How Often Should You Service a Mechanical Watch?

A mechanical watch should be serviced roughly every five to seven years. That interval exists because of a few microscopic drops of oil. They sit between hardened steel pivots and synthetic ruby bearings, and they do not last forever. Over time they thin, spread and dry, the mainspring loses its snap, and steel starts grinding on steel where it should be gliding. A service gets in ahead of that.

• Interval: five to seven years for most automatics; sooner for vintage or heavily worn pieces.
• Cost: a real fraction of the watch, because it is hours of skilled bench work.
• Skip it long enough and you pay for worn parts instead of a clean and re-oil.

What actually happens on the bench

People imagine a service is a quick clean. It is not. A watchmaker strips the movement to loose components, and the caseback comes off to a tray of screws, wheels, jewels and springs no larger than a grain of rice. From there:

• Every part is cleaned ultrasonically to lift old oil, dried grease and metal dust.
• Each friction point is re-oiled with the correct grade of lubricant. The oil on a fast-moving escapement pivot is not the oil on a slow-turning barrel arbor.
• The movement is reassembled, then regulated on a timing machine across several positions so it holds accuracy whether it sits dial-up on a nightstand or crown-down on your wrist.
• Gaskets are replaced, the case is resealed, and the whole thing goes through a pressure test before it leaves.

That is why the bill looks the way it does. You are not paying for parts. You are paying for a trained pair of hands to do all of that without a single speck of dust getting back inside.

Why five to seven years, and not ten

Modern synthetic oils are excellent, far better than the natural oils of decades past, but they still degrade. The recommended window is set around how long those lubricants stay where they belong before capillary action pulls them away from the jewels. Run a movement dry and the escapement wears fast, because that is the busiest part in the watch, ticking several times a second every second it runs. Replacing a worn escape wheel or pallet fork costs a great deal more than the service that would have prevented it.

Does the number change by watch?

It does. A plain three-hand automatic with a current-generation movement will often reach the far end of that window without complaint. A chronograph has more going on, more pivots, more to lubricate, and I would see it sooner. Vintage pieces, anything worn daily in heat, and watches that live in humidity all earn a shorter leash. If you genuinely do not know, five years is the honest default.

Signs you should not wait for the calendar

Book it early if you notice any of these:

• Timekeeping drifts by more than a minute a day, either fast or slow.
• A fully wound automatic used to run through the night and now stops by morning. That is falling power reserve, and it usually means friction.
• Fogging or moisture under the sapphire crystal. Stop wearing it and get it seen quickly.
• Winding feels gritty, or the rotor sounds rough as you move.
• The seconds hand stutters instead of sweeping cleanly.

Stretching the interval honestly

Good habits genuinely add time between services. Keep the watch away from strong magnets, laptop speakers and magnetic clasps, since magnetism will throw the rate off long before wear does. Screw the crown down fully and leave the caseback to the watchmaker. If you rotate several automatics, a winder keeps the oils from settling in one spot. The rest of the routine is in our guide to caring for an automatic watch.

The watches we sell are serviced and pressure-tested before they ship. Have a look at the automatic and mechanical collection, browse the wider watch guides, or see how a movement is built in movements explained.

Common questions

Can I get away with ten years?

Often the watch keeps ticking, which is exactly what makes people risk it. But ticking is not the same as running well. By year ten the oils are long gone and wear has usually begun. The repair bill is the price of the gamble.

My watch sits in a drawer. Does it still need servicing?

Yes. Oils age on the calendar, not just on the wrist. A watch stored untouched for years should still be serviced roughly on schedule.

What about quartz?

Different animal. Quartz wants a battery every few years, a gasket check, and the occasional clean. The five-to-seven-year rule is strictly a mechanical concern.

Will a service hurt a vintage watch's value?

Only a careless one will. A sympathetic watchmaker preserves original parts and returns anything replaced to you. Insist on that, and a service protects value rather than eroding it.