Drilling operation is essentially a kind of cutting, the completion of cutting needs to meet the premise, that is, the hardness of the Tool material must be higher than the hardness of the processed material.
Precautions when using Drill Bits
Bit material and heat treatment hardness, rigidity, and it is also very related to the Angle of grinding, different sizes, different drilling materials, to grind into different angles and tilt Angle. The harder the tool, the worse the toughness, and the thinner the bit, the worse the stiffness. The speed of drilling should not be too fast, especially the larger the hole should be slower. It is best to add appropriate cooling oil or water. In general, when drilling, it is necessary to make sample and punch holes first to prevent the bit from running off at the beginning. In home decoration, the general power of about 400W electric drill or Impact Drill can meet the requirements. So black drill drill iron is better, because we often need to make a hole what, we might as well at home to prepare a household drilling equipment, in case of need.
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