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This is a genuine main plate Incabloc shock protection component designed for ETA 2824, 2834, and 2836 series automatic movements, with part number 2824/2834/2836-3025, Made in Switzerland. The Incabloc shock protection system is a critical component that protects the balance staff pivots by absorbing external impact energy, ensuring stable timekeeping even after shocks.
As an original factory part, this product is the ideal choice for replacing worn or damaged shock components during professional service.
Incabloc Technical Background :
| Parameter | Description |
|---|---|
| System Location | Both ends of the balance wheel (main plate side and balance bridge side) |
| Movement Grade Application | ETA Top and Chronometer grades use Incabloc; Standard and Elaboré grades use Etachocs |
| Balance Frequency | 28,800 vph (4 Hz) |
| Common Applications | Breitling, Longines, TAG Heuer, Mido, Tissot, etc. |
ETA Movement Shock Protection Comparison :
| Movement Grade | Shock Protection System |
|---|---|
| Standard / Elaboré | Etachocs |
| Top / Chronometer | Incabloc |
| Instruction | Details |
|---|---|
| Primary Use | As the main plate side balance shock protection component, prevents external shocks from damaging pivots or jewels |
| Normal Function | Under normal conditions, the shock system maintains precise jewel and pivot alignment for stable timekeeping |
| Failure Symptoms | Damaged shock protection causes: broken balance staff pivots, unstable movement operation, unusually low amplitude, shock-induced stoppage |
| Incabloc Identification | The Incabloc system features a spring ring surrounding the shock setting – appears as a brass-colored ring with spring structure |
ETA Movement Grade Quick Identification :
Incabloc under the balance bridge → Top grade or Chronometer grade
Etachocs under the balance bridge → Standard grade or Elaboré grade
| Step | Instruction |
|---|---|
| 1. Remove Old Component | Remove the balance wheel and balance bridge to expose the main plate side Incabloc setting |
| 2. Remove Shock Setting | Use specialized tweezers to carefully remove the Incabloc shock setting (spring, jewels, and setting) |
| 3. Clean Mounting Hole | Thoroughly clean the mounting hole on the main plate – remove old oil and debris |
| 4. Inspect Jewels | Check the Incabloc jewels for damage, chips, or wear |
| 5. Install New Component | Place the new Incabloc setting into the mounting hole – ensure proper seating |
| 6. Install Spring | Use a specialized tool to install the retaining spring – ensure it snaps into place |
| 7. Lubrication | Apply a microscopic amount of specialized watch oil to the jewel/pivot contact point |
| 8. Testing | After reinstalling the balance wheel, check for free oscillation without interference |
Important Note: Incabloc shock setting removal and installation require specialized tools (such as an Incabloc tool or specialized tweezers). Improper handling may damage the spring or jewels. Professional installation by a watchmaker is recommended.
| Aspect | Guidance |
|---|---|
| Inspection Period | Inspect Incabloc shock setting spring for deformation and jewels for damage during each movement service |
| Wear Indicators | Signs of damage include: broken or worn balance staff pivots, unusually low amplitude, shock-induced stoppage |
| Cleaning Method | Clean shock settings with specialized cleaning solution – do not sonicate jewels for extended periods |
| Lubrication | Apply specialized watch oil (e.g., Moebius 9010) to the jewel/pivot contact point – microscopic amount only |
| Replacement Interval | Replace shock setting if jewel is chipped, spring is deformed, or pivots are worn |
| Service Advice | ETA 28xx series movements should be professionally serviced every 3-5 years |
| Post-Impact Check | After a strong impact, inspect shock settings even if the watch is still running |
Q1: What is the function of the Incabloc system?
A: The Incabloc shock protection system is designed to protect the delicate balance staff pivots from damage when the watch is subjected to an impact. It uses a spring to allow the jewel and pivot to shift under impact, then return to their original position afterward.
Q2: Can I install this Incabloc component myself?
A: Incabloc removal and installation require specialized tools and expertise. If you have experience with watch movement service and the proper tools (Incabloc tool, specialized tweezers), it is possible. However, professional installation by a qualified watchmaker is strongly recommended.
Q3: How do I identify if my movement has Incabloc or Etachocs?
A: Under magnification, Incabloc has a visible spring ring surrounding a brass-colored setting. Etachocs has a simpler appearance without the spring ring, often appearing as a smooth metal ring.
Q4: What other parts should be inspected when replacing the Incabloc?
A: When replacing the main plate side Incabloc, inspect the balance side shock setting at the same time. Also inspect the balance staff pivots for wear or damage, and the balance wheel for truth.
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