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Dalton121 · 27 September 2018, 03:52 AM

Does anyone have an answer to why Rolex uses the internal spring-bars on their new SEL bracelets instead of using a normal pin. Surely using a pin like the rest of the links would make it much stronger?

Heff · 27 September 2018, 04:22 AM

Probably for ease of replacement.

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Tools · 27 September 2018, 04:33 AM

My guess would be that the link halves are pre-made and pressed together in batches.

The end-link is added later for the model needed and it would not be efficient to pull the links apart to do the job.

Dalton121 · 27 September 2018, 06:10 AM

So then would you say the bracelets are weaker for it? Or maybe don’t have as much logevity or does it make no difference?

Tools · 27 September 2018, 06:21 AM

We would need the cross sectional area or diameter comparisons to calculate shear strength.

It's likely that shear strength and load capacity would be very similar once assembled.

Dalton121 · 27 September 2018, 06:28 AM

Thanks Larry for your replies!
What I would be more concerned with is if the spring gives out won’t the ends compress and simply have the end link fall out.. and if you swim with your watch surely the spring will get wet and degrade over time?
Maybe I misunderstand the mechanics of how the spring pin works (kinda hope so)

27 September 2018, 03:52 AM	#1
Dalton121 "TRF" Member Join Date: Jan 2018 Real Name: Dalton Location: South Africa Posts: 54	SEL internal spring-bars Does anyone have an answer to why Rolex uses the internal spring-bars on their new SEL bracelets instead of using a normal pin. Surely using a pin like the rest of the links would make it much stronger?

27 September 2018, 04:33 AM	#3
Tools TRF Moderator & 2024 SubLV41 Patron Join Date: May 2007 Real Name: Larry Location: Mojave Desert Watch: GMT's Posts: 43,514	My guess would be that the link halves are pre-made and pressed together in batches. The end-link is added later for the model needed and it would not be efficient to pull the links apart to do the job. __________________ (Chill ... It's just a watch Forum.....) NAWCC Member

27 September 2018, 06:21 AM	#5
Tools TRF Moderator & 2024 SubLV41 Patron Join Date: May 2007 Real Name: Larry Location: Mojave Desert Watch: GMT's Posts: 43,514	We would need the cross sectional area or diameter comparisons to calculate shear strength. It's likely that shear strength and load capacity would be very similar once assembled. __________________ (Chill ... It's just a watch Forum.....) NAWCC Member

27 September 2018, 04:22 AM	#2
Heff "TRF" Member Join Date: Feb 2017 Location: Germany Watch: Speedmaster Pro Posts: 1,023	Probably for ease of replacement. Sent from my iPhone using Tapatalk

27 September 2018, 06:10 AM	#4
Dalton121 "TRF" Member Join Date: Jan 2018 Real Name: Dalton Location: South Africa Posts: 54	So then would you say the bracelets are weaker for it? Or maybe don’t have as much logevity or does it make no difference?

27 September 2018, 06:28 AM	#6
Dalton121 "TRF" Member Join Date: Jan 2018 Real Name: Dalton Location: South Africa Posts: 54	Thanks Larry for your replies! What I would be more concerned with is if the spring gives out won’t the ends compress and simply have the end link fall out.. and if you swim with your watch surely the spring will get wet and degrade over time? Maybe I misunderstand the mechanics of how the spring pin works (kinda hope so)

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