In-depth interpretation, Rolex “Daytona 4130 movement”

[Watch House Watch Technology] Today, I want to focus on the Rolex 4130 chronograph movement.

Daytona, has always been the most popular watch of Rolex, and the Daytona used in the sale is the Rolex 4130 automatic chronograph movement. Over the years, there have been many introductions and interpretations of the 4130 movement. The 4130 movement is an automatic chronograph movement that perfectly combines practicality, leading technology, and compact design. I will summarize the technical characteristics of the 4130 movement and make a concentrated interpretation of the Rolex 4130 movement.

Rolex 4130 automatic chronograph movement

Rolex 4130 automatic chronograph movement

The basic information of Rolex 4130 automatic chronograph movement is as follows:

The Rolex 4130 automatic chronograph movement, launched in 2000, is the first self-produced automatic chronograph movement of Rolex. The 4130 automatic chronograph movement was used on Daytona 116520 for the first time, which replaced the 4030 automatic chronograph movement used on Daytona 16520 (Rolex purchased Zenith El Primero chronograph movement, and it was modified and numbered 4030 movement. ).

Rolex 4130

Rolex 4130

Rolex Daytona 116520, which started using the 4130 movement in 2000, has been discontinued and replaced by 116500.

4130 automatic chronograph movement, size 30.5 mm, thickness 6.5 mm, 44 jewel bearings, swing frequency 28800 times/hour, power 72 hours, use cylindrical wheels, vertical clutch.

Daytona 116500

Daytona 116500

The 4130 movement has been developed for 5 years and has 201 parts. Compared with the 4030 movement (the Rolex version of the Zenith El Primero movement), the 4130 movement has reduced the number of parts by 60%, and the 4130 movement has also reduced the number of parts. For example, the 4130 movement reduces the types of screws to 12, while the 4030/El Primero movement uses 40. The simplification of components increases the reliability of the 4130 movement and is easy to maintain.

Rolex 4130 automatic chronograph movement

Rolex 4130 automatic chronograph movement

The 4130 is Rolex’s first self-produced movement with ceramic ball bearing automatic rotor, with two-way winding (note that it is self-produced, 4030 is purchased). Due to the use of ceramic ball bearing automatic rotor, the winding efficiency is increased by 68%. It is also the first movement of Rolex to use Parachrom blue niobium hairspring.

El Primero movement

El Primero movement

The wheel train layout of the Rolex 4130 movement is different from most automatic chronograph movements.

The Rolex 4130 automatic chronograph movement uses a vertical clutch and the movement uses a central two-wheel layout (that is, the two wheels are in the center of the movement and the second wheel is at 6 o’clock). Most other automatic chronograph movements with cylindrical wheels and vertical clutches usually use a partial two-wheel movement layout (that is, the second wheel is not in the center of the movement, and the second wheel is in the center of the movement). The reason why the Rolex 4130 movement adopts the central two-wheel movement layout is to make the movement thinner and avoid the “common problem” that automatic chronograph movements are usually thick.

Rolex 4130 movement, timing components structure.

Rolex 4130 movement, timing components structure.

The cause of the problem lies in the “vertical clutch”.

The vertical clutch is a standard configuration of modern chronograph movements. Vertical clutch mechanism, running seconds wheel, chronograph second wheel, up and down “vertical” layout (some movements are “up and down staggered” layout), through the middle “friction plate” to achieve the upper and lower gears (gear connection or separation). The advantage is that through the “friction plate” clutch, the two gears are connected “up and down”, so there is no gear meshing, and there is no problem of jitter or unsmooth.

Rolex 4130 movement

Rolex 4130 movement

However, the vertical clutch has a shortcoming, that is, the “vertical” layout of the time and chronograph seconds wheel. The vertical clutch is often arranged in the center of the movement (most chronograph movements use a second wheel layout, and the second wheel is in the center of the movement, so the seconds The wheel and the vertical clutch are made in the center of the movement), plus the automatic winding parts of the automatic chronograph movement and the automatic rotor are also in the center of the movement. They are all stacked layer by layer, which creates the movement. The thickness is greatly increased.

