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This is a genuine pallet fork designed for the Omega Caliber 3303 and 3313 automatic chronograph movements, with part number 722330340010. The pallet fork is a core component of the Co‑Axial escapement system, working with the co‑axial wheel to transmit power from the gear train to the balance wheel and control the regular release of energy.
As an original factory part, it is the ideal choice for replacing a pallet fork detected to be worn or damaged during service or repair.
| Feature | Description |
|---|---|
| Compatible Movements | Omega Caliber 3303 A/B, 3313 A/B |
| Part Number | 722330340010 |
| System | Co‑Axial Escapement |
| Core Function | Transmits power from the escape wheel to the balance wheel, controlling regular energy release |
| Technical Feature | In Co‑Axial design, both the pallet fork jewels and co‑axial wheel teeth have sharper profiles – prone to wear |
| Material | High-precision steel with synthetic ruby pallet stones |
| Product Type | Genuine Omega part |
Omega Caliber 3303 / 3313 Technical Background :
| Parameter | Caliber 3303 | Caliber 3313 |
|---|---|---|
| Movement Type | Automatic chronograph | Automatic chronograph |
| Escapement | Traditional lever | Co‑Axial |
| Diameter | 12‴ / 27.00 mm | 12‴ / 27.00 mm |
| Thickness | 6.85 mm | 6.85 mm |
| Jewels | 37 | 37 |
| Power Reserve | 52 hours | 52 hours |
| Frequency | 28,800 vph (4 Hz) | 28,800 vph (4 Hz) |
Co‑Axial Escapement Design Features :
Co‑axial wheel teeth come to a very fine point; pallet fork jewels are also sharper
Compared to traditional lever escapements, co‑axial teeth are more prone to wear
Omega introduced optimizations to these co‑axial components in the 3313 movement
Co‑axial system offers less friction and extended service intervals, but wear is not eliminated
| Instruction | Details |
|---|---|
| Primary Use | As a core component of the Co‑Axial escapement, the pallet fork works with the co‑axial wheel to control regular energy release |
| Normal Function | The pallet fork transmits impulses between the co‑axial wheel and balance wheel, maintaining stable movement operation |
| Failure Symptoms | Worn or damaged pallet fork causes: unstable movement operation, increased time deviation, stopping, unusually low amplitude |
| Co‑Axial Note | Co‑Axial escapement teeth are sharper than traditional designs, making them more prone to wear; worn pallet forks leave “shaved” marks on co‑axial wheel teeth |
1. Remove Automatic Module:Remove the automatic winding module to access the gear train and escapement
2. Remove Balance Wheel:Carefully remove the balance wheel to release escapement tension
3. Remove Old Pallet Fork:Remove the old pallet fork – inspect pallet stones for wear or chipping
4. Clean Mounting Area:Clean the pallet fork mounting area and jewel bearings – remove old oil and debris
5. Inspect Co‑Axial Wheel:Co‑axial wheel teeth are prone to wear – inspect closely; if worn, replace the co‑axial wheel as well
6. Install New Pallet Fork:Place the new pallet fork in position – ensure the fork pivots are properly seated
7. Install Balance Wheel:Reinstall the balance wheel – confirm free oscillation without interference
8. Lubrication & Testing:Co‑Axial escapement requires specialized lubrication in microscopic amounts – test movement stability after installation
Important Note: Co‑Axial escapement installation and lubrication require specialized training and tools. The geometric precision of the pallet stones is critical to movement performance. When replacing the pallet fork, inspect the co‑axial wheel for wear at the same time. Service by an Omega-certified watchmaker is strongly recommended.
| Aspect | Guidance |
|---|---|
| Inspection Period | Inspect pallet stones and co‑axial wheel teeth for wear during each movement service |
| Wear Indicators | Signs of Co‑Axial wear include: “shaved” or chipped co‑axial wheel teeth, unstable movement operation, unusually low amplitude, increased time deviation |
| Inspection Detail | Examine co‑axial wheel teeth under magnification – if each tooth shows a small “shaved” mark on the right side, the pallet fork jewel is typically chipped |
| Cleaning Method | Use specialized cleaning solution and ultrasonic equipment – avoid corrosive cleaners on Co‑Axial components |
| Lubrication | Co‑Axial escapement requires specialized lubricant in microscopic amounts |
| Replacement Interval | Replace components immediately when co‑axial wheel teeth are worn, pallet stones are chipped, or deformation is visible |
| Service Advice | Co‑Axial movements offer extended theoretical service intervals, but wear components (co‑axial wheel, pallet fork) must still be assessed and replaced when necessary |
Q1: Why do co‑axial escapement pallet forks wear out?
A: The Co‑Axial design features very sharp, fine-pointed teeth on the co‑axial wheel. During operation, these sharp teeth pass over sharp pallet fork jewels. Lubrication and reduced friction do not eliminate physical contact entirely, and the fine tips are more vulnerable to wear compared to traditional lever escapements. Some watchmakers report that co‑axial wheels and pallet forks are replaced more frequently than their lever escapement counterparts.
Q2: How do I know if my pallet fork needs replacement?
A: Signs of a worn or damaged pallet fork include: the watch stops intermittently (“stops”), co‑axial wheel teeth show “shaved” marks under magnification (often caused by a chipped pallet stone), unusually low amplitude, inconsistent timekeeping, or metallic friction noise during operation. A qualified watchmaker must inspect the escapement components under magnification.
Q3: Can I service the 3313 co‑axial pallet fork myself?
A: Servicing a Co‑Axial escapement is highly specialized. Omega requires certified technicians to use specific surface treatment (Epilame) on the pallet fork and other components. The cleaning and lubrication procedures for the 3313 differ significantly from traditional movements. Professional service by an Omega-certified watchmaker is strongly recommended.
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