Reviving Your Timepiece: A Comprehensive Guide to Fixing an Overwound Clock
Clocks are intricate mechanisms that require regular care and maintenance to keep them ticking accurately. One common issue that clock owners face is an overwound clock, where the mainspring is too tightly coiled, causing the clock to run too fast or not at all. This article will guide you through the process of fixing an overwound clock, ensuring your timepiece is back in working order in no time.
Understanding the Mainspring
The mainspring is the power source of a mechanical clock. It's a thin, flat spring that stores energy when wound and releases it slowly to power the clock's movement. Overwinding occurs when the mainspring is wound too tightly, causing it to release energy too quickly and leading to various issues.
Symptoms of an Overwound Clock
- Running Too Fast: The clock's hands move too quickly, causing the clock to gain time rapidly.
- Not Running at All: In severe cases, the mainspring can become so tight that it prevents the clock from running, even when fully wound.
- Wheels Slipping: The clock's wheels may slip, causing the clock to run erratically or stop suddenly.
Fixing an Overwound Clock
Before you begin, ensure you have the necessary tools. You'll need a clock movement key (or a pair of tweezers in a pinch), a clock winder, and patience. Here's a step-by-step guide to fixing an overwound clock:

Unwind the Clock
First, carefully unwind the clock using the clock movement key or tweezers. Turn the key or use the tweezers to gently pull the arbor (the central shaft) outwards, releasing the tension in the mainspring.
Check the Mainspring
Once the clock is unwound, check the mainspring. If it's still tightly coiled, you may need to unwind it further. Be careful not to unwind it too much, as this can also cause issues.
Rewind the Clock
Now, carefully rewind the clock. Start slowly, allowing the mainspring to build up tension gradually. Keep an eye on the clock's hands to ensure they're moving smoothly and at the correct speed.

Adjust the Clock
If your clock has a pendulum, you may need to adjust its length to ensure it's swinging correctly. Consult your clock's manual for specific instructions, as the process can vary depending on the clock's make and model.
Preventing Overwinding in the Future
To prevent your clock from being overwound in the future, it's important to wind it regularly and not too tightly. Here are some tips:
- Wind your clock once a week, or as recommended by the manufacturer.
- Wind it only until you feel resistance, then stop. Do not force the key or tweezers.
- If your clock has a power reserve indicator, wind it when the indicator reaches the 'wind' position.
When to Seek Professional Help
While many clock issues can be fixed at home, some problems require professional attention. If your clock is still not running correctly after following these steps, or if you're unsure about any part of the process, it's best to consult a professional clock repair service.
Fixing an overwound clock is a straightforward process that can be done with the right tools and a little patience. By following this guide, you'll have your clock ticking accurately in no time. Happy clock fixing!