Two simple techniques to prevent the wood from bursting at the exit of the drill bit.
The wick that we see here is that of an extensible model: it allows to obtain several diameters of drilling, adjustable at will.
To drill a hardwood (oak, chestnut, etc.), set the drill on a slow speed (1? 000 rpm); go up to 2,000 rounds for a soft wood like
Place a "martyr" (buffer wedge) under the piece to be pierced.
Hold the drill firmly, perpendicular and squeeze.
Drill continuously until the room is completely crossed.
To drill with a hole saw, prime the hole on one side until the centering drill opens on the other side.
Turn the workpiece over, place the drill in the centering hole and cut.
The larger the drilling diameter, the lower the speed of rotation of the drill.