So this is the reason why many new automatic chronographs (using vertical clutch) are relatively thick, but every player can feel that Rolex Daytona is relatively thinner in comparison, which benefits from 4130 The special design of the movement.

Rolex 4130 automatic chronograph movement, the unique design is that the second wheel is at the 6 o’clock position of the movement, and the chronograph second wheel is in the center of the movement. Rolex has made the vertical clutch a “bridge” between the second wheel and the chronograph second wheel. , Removed the vertical clutch from the center of the movement. The original “vertical” layout of the second wheel and chronograph second wheel in the vertical clutch has become a “flat”, “horizontal left and right” layout. This greatly reduces the thickness of the movement.

The thickness of the 4130 movement has been reduced, but there is a new problem to be solved.

Although the Rolex 4130 movement solves the thickness problem, Rolex still has a new problem to be solved. As mentioned earlier, Rolex has changed the “up and down” second wheel and chronograph second wheel into a “horizontal left and right” layout. The layers are engaged/separated by friction plates).

Rolex 4130 movement

Rolex 4130 movement

The thickness has dropped, but Rolex has to face the problem of meshing between gears again. (Generally, the vertical clutch of a chronograph is thicker in the center of the movement, but the second wheel and the chronograph second wheel are superimposed on top and bottom, and they are completely connected by friction plates, so there is no gear biting problem, so each has its advantages and disadvantages. Perfect).

Veteran players may have heard that there is a special gear in the Rolex 4130 movement, which is manufactured using micro-electromechanical technology (MEMS). This is the “chronograph second wheel made by MEMS technology” in the 4130 movement, which is to solve the problem of gears. Meshing problem with gears.

Rolex uses microelectromechanical technology

Rolex uses microelectromechanical technology

Micro-Electro-Mechanical Technology (MEMS) allows gears to be directly formed by photolithography, which can be shaped into various special shapes, and the parts are very smooth without further manual processing. In layman’s terms, a mold is lithographically formed, and the metal is injected into it, and the part is formed OK. Rolex uses micro-electromechanical technology (MEMS) to manufacture the chronograph seconds wheel. The middle of the teeth is the main body, and the left and right lobes are elastic (similar to springs). When the gears mesh with each other, the left and right lobes can be bent inward to ensure that the gears are engaged. When the chronograph is in full contact, there is no gap to ensure that the “chrono seconds hand jitter” will not occur when the chronograph function is activated. This is an important technology in the Rolex 4130 movement.

It should be noted that the early Rolex Daytona 4130 movement did not use micro-electromechanical technology (MEMS) chronograph seconds wheel. The Daytona, which is on sale later and now, has been replaced with a micro-electromechanical technology (MEMS) chronograph second wheel. Early 4130 movement Daytona, if maintenance and repair are carried out in the official Rolex after-sales service, the official will replace the early 4130 with a micro-electromechanical technology (MEMS) chronograph second wheel. The official automatically replaced it.

Finally, to summarize.

Through the summary of the technical details of the Rolex 4130 movement, we can find that Rolex’s pursuit of practicality and detail technology in the watch has reached the extreme. Of course, Rolex is not the only famous watch that has meticulously studied the gears of the movement. In the Breitling B01 chronograph movement, there are similar gears in the vertical clutch transmission, but there is a difference in movement structure from the Rolex (after Breitling B01, I will Write it separately); Patek Philippe has similar technology and design in the movement.

Breitling B01 movement

Breitling B01 movement

On Patek Philippe's new 26-330 movement

On Patek Philippe’s new 26-330 movement

Rolex is currently due to supply and demand issues, the actual market is rising all year round. Regardless of the market, every player who has bought a Rolex should be able to feel that Rolex watches are outstanding in terms of performance and wearing experience. Although Rolex does not have any complicated functions or outstanding features (explosive design, cool hollow, ultra-thin, etc.), its comprehensive capabilities are convincing.