Don't know how to measure a watch pump? Don't worry! This guide explains exactly where and how to take the measurements to replace your watchband or its clasp. Knowing the exact length of the pump is essential to ensure a perfect fit and avoid any malfunction with your watch case. Follow our easy-to-follow recommendations and choose the right pump for your watchband.
What is a watch pump?
The watch pump, also known as a barrette, is an essential component that connects the bracelet to the watch case. It consists of a metal tube with an internal spring that pushes the ends outwards. Depending on the model, these ends may be equipped with grooves for better attachment to the case lugs. Watch pumps come in different sizes and widths, depending on the type of strap (leather, steel, silicone) and watch (analog, connected, sport, classic). Knowing the exact pump size is crucial to avoid mistakes when replacing your watch strap.
How do I measure a watch pump?
To choose the right watch pump, it's essential to measure the case lugs. The lugs are the distance between the two lugs of the case. This measurement in millimeters determines the size of pump you need. For example, a watch with a 20 mm lugspan will require a 20 mm watch pump for perfect attachment. Use a tape measure, ruler or caliper to measure precisely. Note that the length of the pump is always measured from one end to the other, excluding elements such as the central spring.
Diagram explaining the watch pump and measuring method.
If you'd like to know the exact length of your pump without measuring the lugs, you can measure it directly. To do this, take the measurement between the pump's grooves, which correspond to where it will be inserted into the lugs. This step requires a certain amount of skill, especially if you're using specialized watchmaking tools such as a setting punch or watch tongs.
Recommendations for pump selection
For a successful replacement, choose your pump according to the specific features of your watch:
- Sports watches: opt for robust stainless steel pumps to withstand shocks and perspiration.
- Classic watches: opt for slim, discreet pumps, especially for models with leather straps.
- Connected watches: Make sure you choose a pump compatible with the curvature of the case and the width of interchangeable bracelets.
Useful accessories for measuring and replacing pumps
To measure or replace a watch pump, we recommend the use of watchmaking accessories such as a setting punch or a strap change kit available on our site. Visit our Watch Accessories section to discover our selection of watchmaking tools and repair kits suitable for all watches.
By following this guide, you'll avoid common mistakes when replacing your bracelet or clasp, and be able to maintain your timepiece with ease. Whether your watch is made of stainless steel, genuine leather or silicone, precise measurements guarantee perfect compatibility with the dial and bracelet. If you own a connected watch such as an Apple Watch or Samsung smartwatch, be sure to also check the width and length of the interchangeable pumps.
Conclusion and advice
Correct measurement of the watch pump is essential to ensure a secure fit of the bracelet and avoid any risk of it becoming detached from the case. Whether your watch is a sports watch or a luxury timepiece, precise measurement ensures a secure fit. Use a tool such as a needle to carry out the assembly, and opt for stainless steel pumps for greater durability.
Find all our watch pumps in our online boutique, as well as other watchmaking accessories, such as leather straps, clasps or pin buckles. Whether you're looking for a sports watch, a classic watch or a connected watch, we have everything you need to maintain and personalize your timepiece. Don't wait any longer and discover our products today!