Watch Terms & Components

What is the mainspring in a watch?

The mainspring is a coiled spring inside a watch that provides the power to drive the watch movement.. The mainspring is typically made of a thin strip of steel or other high-tensile material that ha…

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What is a stem on a watch?

The stem is a small, cylindrical metal piece attached to the crown that is used to wind and set the time on a watch. It is typically located on the side of the watch case and is connected to the watc…

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What is a hairspring in a watch?

A hairspring, also known as a balance spring, is a thin, coiled spring in a mechanical watch that is used to regulate the movement of the watch's balance wheel. The hairspring is typically made of a…

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What are the lugs on a watch?

Lugs are the small, protruding pieces on either side of a watch case that hold the watch band or bracelet in place. The lug width is the distance between the lugs and is an important measurement to k…

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What is the crown on a watch?

The crown is a small knob or button located on the side of a watch case that is used to wind the watch, set the time, and adjust various other functions. The crown is typically located at the 3 o'clo…

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What is the dial on a watch?

The dial, also known as the face, is the part of a watch that displays the time and other information such as the date, day of the week, or other functions.. The dial is typically located in the cent…

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What is a pallet fork in a watch?

A pallet fork is a component of the escapement in a mechanical watch that is responsible for releasing the energy stored in the watch's mainspring and regulating the movement of the watch's gears and…

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What is lume on a watch?

Lume, short for "luminous material," is a type of phosphorescent substance that is applied to the hands, markers, and/or dials of a watch to make them visible in low-light conditions. Lume is typical…

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What is a balance wheel in a watch?

The balance wheel is a critical component of a mechanical watch movement that helps regulate the accuracy of the watch's timekeeping.. The balance wheel is a circular wheel with a small weighted rim,…

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What is an escapement in a watch?

An escapement is a mechanism in a mechanical watch that controls the release of energy from the watch's mainspring and regulates the movement of the watch's gears and hands.. The escapement consists…

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What is the rotor in a watch?

The rotor is a part of an automatic watch movement that is responsible for winding the mainspring, which powers the watch.. The rotor is a semi-circular weight that is mounted on a pivot and rotates…

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