole. Out with the strong tweezers and gradually closed up the last coil until it gripped the hooking. Is this the norm with new hairsprings? Quote Link to comment Share on other sites More sharing options...
Rolexman Posted November 12, 2014 Report Share Posted November 12, 2014 Strange. Never encounterd that. Quote Link to comment Share on other sites More sharing options...
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