Do You Know The Three Common Types Of Center Drills

In earlier years, center drills were mostly used on lathes to drill center holes for shaft components. With the increasing prevalence of automation, it should be more widely used in multifunctional CNC equipment. Its obvious function is to point the center hole to ensure the positional accuracy of the part hole machining.
The main function of the center drill is to guide the Fried Dough Twists drill to process holes, reduce the errors in processing, and facilitate the use of other drilling equipment.
There are several common types of center drills, and in this article, we will talk about the three most commonly used types. A-type center drill, B-type center drill, and composite center drill.
As we all know, different types of center drills have different drilling requirements. The central hole is mainly the positioning base surface for the installation of shaft workpieces on the top. The 60 ° taper hole of the central hole matches the 60 ° taper surface on the top. In the small circular hole at the inner end, in order to ensure a more fitting fit between the hole and the top taper surface, we can store a small amount of lubricating oil to make it smoother when working in the central drill.
Type A is a center drill without a protective cone, while Type B is a center drill with a protective cone. The center hole of Type A center drill only has a 60 ° taper hole, while the outer end of the center hole of Type B center drill has a 120 ° taper surface, also known as a protective taper surface, to protect the outer edge of the 60 ° taper hole from being damaged. So the two are used in different lathes or machine tools. Of course, before use, the end face of the shaft should be flattened to prevent the center drill from breaking, which is necessary for both.
The B-type center drill is different from the A-type center drill. The B-type center drill mainly has a 120 ° conical surface at the outer end, also known as a protective conical surface. It can be used to protect the outer edge of a 60 ° conical hole from being damaged by impact.
B-type center drill is mainly used for machining on lathes or specialized machine tools. Before machining the center hole, the end face of the shaft should be flattened to prevent the B-type center drill from breaking, while the peak angle of a standard center drill is generally 118 degrees. When users choose B-type center drills, they often need to design according to their needs and choose the appropriate model of center drill. When using it for processing, if there are any abnormal problems, the processing work needs to be stopped until the cause is identified before processing.
Before machining the center hole, we can first flatten the end face of the shaft to prevent the center drill from breaking. Generally, the peak angle of the standard center drill is 118 degrees. In fact, the function of a center drill is not only for positioning, but some customers also use it as a chamfer drill. Many products require chamfers on the holes, and some are not strict enough. They can be easily hooked with a hook knife by grinding with a rod. However, when it comes to strict requirements, a center drill can be used for secondary processing.
Essentially, composite center drill is a very common machining tool, and with the rapid development of industries such as aerospace, automotive, and communication, industrial products have increasingly high requirements for machining efficiency, precision, and smoothness of mechanical parts.
In order to continuously meet the growing demand and occupy a place in the fierce market competition, the composite center drill can not only be used independently, but also applied in different mechanical equipment. Its special function lies in its outstanding performance in deep hole machining in space drilling. The basic style of the composite center drill can be customized according to your needs, and its basic style and performance are similar to those of a machining center, with important machining functions.