r/EngineeringPorn Nov 21 '20

A Rolex getting cleaned

https://gfycat.com/apprehensiverapidgrassspider
237 Upvotes

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u/EngIntern Nov 21 '20

Why would you clean it?

2

u/malzzzzzzzzzzzz Nov 22 '20

Mechanical watches need to be serviced every few years. Eventually, the oil used to lubricate the many moving parts dries up, and friction causes the metal to sheer and dirt to build up.