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Types of CNC Drill Bits

There are many types of CNC drills, which mainly depends on what workpieces are used to process, and whether the machine tool is good enough, and whether high-efficiency drills can be used.


1. The types of CNC drills are generally divided into high-speed steel (HSS) and cemented carbide according to our commonly used materials


 If the machine tool spindle has good precision and high power, alloy drills can be used to improve processing efficiency. If the cost is considered, high-speed steel is more cost-effective, but of course the efficiency is relatively low. Compared with the same period of last year, alloy drills are 1.5-3 times more efficient than high-speed steel drills.


The advantages of alloy drill: high hardness, wear resistance, high temperature resistance. Disadvantages: Hard and brittle, easy to break when used improperly.


2. The types of CNC drills are generally divided into ordinary drills, shallow hole drills, deep hole drills, center drills, etc. according to their use


Needless to say, ordinary drills are used to process ordinary holes. Generally speaking, a high-speed steel drill is used to process 12 holes, which may be about 10-20 wires larger, and alloy drills are generally larger, but generally small. , Of course, when the precision of the machine tool spindle is good, if the longitudinal runout of the machine tool is not good, any drill bit will have a large hole.


Shallow hole drill: Indexable shallow hole drills are generally used in machining centers, that is, drills with alloy inserts. The use of such drills generally requires the machine tool spindle to have an internal cooling device, otherwise the processing efficiency will be reduced.


Deep hole drill: As the name implies, it is a drill used to process deep holes. The diameter and length are relatively large. Generally, there are 2 guiding edges on the side edge.


Center drill: used for processing, to prevent the position change during drilling, and to make positioning holes.


Centering drill: better positioning ability than ordinary drills, generally used for centering holes or processing thin plates. The difference from ordinary drill bits is that the grinding method of the drill top is different.


Reaming drill: a drill used for reaming after drilling with a drill, without the top angle of the drill. Generally, the reaming is between 0.5-2MM, which is used with the reamer.


There are many types of CNC drills, such as non-standard drills, each of which has its own purpose, mainly depending on what kind of drill is needed for the workpiece to be processed.

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