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DanP · 4 March 2009, 11:14 AM

Hey guy's n gal's. Just wondering what device is inside a Rolex that prevents it from being overwound ,what does it look like ,and where in the movement is it located? Does this device work when the rotor is winding the watch or only when the crown is winding the watch? And I also was wondering when, say if you wear your Rolex every day all day like I do what percentage would it be keeping wound, or if it is problematic to always have the hairspring always kept with full woundness? Sorry if these are noobish questions, but Im learning everyday about my new hobby and Im not in wis-hood enough yet, so I really appreciate this new TECH subforum.
Thank you very much

Dan

bodybump · 4 March 2009, 04:17 PM

Quote:

Originally Posted by DanP

Hey guy's n gal's. Just wondering what device is inside a Rolex that prevents it from being overwound ,what does it look like ,and where in the movement is it located? Does this device work when the rotor is winding the watch or only when the crown is winding the watch? And I also was wondering when, say if you wear your Rolex every day all day like I do what percentage would it be keeping wound, or if it is problematic to always have the hairspring always kept with full woundness? Sorry if these are noobish questions, but Im learning everyday about my new hobby and Im not in wis-hood enough yet, so I really appreciate this new TECH subforum.
Thank you very much

Dan

ummmm.. i think if not mistaken somebody said Rolex cant be overwound..let me find that thread..

JJ Irani · 4 March 2009, 04:18 PM

Quote:

Originally Posted by DanP

Hey guy's n gal's. Just wondering what device is inside a Rolex that prevents it from being overwound ,what does it look like ,and where in the movement is it located? Does this device work when the rotor is winding the watch or only when the crown is winding the watch? And I also was wondering when, say if you wear your Rolex every day all day like I do what percentage would it be keeping wound, or if it is problematic to always have the hairspring always kept with full woundness? Sorry if these are noobish questions, but Im learning everyday about my new hobby and Im not in wis-hood enough yet, so I really appreciate this new TECH subforum.
Thank you very much

Dan

Apart from the Rolex models, most modern day automatic watches are equipped with a slipping clutch mechanism that prevents overwinding of the movement.

JJ

watchmaker · 5 March 2009, 03:50 AM

It is not a mechanism per se. It is the design of the mainspring, which unlike that of a manual wind watch, is not pinned to the wall of the barrel. Instead, it has a split end which sticks into small scallops on the wall of the barrel when the watch is in use, but when it is fully wound, it travels around each scallop, slipping into place, and never allowing you, or the auto work, to overwind the watch.

That is the distinct click you can hear when you continue to wind a fully wound automatic watch. Try it, it wont damage your baby.

watchmaker · 5 March 2009, 06:22 AM

I have found a rather simple diagram to help.
http://people.timezone.com/mdisher/W...edGlossary.pdf
if you follow that link, download the pdf, and look at page 47 titled The Mainspring of an Automatic Winding Watch

DanP · 5 March 2009, 08:12 AM

GREAT info there mr watchmaker

Hatchet · 5 March 2009, 10:11 AM

Leprechauns.

Alcan · 5 March 2009, 10:43 AM

Almost all automatic winding watches are designed to prevent over-winding. The mainspring is not attached to the barrel, but rides on indents on the inside of it. When the spring is fully wound, the spring slips inside the barrel. A Rolex mainspring and barrel are depicted below. Others are similar.

Btw, the 'slipping mainspring device' was patented by Adrien Philippe, founder of Patek Philippe, in 1863.

P.S. A quick search pulled up these 8 results from here.

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

http://rolexforums.com/showthread.ph...ght=mainspring

DanP · 5 March 2009, 11:12 AM

Thanks Al. I'll remember to use that search from now on to not come across as such a noob

. I forgot everything under the sun Rolex has probably been discussed here

akhamdani · 7 March 2009, 06:48 AM

Quote:

Originally Posted by bodybump

ummmm.. i think if not mistaken somebody said Rolex cant be overwound..let me find that thread..

You are right,that was Tools.

4 March 2009, 11:14 AM	#1
DanP Banned Join Date: Apr 2008 Real Name: Dan P Location: Vancouver. Canada Watch: GV-U-Kno-Me :) Posts: 2,436	What prevents a Rolex from being overwound? Hey guy's n gal's. Just wondering what device is inside a Rolex that prevents it from being overwound ,what does it look like ,and where in the movement is it located? Does this device work when the rotor is winding the watch or only when the crown is winding the watch? And I also was wondering when, say if you wear your Rolex every day all day like I do what percentage would it be keeping wound, or if it is problematic to always have the hairspring always kept with full woundness? Sorry if these are noobish questions, but Im learning everyday about my new hobby and Im not in wis-hood enough yet, so I really appreciate this new TECH subforum. Thank you very much Dan

5 March 2009, 10:11 AM	#7
Hatchet "TRF" Member Join Date: Jan 2008 Location: Mississippi Posts: 444	Leprechauns. __________________ And I say, "Hey, Lama, hey, how about a little something, you know, for the effort, you know." And he says, "Oh, uh, there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. --Carl Spackler in Caddyshack

5 March 2009, 03:50 AM	#4
watchmaker TechXpert Join Date: Feb 2009 Real Name: Scott Location: London Posts: 2,242	It is not a mechanism per se. It is the design of the mainspring, which unlike that of a manual wind watch, is not pinned to the wall of the barrel. Instead, it has a split end which sticks into small scallops on the wall of the barrel when the watch is in use, but when it is fully wound, it travels around each scallop, slipping into place, and never allowing you, or the auto work, to overwind the watch. That is the distinct click you can hear when you continue to wind a fully wound automatic watch. Try it, it wont damage your baby.

5 March 2009, 06:22 AM	#5
watchmaker TechXpert Join Date: Feb 2009 Real Name: Scott Location: London Posts: 2,242	I have found a rather simple diagram to help. http://people.timezone.com/mdisher/W...edGlossary.pdf if you follow that link, download the pdf, and look at page 47 titled The Mainspring of an Automatic Winding Watch

5 March 2009, 08:12 AM	#6
DanP Banned Join Date: Apr 2008 Real Name: Dan P Location: Vancouver. Canada Watch: GV-U-Kno-Me :) Posts: 2,436	GREAT info there mr watchmaker

5 March 2009, 11:12 AM	#9
DanP Banned Join Date: Apr 2008 Real Name: Dan P Location: Vancouver. Canada Watch: GV-U-Kno-Me :) Posts: 2,436	Thanks Al. I'll remember to use that search from now on to not come across as such a noob . I forgot everything under the sun Rolex has probably been discussed here

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