There are two types of center bits, each of which has nine specifications. Center drilling is used to add center empty equipment to the section of the object, which can be accurately prefabricated positioning, and guide the twist drill to punch holes in the positioning range, and the error is very small. There are two types of center drill, type A is a separate drill body without an awl bit, and Type B is a center drill with a guard cone. The difference between the two lies in the function, when the diameter of the center hole that needs to be processed is only less than 10 mm, the A-type center drill is generally used, because the diameter is too small, the A-type center drill without an awl is maneuverable and can be fine-tuned.
For high accuracy requirements and relatively lengthy and complex operations, type B is generally selected, because it can avoid destroying the centering cone inside. Whether it is type A or type B, there are 9 types of drill bits, the smallest is 0.7, the largest is 6.3, each specification of drill bits, the work to be carried out is different. It is precisely because of the wide variety of center drilling, so he is applicable to many fields, especially the drilling of small items, the center drill is more portable, and its own power can directly discharge the debris brought by the drilling, clean and efficient.
Although the center drill has many benefits, but in its use process there are also many precautions, the first is the cost problem, the hardness of the center drill is larger, but it will wear, so the hardness of the processed object between 170-200HB, the consumption of the center drill is the most appropriate, and the drill knife before use, it is best to wash the anti-rust grease coated before maintenance. So as not to affect the operation, or even be thrown out of the debris cut.
