How to Unmagnetize a Mechanical Watch That Is Running Too Fast?

Has your mechanical watch started gaining several minutes per day out of nowhere? You set the time before bed, and by morning, it is already five or ten minutes ahead.

This is frustrating, especially if you rely on your watch for accurate timekeeping. But take a deep breath. Your watch is most likely magnetized, and this is one of the easiest problems to fix in the entire world of watch ownership.

Magnetism is the silent enemy of mechanical watches. You cannot see it. You cannot feel it. But it quietly disrupts the tiny metal components inside your watch movement.

Key Takeaways

• Magnetism is the most common reason a mechanical watch suddenly runs fast. The hairspring inside the movement is especially sensitive to magnetic fields. When it gets magnetized, its coils stick together, shortening its effective length and making the balance wheel oscillate faster than it should. This directly causes your watch to gain time rapidly.
• You can test for magnetism at home with a simple compass. Place a compass on a flat surface, let the needle settle, and slowly bring your watch close to it. If the compass needle swings toward your watch, the movement is magnetized. Smartphone compass apps can also work, though they tend to be less reliable.
• A watch demagnetizer tool costs around $15 to $20 and solves the problem in seconds. These small devices generate an alternating magnetic field that neutralizes the magnetic charge inside your watch. They are widely available from online retailers and are simple to operate.
• Professional watchmakers can also demagnetize your watch quickly and affordably. If you are uncomfortable doing it yourself, any reputable watch repair shop can handle this in minutes. They also have timegraphers to verify your watch is running accurately afterward.
• Prevention is straightforward. Keep your watch away from smartphones, laptops, tablets, magnetic phone cases, wireless chargers, speakers, and refrigerator magnets. Store your watches in a dedicated spot that is free from electronic devices.
• Magnetism does not cause permanent damage to your watch. Once you remove the magnetic charge, your watch will return to normal operation. There is no lasting harm to the movement or its components.

Why Does a Mechanical Watch Become Magnetized

Mechanical watches contain tiny metal parts made of steel. The hairspring, escapement, and balance wheel are particularly vulnerable to magnetic fields. Modern life surrounds us with sources of magnetism that our grandparents never dealt with.

Smartphones have magnets inside them. Laptop speakers generate magnetic fields. Wireless chargers, tablet covers, refrigerator doors, and even some handbag clasps carry magnets strong enough to affect a watch.

Your watch does not need to touch a magnet directly. Simply resting your wrist near a laptop speaker or placing your watch on top of a tablet overnight can be enough.

The magnetic field penetrates the case and reaches the movement inside. Some watch straps even use magnetic clasps, which can slowly magnetize a movement over weeks of daily wear.

The steel components inside the movement absorb this magnetic energy. Once magnetized, these parts retain the charge even after you move the watch away from the source. This is what causes the ongoing timekeeping problems.

How Magnetism Makes Your Watch Run Fast

The hairspring is the heart of a mechanical watch’s timekeeping. This thin, coiled metal spring controls the speed of the balance wheel’s oscillation. Each oscillation determines how fast the watch’s hands move. The hairspring is precisely calibrated at the factory so the balance wheel beats at the correct rate.

When a magnetic field reaches the hairspring, its individual coils begin to attract each other. They stick together at certain points, which effectively shortens the spring. A shorter hairspring means the balance wheel completes each oscillation faster. Faster oscillation means the watch hands move more quickly than they should.

This is why a magnetized watch almost always runs fast rather than slow. A severely magnetized watch can gain several minutes per day, sometimes even more. In rare and extreme cases, the entire escapement can lock up, causing the watch to stop completely.

How to Tell if Your Watch Is Magnetized

The first clue is sudden and significant time gain. If your watch was running accurately last week and now gains five or more minutes per day, magnetism is the likely cause. This kind of dramatic change almost always points to magnetism rather than a mechanical fault.

The compass test is the most reliable way to confirm. Place a standard compass on a flat surface and wait for the needle to settle pointing north. Now slowly bring your watch within an inch of the compass. If the needle follows your watch as you move it around, your movement is magnetized. The stronger the needle’s reaction, the stronger the magnetization.

You can also use a smartphone compass app for this test. Open any compass app on your phone, set it on a table, and move the watch near it. Watch the heading display for significant changes. Be aware that this method is less precise because phones themselves contain magnets that can interfere with the reading.

Some watch enthusiasts use a timegrapher to measure the exact rate of their watch. A magnetized watch will show an abnormally high rate, sometimes hundreds of seconds per day fast. This tool gives you precise numbers, but it is not necessary for a basic diagnosis.

Using a Watch Demagnetizer Tool at Home

A watch demagnetizer is a small, affordable device that creates an alternating magnetic field. This field neutralizes the magnetic charge inside your watch movement. The process is safe, quick, and effective. You can find these tools at most online retailers for around $15 to $20.

