Ed the Grocer (modérateur)
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Paris,
27/10/23, 12:18
 

La nouvelle Ming LW.01 ne pèse que 8,8 grammes (Revues & Essais)

L'industrie horlogere semble lancée maintenant dans une course à la perte de poids.

Il y a les poids lours : on parlait de l'Omega PO en silicon nitride ceramic ICI déjà .

Et les challengers : voici que Ming nous présente la Ming LW.01 qui ne ne pèse que 8,8 grammes. le materiau utilisé AZ31 est un alliage de magnesium aluminium zinc maganese silicone, la couronne en aluminium anodisé, les vis en PEEK (je ne sais pas ce que cela veut dire) , et le mouvement un ETA 2000 modifié par Schwarz Etienne :

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Diametre 38 mm, epaisseur 6,5 mm, manuelle ou automatique (10,8 grammes) :

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Epaisseur :

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Cadran :

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Schéma et elements :

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Il faut rajouter le poids du bracelet :

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Et après la technique, le visuel au poignet :

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Ce qui me frappe, c'est qu'auparavant la notion de legereté etait toujours associée à la finesse. C'est le cas pour cette Ming, mais pas vraiment pour l'Omega PO.

Que nous reserve le futur ?


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Edit : il y aura 200 Ming LW.01 produites.

La description par Ming :version manuelle - 19.500 francs suisses + TVA

(Probably) the world's lightest mechanical watches

Out of our Special Projects Cave and several years in the making, we're proud to present what we believe are the world’s lightest mechanical wristwatches: the MING LW.01 Manual and LW.01 Automatic. They are a featherweight 8.8 and 10.8 grams respectively and for the watch head only.

The challenge

We wanted to push the envelope further than we – or any other brand – has ever done. Why? Because we wanted the challenge.

We set ourselves some ‘conventional’ constraints, though: the watch had to be a wearable size, and retain certain tactile qualities such as the texture and thermal transfer of metal. More importantly, it would have to be practically wearable and not technically compromised purely for the sake of lightness. As it turns out, it would take us a couple of years longer than expected and an exhaustive amount of metallurgy and testing.‍

Exotic solutions to chase numbers

MT began by rethinking the entire case construction to minimize the amount of metal used, whilst retaining (and maximizing) rigidity. In a normal watch, the dial is fixed to the movement, which is in turn fixed to the caseband, with upper and lower bezels forming the front crystal and caseback respectively. The MING LW.01 has a combined “dial” ring and movement holder shaped like a hat, just 0.5mm thick in places but ribbed for strength. To prevent injury to the dial or disruption of the movement, this assembly is supported from the rear by a cage with 3D struts. It also caps and seals the entire assembly to the bezel, which despite being very narrow, is internally hollowed to save further weight.

There is no actual dial per se: the outer ring/background is the movement holder, and the central movement portion is occluded by a gradient print on the outer crystal – which also contains the index markings.

We explored a wide range of ultralight materials including carbon fiber derivatives and hollow-core 3D printing, but ultimately found that AZ31 Magnesium-Aluminium-Zinc-Manganese alloy from Smiths High Performance was both lighter than carbon (1.77g/cc, vs ~2g/cc density), more consistent to produce than hollow 3D printing, and more importantly retained the feel of metal. It is further surface treated by plasmaelectrolytic oxidation by Keronite for corrosion resistance and biocompatibility, with a further composite protective layer. Material choices do not stop there: even the crystal is not sapphire, but instead Corning Gorilla Glass 6 via Knight Optical with an additional hardening treatment. At 2.40g/cc, it is significantly lighter than the 3.98g/cc of traditional sapphire whilst retaining 670 Vickers hardness and high impact resistance.

Every single component on the watch – down to the screws (in PEEK composite), hollowing of the bezel, and anglage of case buttressing – was optimised to hit the absolute balance of durability and weight. The crown is in anodised aluminium for durability of threading reasons. Finite element simulation was used to check overall torsional rigidity of the watch case. Fixed integral bars machined from the same billet as the case both contribute to rigidity and are lighter than steel springbars.

