# Are watch winders bad for automatic watches

Source: https://lumeandbezel.com/blog/are-watch-winders-bad-for-watches
Published: 2026-10-09
Publisher: Lume & Bezel

**Short answer:** A properly set watch winder is not bad for a modern automatic watch. Automatic movements have a slipping clutch that stops the mainspring from being overwound, so extra turns are harmlessly absorbed. The real trade off is that a watch kept running wears its parts as if it were being worn. Use the maker's turns per day and direction, and choose a winder with a low magnetism motor.

Watch winders keep automatic watches running while they sit in a drawer, but many owners worry they might overwind the spring, wear out the movement or magnetize the watch. This page is for anyone thinking about buying a winder, or already using one and wondering whether it is doing harm. It explains how automatic movements protect themselves from overwinding, what the honest wear trade off is, whether winder motors cause magnetism, and the settings that keep a winder gentle on your watch. If you are not sure you need one at all, start with [do you need a watch winder](https://lumeandbezel.com/blog/do-you-need-a-watch-winder).

## Can a winder overwind an automatic watch

No, not in a modern automatic. In a hand wound watch, the end of the mainspring is fixed to the barrel, so you feel a stop when it is fully wound and forcing it further can cause damage. In an automatic, the outer end of the mainspring is attached to a slipping bridle, sometimes called a slipping clutch, that presses against the inside wall of the barrel. Once the spring is fully wound, the bridle slips around the barrel wall instead of winding the spring tighter.

So whether the rotor is turned by your wrist or by a winder, a fully wound automatic simply lets the extra energy slip away. This is the same mechanism that protects the watch when you wear it on a busy day.

## The real trade off: wear vs stop and start

A watch on a winder runs all the time. Every hour it runs, the gear train, escapement and balance work and the oils age, just as they would on your wrist. So a winder does add running hours compared with leaving the watch stopped in a drawer. Over many years that can bring service time forward.

On the other side, letting a watch run down and restarting it means resetting the time, and on watches with a day date, moon phase or perpetual calendar, setting the calendar can be fiddly and risky if done during the change window. A winder avoids that handling. Some watchmakers also argue that oils stay better distributed in a watch that keeps running.

There is no single right answer. For a simple time and date watch you rotate weekly, a winder is mostly a convenience. For a complicated calendar watch, many owners find the reduced handling worth the extra running hours.

|  | On a winder | Left to stop |
| --- | --- | --- |
| Running hours | Continuous, like daily wear | Only when worn |
| Resetting time and date | Not needed | Needed after each stop |
| Crown use | Less | More, which wears the crown gasket and stem |
| Service interval | Closer to a daily worn watch | Can stretch further |
| Best for | Rotations, complications | Simple watches worn occasionally |

Winder vs letting the watch stop

## Do winders magnetize watches

Any electric motor produces some magnetic field, and magnetism is a common cause of a watch suddenly running fast. Well made winders use small, shielded motors and keep the watch at a distance from them. Several winder listings we track address this directly. Heiden, for example, says its Japanese Mabuchi motors are designed with zero magnetization, and other brands advertise similar motors.

If a watch starts gaining several minutes a day after time on a winder, test it with a compass and demagnetize it if needed. Our [magnetized watch fix](https://lumeandbezel.com/blog/magnetized-watch-fix) explains how. Also keep the winder away from speakers, tablets with magnetic covers and other strong magnets.

Note: If a cheap winder repeatedly magnetizes a watch, stop using it. A demagnetizer fixes the watch, but the cause will keep coming back.

## Settings that keep a winder gentle

Most winders let you choose turns per day (TPD) and direction. Listings show typical ranges: Heiden offers 650, 950, 1250 and 1850 TPD; Barrington and Rothwell offer 650, 750, 850, 1000 and 1950; Wolf offers 300 to 1200. The right setting is the lowest that keeps your watch running, in the direction its movement winds. Higher settings are not harmful thanks to the slipping clutch, but they add needless rotor wear.

Many winders also rest between cycles. Barrington's single winder listing, for example, describes running intermittently over 12 hours and resting for 12 hours. Rest cycles mimic a watch taken off at night and keep the mainspring from sitting at full tension all the time. Our [watch winder TPD settings](https://lumeandbezel.com/blog/watch-winder-tpd-settings) guide covers how to find your watch's numbers.

1. Find the TPD and direction for your movement from the maker or a TPD database.
2. Start at that TPD, or the nearest lower setting on your winder.
3. Check after a few days that the watch is still running and on time.
4. Raise TPD one step only if the watch stops.

## Which watches should not go on a winder

When you do want a winder, pick one with adjustable TPD and direction, a quiet motor and a cushion that fits your watch securely. Our [best watch winders](https://lumeandbezel.com/best/best-watch-winders) and [best single watch winders](https://lumeandbezel.com/best/best-single-watch-winders) compare options.

- Hand wound watches: a winder cannot wind them, because they have no rotor.
- Quartz watches: they gain nothing from a winder.
- Some kinetic and other hybrid movements: check the maker's guidance, and note that some winder brands state their products are not compatible with certain hybrid watches.
- Watches that need service: if the watch is already running badly or stopping, a winder will not fix it. See [automatic watch keeps stopping](https://lumeandbezel.com/blog/automatic-watch-keeps-stopping).

## Frequently asked questions

**Should I leave my watch on a winder all the time?** You can if you rotate it often and want it ready to wear. If you will not wear it for months, many owners let it stop instead to save running hours.

**Does a watch winder wear out the rotor?** The rotor and its bearing do wear with use, as they do when worn on the wrist. Using the lowest TPD that keeps the watch running reduces unnecessary rotor turns.

**What happens if the TPD is too high?** The watch winds to full and the slipping clutch absorbs the extra turns. It does not damage a modern automatic, but it adds pointless wear.

**Can a winder fix a watch that keeps stopping?** No. If a fully wound watch stops early, it likely needs service.

## Gear guides for this topic

- https://lumeandbezel.com/best/best-watch-winders
- https://lumeandbezel.com/best/best-single-watch-winders
- https://lumeandbezel.com/best/best-watch-winders-for-luxury-watches