There are two common designs. The flat pad style has a smooth surface where you place or hold your watch. The coil style has a circular opening that you pass the watch through. Both work on the same principle and deliver the same results. Choose whichever design feels easier to handle.

Before you begin, stop your watch movement. If your watch has a hacking seconds function, pull the crown out to stop the seconds hand. If it does not hack, let the power reserve run down completely before using the demagnetizer. Running the demagnetizer on an active movement can produce inconsistent results.

Clear your workspace. Move other watches, metal tools, and electronic devices at least a few feet away. The demagnetizer creates a magnetic field during operation, and you do not want to accidentally magnetize something else.

Step by Step Demagnetization Process

For a flat pad demagnetizer, hold your watch face down just above the smooth surface. Rest your fingertips on the device for stability, keeping the watch case slightly elevated above the pad. This small gap improves results.

Press and hold the power button with your other hand. The indicator light will turn on. Now slowly lift the watch straight up and away from the demagnetizer in one smooth, continuous motion. Do not jerk the watch away quickly. The slow, steady movement is the most important part of the entire process.

Continue lifting until the watch is about 12 inches or 30 centimeters above the device. At this point, release the power button. You have completed one demagnetization cycle. The entire motion should take about five to ten seconds.

For a coil style demagnetizer, turn on the device and pass the watch through the opening one or two times slowly. Then withdraw the watch in the same slow, steady motion described above.

After completing a cycle, test with a compass again. If the needle still reacts to your watch, repeat the process. Most watches are fully demagnetized after one or two passes.

Why the Slow Pull Away Matters

This is the detail that many people get wrong. The demagnetizer works by creating a rapidly alternating magnetic field. As you move the watch away slowly, the strength of that field decreases gradually. This gradual decrease is what actually strips the magnetism from the movement’s components.

Each alternating cycle flips the magnetic polarity of the metal parts. As the field strength decreases, the flips become weaker and weaker until the residual magnetism is essentially zero. This is the same principle used in professional degaussing equipment.

If you pull the watch away too fast, you cut this process short. The metal components may still retain a magnetic charge because they did not experience enough weakening cycles. You end up right back where you started, or sometimes even worse. Patience during this single step makes the difference between success and failure.

DIY Methods Without a Demagnetizer

If you do not own a demagnetizer and need a quick fix, there are a few alternative approaches. Some watch enthusiasts have reported success using an electric soldering iron’s transformer or a bulk tape eraser. These devices generate alternating magnetic fields similar to a dedicated demagnetizer.

Another creative method involves using a strong AC electromagnet. You hold the watch near the active electromagnet and slowly pull it away, just like using a proper demagnetizer. However, this requires access to specific equipment and some electrical knowledge.

Pros of DIY methods: They can work in a pinch when you do not have the right tool. They cost nothing if you already own the equipment.

Cons of DIY methods: They carry a higher risk of incomplete demagnetization. They may introduce a stronger magnetic field than necessary, potentially making the problem worse. They are not calibrated for watch movements. For most people, spending $15 on a proper demagnetizer is a better and safer choice.

Taking Your Watch to a Professional Watchmaker

A professional watchmaker can demagnetize your watch in minutes using commercial grade equipment. This is the safest option for expensive or sentimental timepieces. Most watch repair shops charge a modest fee for this service, often between $10 and $30.

The added benefit of visiting a professional is access to a timegrapher. After demagnetizing your watch, the watchmaker can measure its accuracy and verify that it is running within acceptable parameters. If demagnetization alone does not solve the problem, the watchmaker can diagnose other potential issues like a damaged hairspring or a movement in need of servicing.

Pros of professional service: Expert handling, accurate diagnosis, access to precision testing equipment, and peace of mind for valuable watches.

Cons of professional service: It requires a trip to the shop. Availability may be limited depending on your location. It costs more than doing it yourself. For a simple magnetism issue, you are paying for a service you could perform at home in under a minute.

Comparing Demagnetizer Tool vs Professional Service

Choosing between a home demagnetizer and a professional visit depends on your comfort level and the value of your watch. A demagnetizer tool is a one time purchase that pays for itself after a single use. It lives in your toolbox forever and handles every future magnetism issue instantly.

A professional service makes more sense if you own a single high value watch and rarely encounter magnetism problems. The watchmaker provides certainty that the job is done right and can spot other issues you might miss.

For watch collectors or enthusiasts who own multiple mechanical watches, a demagnetizer is practically essential. Magnetism is common enough that you will encounter it again. Having the tool ready saves time and money over repeated shop visits. Most experienced collectors consider it one of the first tools to buy.

How to Prevent Your Watch from Getting Magnetized

Prevention is simpler than you might expect. The key habit is keeping your watch away from magnetic sources during storage and daily wear. Designate a storage spot on your dresser or nightstand that is at least 6 to 12 inches away from your phone, tablet, or laptop.