The final result is a complete head weight of just 8.8 grams with manual winding, 10.8 grams with automatic winding, and an additional 0.6 grams for the matching AZ31 buckle, and 1.2 grams for the ‘record’ spec Alcantara strap. This puts a ready-to-wear watch at 10.6g or 12.6g.‍

Referencing details


The LW.01 has a several distinctive features that pay tribute to our earlier creations: the pulse seconds disc with an interference pattern as an evolution of MT’s own Ochs und Junior Simpleton of 2016; a shuriken hour hand from the 17.03, and the gradient and skeleton peripheral ring on the crystal from the 19 series. Indices are a visually ‘lighter’ skeletonized version of the 37 series. It also of course carries the same flared lugs and ergonomic crown of our other watches.‍

It takes an entire village

To machine AZ31 magnesium – let alone to the wall thicknesses and tolerances required – requires some special expertise. Reto Helfenstein of Helfenstein Mechanik was brought in on the recommendation of some mutual friends; his expertise with similar materials for the aerospace industry has proven invaluable. The raw AZ31 billet comes from Smiths High Performance in the UK, and Keronite handles the plasmaelectrolytic oxidation. Manufacture Jean-Rousseau created the single layer Alcantara straps that weigh just 1.2 grams, yet are soft and comfortable to wear without being floppy. Included with the watch are also a selection of other straps for a different feel. We also include a second buckle – in aluminium and in our tuck buckle design – by DBMF. Manufacture Schwarz-Etienne figured out which components within the ETA2000 could be removed or lightened to further save weight, and which had to remain untouched for reliability. Final assembly and testing are conducted at Schwarz-Etienne.

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Ed the Grocer ancienne maison l'Epicier

DJMB

27/10/23, 14:22

@ Ed the Grocer (modérateur)

La nouvelle Ming LW.01 ne pèse que 8,8 grammes

Réflexion personnelle quant au choix de l'ETA2000. J'espère que Schwartz Etienne a bossé en profondeur dessus, car c'est une daube inréglable, avec fréquemment un remontage auto très poussif.

Un 2801 (= 2824 manuel) est un peu plus plus grand en diamètre, mais fiable et moins épais. Tout comme un Peseux 7001, qui est encore dispo il me semble chez ETA. Fréquence basse, mais fiable et fin.

autrichongris
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27/10/23, 15:00

@ Ed the Grocer (modérateur)

La nouvelle Ming LW.01 ne pèse que 8,8 grammes

Ah oui nettement moins que la RM 027, qui pèse le poids désormais énorme d'environ 20 grammes...

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Je déteste deux choses: l'analyse et le pouvoir. Sviatoslav Richter

testoni


29/10/23, 21:04
(Modifié par testoni
le 29/10/23, 22:21)


@ Ed the Grocer (modérateur)

La nouvelle Ming LW.01 ne pèse que 8,8 grammes

» L'industrie horlogère semble lancée maintenant dans une course à la perte
» de poids.

Elle est bien jolie et il doit être très agréable de porter cette montre qui doit coller à la peau et la sentir comme faisant partie intégrante du poignet avec son poids plume. Ha oui mais, avec ses anses fixes il faut passer le bracelet sous la montre, c'est dommage, à moins que l'on ne trouve des bracelets pour anses fixes qui éviteraient cette surépaisseur?

léo
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Kallisté,
30/10/23, 18:34

@ testoni

La nouvelle Ming LW.01 ne pèse que 8,8 grammes

Impressionnant !

Je ne suis absolument pas à la recherche d'une montre poids plume, mais je ne peux que saluer l'exploit technique d'une montre de 38 mm qui ne pèse que 8,8 grammes, mouvement mécanique compris !

Un souhait : qu'une partie des innovations techniques de cette " performance " puisse être adoptée pour alléger les productions actuelles ... :ok:

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" Ce n'est pas le doute, c'est la certitude qui rend fou "
Friedrich Nietzsche

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