How are the center drills arranged and what are they?

Centering drills belong to the seriesprofessional tools, since they are used in most cases in the industrial sphere. The main difference between the data device and the conventional is in the accuracy of the hole being drilled. How the centering drills are arranged and where they are applied, you will find out right now.

Features of constructions

Outwardly this tool is aA small drill of short dimensions with a very thick base. In this case, its diameter can be 2-3 times the width of the working tip of the mechanism. Due to this design, the centering drill (GOST to the confirmation) has a very high rigidity, so when drilling a hole it is almost impossible to bend it or otherwise deform it.

How does this tool work?

First, a small tip drills a holesmall diameter. It, as a rule, is formed after several rotations of the instrument (no more than 2-3 seconds). After that, the smallest hole is widened by the cutting edge of the thick conical part of the drill. It should be noted that when this mechanism is working, the perpendicularity of the groove relative to the material being processed and its surface is guaranteed.

Application

Drill Centering is used for drillingboth metal and wood surfaces. However, "according to the passport", that is, for its intended purpose, this tool should only be used for the processing of steel materials. However, this did not prevent our builders from using it as a countersink for wood, for example, when it is necessary to deepen the hole for the incoming screw of the samoran. Due to their heat-resistant and high-strength construction, they absolutely do not fail after processing similar items and materials.

With regard to their direct designation, datatools are widely used for drilling holes on milling, drilling and turning machines. In addition, centering drills can also be used in the household. Also like to use such devices and radio amateurs. Such drills are more necessary than ever to make holes in printed circuit boards. And since the devices used have high rigidity (this is determined not only by their composition, but also by the special geometry, which we discussed a little earlier), it is very easy and convenient to work with them.

Material

The structure of these devices most often includestool steel series P6M5. In addition, centering drills can be made of high-speed metal HSS. But especially in the production of tools made of steel series P9, which has a large content of tungsten. Due to this, the product becomes even more durable and reliable.

Price

The cost of centering drills depends ontheir dimension. So, for example, the smallest 1-millimeter devices cost about 15 rubles per unit. The largest drills with a diameter of 6.3 millimeters are worth hundreds of rubles.