Do not place your watch directly on top of electronic devices. A tablet’s built in magnets (especially in smart covers) are strong enough to magnetize a movement overnight. The same applies to laptop keyboards, which contain magnets for closing the lid.

Be cautious around wireless charging pads, Bluetooth speakers, refrigerator magnets, and magnetic phone mounts in your car. These are everyday items that produce fields strong enough to affect a watch.

If your profession exposes you to strong magnetic fields regularly, consider a watch with enhanced magnetic resistance. Some modern movements use silicon hairsprings and non ferrous components that resist magnetism up to thousands of gauss. Brands like Omega, Rolex, and others offer movements specifically designed for high magnetic environments.

Watches with Built in Magnetic Resistance

The watch industry has developed impressive solutions for magnetism over the decades. Omega’s Master Chronometer movements resist magnetic fields up to 15,000 gauss. This level of protection makes magnetism from everyday objects virtually irrelevant.

Rolex uses its Parachrom hairspring, made from a niobium and zirconium alloy that is highly resistant to magnetic fields. This material also offers improved shock resistance and temperature stability.

Other brands use silicon hairsprings, which are completely non magnetic. Since silicon is not a metal, it cannot be magnetized at all. This technology has become increasingly common across various price points in recent years.

If magnetism is a recurring concern for you, investing in a watch with anti magnetic technology is a long term solution. These watches eliminate the root cause rather than requiring you to fix the symptoms repeatedly. However, they tend to cost more than standard mechanical watches.

Common Mistakes to Avoid During Demagnetization

The biggest mistake is pulling the watch away from the demagnetizer too quickly. As discussed earlier, the slow withdrawal is critical. Take at least five seconds to move the watch from the device to full arm’s length above it.

Another common error is forgetting to stop the movement before demagnetizing. An active movement with spinning gears can respond unpredictably to the alternating magnetic field. Always stop the watch first.

Do not place your watch back on the demagnetizer after completing a cycle. The device itself is essentially an electromagnet, and resting the watch on it will reintroduce magnetism immediately. Set the watch on a separate, clean surface.

Finally, do not forget to clear the area around the demagnetizer. Other watches, metal tools, or steel objects nearby can become magnetized during the process. Give yourself a clean workspace with at least two feet of clearance around the device.

When Demagnetization Does Not Fix the Problem

If your watch still runs fast after thorough demagnetization, the issue may not be magnetism alone. A damaged or distorted hairspring can cause similar symptoms. Drops, impacts, or aging can affect the hairspring’s geometry and change the watch’s rate.

The movement may also need a full service. Over time, lubricants dry out, components wear, and debris accumulates inside the movement. These factors can cause timing irregularities that demagnetization will not resolve.

In rare cases, a watch may have been exposed to an extremely strong magnetic field that caused the hairspring coils to become permanently stuck or damaged. A watchmaker will need to inspect the movement and potentially replace the hairspring. If basic demagnetization does not bring your watch back to normal accuracy, a professional evaluation is the right next step.

Frequently Asked Questions

Can magnetism permanently damage a mechanical watch?

No. Magnetism does not cause permanent damage to a mechanical watch in the vast majority of cases. The magnetic charge is fully removable through demagnetization. Once the charge is gone, the watch returns to its normal accuracy. Only in extremely rare cases of very strong magnetic exposure could physical damage occur to delicate components like the hairspring.

How often should I demagnetize my watch?

There is no fixed schedule. You should demagnetize your watch whenever you notice sudden and significant time gain or when a compass test confirms magnetization. Some collectors do a quick demagnetization pass on their entire collection every few months as preventive maintenance. This is perfectly safe and takes just seconds per watch.

Can a quartz watch get magnetized too?

Yes, quartz watches can be affected by magnetism. The small stepper motors that drive the hands are sensitive to magnetic fields. However, the effect on a quartz watch is usually temporary. Once you remove the watch from the magnetic source, it typically returns to normal operation on its own without needing a demagnetizer.

Will a phone case with a magnet magnetize my watch?

It can. Magnetic phone cases and MagSafe compatible accessories contain magnets strong enough to magnetize a watch movement. Avoid placing your watch directly on top of or next to your phone, especially if it has a magnetic case or mount attached. Even brief contact can introduce enough magnetism to affect timekeeping.

Is it safe to demagnetize a watch at home?

Yes. Home demagnetization is safe and widely practiced by watch enthusiasts around the world. The process involves no disassembly and poses no risk to the watch case, crystal, or movement. Just follow the proper technique of slowly pulling the watch away from the device, and you will get clean results every time.

Do anti magnetic watches ever need demagnetization?

Watches with strong anti magnetic properties, such as those with silicon hairsprings or specially shielded movements, are highly resistant to everyday magnetic sources. They rarely need demagnetization under normal conditions. However, exposure to extremely powerful industrial magnets could still potentially affect even these watches, though this is uncommon in daily life.