What's the difference between full mill and rolling twist drill?
The mill is the whole cutting molding drill, rolling is half full grinding material pressure after a long drill, the above material is less than half, so the hardness will be affected, anyway, the rolling twist drill is not good! Without the use of, respectively, rolling and full grinding, just look at the groove can be, there are obvious texture grinding marks are all grinding, and, conversely, messy, irregular rolling.
The full grinding twist drill is made of Kunlun twist drill, which is especially high cost, especially durable, and can be used by 1 of them for more than 300 eyes! It is awesome, and playing is stainless steel.
A word is not clear, the different processing technology, the high production cost of drilling grinding, rolling and drilling cost is relatively low, also has the gap, drill grinding durability is more than fifty percent higher than in the rolling, and workpiece cutting performance, drill to drill a lot, I was the production
