The watch spring bar, also called a pump bar, is the small component that holds the strap to the case. Choosing the right one is the key to keeping your watch safely on your wrist.
\n\nMeasuring the spring bar you need
\nTwo dimensions to know:
\n- Lug-to-lug width: the distance between the two lugs of the case (10 to 28 mm).
- Body diameter: 1.3 to 2.0 mm on most watches.
The types of spring bars
\nStandard double-shoulder spring bar
\nThe benchmark: our stainless-steel double-shoulder spring bar fits 80 % of watches.
\nQuick-release spring bar
\nFitted with a side lever, it lets you swap straps without any tool: see the quick-release lever spring bar.
\nRolex-specific spring bar
\nSome Rolex models have drilled lugs: use the Rolex-compatible spring bar in the exact length.
\nMaterials and strength
\n| Material | Strength | Use |
|---|---|---|
| 316L stainless steel | High | Standard, diving |
| Plain steel | Medium | Dress watches |
| Titanium | High, lightweight | Sport watches |
Fitting
\n- \n
- Compress the spring bar with a positioning awl. \n
- Insert one end into the lug. \n
- Compress the other end and guide it into place. \n
- Check that the spring bar is fully seated on both sides. \n
« An undersized spring bar means a strap that falls off at the worst possible moment. »\n
FAQ
\nHow do I find the lug width of my watch?
Use a caliper to measure between the two lugs, or check the model's technical sheet.
\nCan a spring bar wear out?
Yes, the inner spring tires over time; replace it every 3 to 5 years with daily wear.
\nSteel or titanium spring bar?
316L steel for 95 % of cases; titanium for very lightweight sport watches.
\nAre there waterproof spring bars?
The spring bar itself is not waterproof: water resistance comes from the case-back and crown gaskets.
\n