Hublot Big Bang HUB4100 Service Hublot Big Bang HUB4100 - A personal presentation

In my workshop, The Watchmaker in Thessaloniki, I have the honour to meet daily unique watches that carry not only technological value but also emotional charge for their owners. One of these is the Hublot Big Bang with the HUB4100 movement, a model that stands out for its combination of modern aesthetics and mechanical complexity. In this article, I will show you the step-by-step service process, as I recorded it in a short video.

@the.watchmaker.greece Service on an iconic Hublot Big Bang HUB4100 🔧✨ Dismantling, cleaning, polishing and final inspection - step-by-step at The Watchmaker workshop ⏱️ #Hublot #BigBang #HublotBigBang #HUB4100 #LuxuryWatches ♬ original sound - The-Watchmaker

1. The first glance

Every service starts with a thorough external inspection. I check the watch for functionality, the condition of the case, bezel and bracelet. I note any damage or dents that may affect the tightness. The Hublot Big Bang is a watch that immediately grabs the attention, but its real "soul" is on the inside.

2. Disassembly

With great care I remove the bracelet and proceed to open the lid. Each screw, each component, is placed in special compartments so that nothing is lost. Disassembling a HUB4100 requires experience, as it is a movement based on the Valjoux 7750 but with significant modifications by Hublot.

3. Inspection of the mechanism

After removing the bridges, gears and spring drum, I examine each part separately. I check for wear, friction or signs that indicate the watch needs additional repair beyond the basic service. In the case of this particular Big Bang, the movement had shown signs of wear in the lubrication, which is normal after years of use.

4. Cleaning and restoration of the case

All parts of the mechanism are ultrasonically cleaned in special solutions to remove all traces of old lubrication and dust. At the same time, the body is completely dismantled and subjected to a thorough polishing process, with the aim of removing signs of use and restoring its original appearance. Thus, the watch is not only technically perfect, but also aesthetically renewed.

5. Assembly and lubrication

Reassembly is the moment when the watch is "reborn". I place the components in the correct order while applying the appropriate lubricants at strategic friction points. Proper lubrication is critical to the accuracy and long-term operation of a movement like the HUB4100.

6. Adjustment and control

After assembly, I place the watch on the chronograph to measure the accuracy and power of the spring. Micro-adjustments are made patiently until the measurements are close to factory specifications. I also check the operation of the chronograph so that each button responds accurately.

7. Leakage check and final inspection

A watch like the Hublot Big Bang has to maintain its resistance to water. So, after servicing, a waterproofness check is carried out on a special machine. Finally, I reassemble the case and clean the outside of the watch to ensure that it is delivered in near-new condition.

8. The moment of delivery

The most beautiful part of every service is the moment when the watch is returned to its owner. The gleam in his eyes when he sees the Big Bang working accurately again and looking refreshed on the outside is the best reward for my work.

Conclusion

Servicing a Hublot Big Bang with HUB4100 is not a simple process. It requires expertise, experience and respect for the watch and its owner. At The Watchmaker in Thessaloniki, my philosophy is to treat each watch as a unique work of art. And that is exactly what I did with this Hublot: full technical maintenance combined with restoration of its exterior, so that it continues to measure time with reliability and elegance.