What method should we pay attention to when drilling small holes and long holes in plain drills?
When the bit is drilling the deep hole, the peak angle of the drill must be flattened so that it can drain the cuttings. In addition, when drilling, it is necessary to raise the drill bit and clean the drill bits in time, so as to prevent the bit from being squeezed by the chip, so that the drill bit is broken. Don't add too much coolant when drilling deep holes.
When drilling a deep hole or a long hole, the workpiece must be fixed. Drill the hole with the center first, then drill with the bit so that the drill will not drill the hole when it is drilled.
Coolant added a lot, although the cooling effect is good, but it will make drilling cuttings are not easy to row out. Just use a brush with a coolant, and when the drill is lifting the cuttings, brush some of the coolant on the drill. Each time the drill is drilled down, do not enter too much at once. Especially in the hole drilling more and more deep, but also frequently drill bits, cleaning up drilling chip.
