Rolex Spring Bars – Overview, Types, and Fitment
Rolex spring bars are precision-engineered components that secure the bracelet or strap to the watch case. Although small, they are crucial for durability, fit, and safety. Rolex uses specific diameters, lengths, and shoulder styles depending on the model, case size, and bracelet type.
1. Key Characteristics of Rolex Spring Bars
| Feature | Description |
|---|---|
| Material | Typically stainless steel or 904L-grade steel (to match case material) |
| Diameter | Commonly 1.5 mm, 1.8 mm, or 2.0 mm, depending on lug hole size |
| Length | Varies by lug width: typically 19 mm, 20 mm, or 21 mm |
| Shoulder Type | Standard shoulder, double-flange, or shouldered for drilled-lug cases |
| Tip Design | Blunt or pointed (to match drilled or non-drilled lugs) |
2. Common Rolex Spring Bar Sizes by Model
| Model Type | Lug Width | Spring Bar Length | Diameter | Notes |
|---|---|---|---|---|
| Submariner (modern, no holes) | 20 mm | 20 mm | 1.8 mm | Thick bars for added strength |
| Submariner (vintage, lug holes) | 20 mm | 20 mm | 2.0 mm | Pointed tips, fits drilled lugs |
| Datejust 36 | 20 mm | 20 mm | 1.5 mm | Standard bars |
| Explorer 1016 | 20 mm | 20 mm | 1.8–2.0 mm | Vintage variants use thicker, pointed spring bars |
| Oyster Perpetual 34 | 19 mm | 19 mm | 1.5 mm | Smaller case and thinner bar |
| GMT-Master 1675 | 20 mm | 20 mm | 2.0 mm | Must match vintage case hole depth |
| Lady-Datejust | 13 mm | 13 mm | 1.3 mm | Small size, delicate spring bars |
3. Types of Spring Bars
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Standard Shouldered: Used with drilled lugs for easy removal via spring bar tool.
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Fat Spring Bars: Found on professional models (e.g. Submariner, Sea-Dweller), typically 2.0 mm in diameter for increased strength.
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Flush-End (no shoulder): Used on solid end link (SEL) bracelets, requiring special tools or removal from the bracelet side.
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Double-Flange: Used on some modern models for easier removal on non-drilled lugs.
4. OEM vs. Aftermarket
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OEM Rolex spring bars are precisely manufactured with correct tension and fit. They are model-specific and often marked (e.g. with numbers or dot codes).
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Aftermarket bars may vary in steel quality or diameter, which can compromise security or cause damage to the lugs.
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For vintage watches, finding correct OEM spring bars is critical for safe wear and historical accuracy.
5. Tips for Handling and Maintenance
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Always use a proper spring bar tool (e.g. Bergeon 6767 or 6825) to avoid scratching lugs.
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Inspect spring bars regularly for signs of rust, bending, or weak tension.
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Replace bars every few years, especially on vintage watches or dive models exposed to saltwater.
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If swapping bracelets or straps, use the correct size and tip style to prevent accidental disconnection.
Conclusion
Rolex spring bars are small but essential components engineered for security, precision fit, and longevity. Whether you're fitting a vintage bracelet or a modern Oysterflex strap, always choose the correct size, diameter, and shoulder style. For authenticity and safety—especially with high-value watches—use original Rolex spring bars or high-grade Swiss equivalents.
