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The Rolex Calibre 2235-315 Barrel Complete (also designated as Ref. No. 2230-315) is a pre-assembled, genuine OEM replacement component containing the mainspring, barrel, and barrel arbor as a single integrated unit, designed for the Rolex Calibre 2235 automatic movement and its no‑date variant Calibre 2230. Engineered and manufactured in Switzerland, this barrel complete serves as the primary energy storage and release system for the movement, converting the kinetic energy generated by the oscillating weight into the controlled power that drives the entire gear train.
As a drop‑in replacement part, it offers professional watchmakers a reliable, cost‑effective solution for restoring worn or damaged original barrels, eliminating the need for mainspring re‑greasing or recalibration during routine servicing.
Complete integrated assembly – Supplied as a pre-assembled unit containing mainspring, barrel, and barrel arbor (2230-311), eliminating the need for separate component handling during service
48-hour power reserve – The mainspring stores approximately 48 hours of energy when fully wound, providing ample reserve for daily wear
Swiss OEM manufacturing – A genuine Rolex factory part, manufactured in Switzerland to original specifications, ensuring perfect fit and reliable performance
Movement‑specific design – Engineered specifically for the compact 20 mm diameter Calibre 2235 and Calibre 2230 movements, with all internal clearances and torque characteristics factory‑optimized
Drop‑in replacement fit – Engineered as an exact-match substitution for worn, damaged, or missing original barrel assemblies, requiring no modification or recalibration
| Parameter | Value |
|---|---|
| Part Number / Ref. | 2235-315 / 2230-315 |
| Manufacturer / Brand | Rolex (Genuine OEM) |
| Country of Manufacture | Switzerland |
| Component Type | Barrel Complete (Mainspring Barrel with Arbor) |
| Included Components | Barrel, mainspring, barrel arbor (No. 2230-311) |
| Material (Barrel) | Stainless steel |
| Compatible Calibers | Rolex Calibre 2235, Calibre 2230 |
| Movement Diameter | 20.0 mm (Calibre 2235) |
| Movement Height | 5.95 mm (Calibre 2235 with date) |
| Jewels | 31 |
| Power Reserve | Approx. 48 hours |
| Frequency | 28,800 vph (4 Hz) |
| Shock Protection | Kif Elastor |
| Hairspring | Breguet overcoil |
| Certification | COSC Swiss Chronometer |
| Unit Quantity | 1 piece per order |
Replacement of worn, damaged, or fatigued barrel assemblies during professional servicing of Rolex Calibre 2235 and 2230 movements, including Lady-Datejust, Datejust 31, Yacht‑Master 29, and Yacht‑Master 35 models
Restoration of movements with reduced power reserve, poor amplitude, or irregular power delivery resulting from mainspring fatigue, barrel wall wear, or old lubrication breakdown
Watch repair workshops and authorized service centers performing full movement overhauls where the barrel is routinely replaced in accordance with Rolex factory service guidelines
Q1: Is this barrel complete an authentic genuine Rolex part or a generic aftermarket product?
This is a 100% genuine Rolex OEM part (Ref. No. 2235-315 / 2230-315), manufactured in Switzerland to original factory specifications. It is not a generic or aftermarket product. Each unit is produced under Rolex‘s strict quality control and is identical to the component originally fitted in Calibre 2235 and 2230 movements. Seller listings confirm this part is marketed and sold as “ROLEX ORIGINAL PART” in sealed packaging.
Q2: Which Rolex watch models and calibers is this part compatible with?
This barrel complete is designed for Rolex Calibre 2235 (found in Lady-Datejust 26, Datejust 31, Yacht‑Master 29, and Yacht‑Master 35 models) and Calibre 2230 (no‑date version). It is a direct fit for all movements within the 2235/2230 family and should not be used with Calibre 3135 or Calibre 3235 components, as those use different barrel dimensions and power reserve specifications.
Q3: What is the quality and reliability of this genuine Rolex part?
As a genuine Rolex OEM component manufactured in Switzerland, it fully meets the brand‘s rigorous factory quality standards. The barrel complete is supplied pre-assembled with the correct mainspring pre‑tension and factory‑applied lubrication, eliminating the risk of improper mainspring handling or incorrect grease application—common issues with aftermarket alternatives. Professional watchmakers note that Rolex factory service guidelines recommend complete barrel replacement at each full service to ensure optimal amplitude and consistent power reserve.
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