Basic Elements › Machines & Tools

LUBRICANTS

Lubrication is an essential operation in watchmaking. Without it, friction between mechanical parts leads to premature wear and rate variations.

There are two main families of lubricants: oils, which are fluid and light, and greases, which are more viscous and stable. Each lubrication point of a Movement requires a specific lubricant, chosen according to the nature of the contact and the mechanical stresses involved.

Oils are used on pivots, bearings and the trains. Their low viscosity allows precise flow in very small quantities. Greases are better suited to surfaces subject to high pressure, such as cams and levers of the Winding mechanism.

The amount applied is as important as the choice of product. An excess of lubricant attracts dust and can migrate to sensitive areas. An insufficient amount does not provide the necessary protection.

Watchmaking lubricants are formulated to withstand aging, temperature variations, and light loads. Their lifespan is limited, which justifies periodic servicing of the movement, generally every three to five years depending on the calibre.

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OILS

Oils are fluid lubricants applied in tiny amounts on the bearings, the pivots and the Train (wheel train). Their low viscosity ensures precise flow and minimal friction. They are notably essential to the proper functioning of the finishing Train (wheel train), of the regulating organ and the escapement.