Leuco

The blade is what decides whether the panel comes off finished or goes off to be sanded. On coated wood-based panels, the G6 tooth cuts both faces without lifting the coating — it is the most common tooth form on panel saws and the one that handles most of a workshop's work. Anyone working next to the machine will appreciate the nn-System variant: gullets so small that they run 6 dB quieter at idle, about 70 of them, in diameters from 70 to 350 mm.

On a veneered panel, an ordinary cutter always leaves one face torn. The compression cutter has two helices running in opposite directions that meet in the middle of the thickness and close the panel on both faces at once. It is the trimming tool of the CNC machining centre, and the one that saves the sanding pass that used to follow.

On an edgebander, what decides the glue line is not the glue — it is the cut that comes before it. The diamond cutter trues the surface in the instant before the glue is applied, and it is that surface that decides whether the edge disappears or shows a white line all the way round. A corner trued straight, with no tear-out and no waviness, takes the glue evenly and lets the tape sit down from one end to the other. Diamond keeps the same quality for years, where carbide meant stopping the line to change the edge — and it is that consistency that makes the last door of the batch come out like the first.