DIVISION (WHEEL-TRAIN HEIGHT LAYOUT)

In watchmaking, Division (wheel-train height layout) refers to the vertical distribution — in height — of the components relative to one another within the watch. When properly set, they ensure that each element has the necessary space to operate freely, without unwanted contact or interference. The division of the hands, for example, concerns their proper distribution between the surface of the Dial and the underside of the Crystal (watch glass): each Hand must turn without rubbing against the one before it, nor against the dial or the crystal. The division of the Escapement concerns the relative heights of the Pallets (lever), of the Escape wheel and the plate, on which the proper functioning of the organ depends. Checking and adjusting the Division (wheel-train height layout) is a key step in assembly: an incorrect Division (wheel-train height layout) causes friction, tight spots, or even stoppages. It involves the precise positioning, in all three dimensions, of the entire wheel train.