Types and rules for choosing tubular drills

In the process of installation work, various types of drills are often used. Such tools allow you to make recesses in the materials for fasteners. These elements can be made in different designs. Today we will talk about the main features of tubular construction drills and what varieties they can be.

Tubular drills are most often produced with a special diamond coating. Such tools allow holes to be drilled in solid and solid substrates, even in thick concrete.

Tubular parts are most often presented in the form of a cylindrical structure or polyhedron. They can be used for a screwdriver or for a conventional drill. These varieties can be used for drilling a wide variety of materials.

Tubular drills include 2 components:

• diamond ring (cylinder);
• special extension cord.

The first part looks like a small diamond-coated bit on the edge. This part acts as a cutting part.

The extension is in the form of a cylindrical body. The ring is not fixed on. Sometimes small holes are made on this part, designed for timely cooling, as well as for regular removal of chips. Such models can be used as tools for wood, metal, glass and even paper.

Special diamond coating allows not only to significantly improve the level of quality of the work performed, but also to use the drill many times. And at the same time, the cost of such cutting devices is quite low, almost any buyer can purchase them.

Diamond coating ensures durability and reliability of the drill bit... It is a mass of many small diamond grains. They are attached to the metal body of the products using a special adhesive that does not allow them to fly off even during constant use.

However, these models also have some negative qualities.... So, do not forget that they have a rather limited resource of work. These drills are capable of making only a few holes with high quality, after which they should be replaced with new samples.

Diamond-coated tubular drills are widely used not only in household repair use, but also in mechanical engineering, radio electronics.

Tubular drills are of different types. So, depending on the material for which these elements will be used, they can be subdivided into tools according to:

• tree;
• ceramics;
• metal;
• concrete;
• glass;
• paper;
• rubber.

Tubular drills can vary significantly from each other and depending on the shape of the shank. The main ones include the following models.

• Cylindrical drills. This option is considered the most popular. Models of this type are made of high quality steel (high speed, alloy or carbon steel). Cylindrical varieties are often used for drilling various metal parts. They are great for a regular drill, so this option is good for DIYers.Cylinder shanks generally have the same diameter. But there are also stepped models. These tools are firmly enough to hold in the chuck, in the process of work they will not go to other directions.

• Conical drills... This option can also be considered quite common. This type of shank has the shape of a small cone. These models are most often used for special machines. These drills allow you to quickly and easily make an automatic change to another tool if necessary. Conical versions can be produced with small legs, and then the attachment to the machine takes place by jamming. Some models are produced with a special thread, in this case, the fastening takes place using a rod. Samples are also produced that do not have legs or threads, they are used for drilling the lightest materials.

Tubular drills can also differ in the design of the cutting part. There are 2 main types in total.

• Hollow cylinder-shaped working part... These models allow you to create smooth circular indentations in a variety of materials. The diameter of this part and the diameter of the shank may or may not coincide. These samples for drilling require significant physical effort in the process. The diamond coating is most often not applied to the entire working part - it is used to process a small segment, which is directly involved in the drilling process. As a rule, on the surface of such drills there are small holes through which the chips formed during operation are removed.

• Ring-shaped working part... This option is similar to the previous one, but the cutting section is much smaller in height. More often it is completely covered with diamond dusting. The diameter of the ring tip can be different (from 32 to 350 millimeters). Currently, universal samples are being produced that can be used for processing various materials, and products intended for processing only certain specific surfaces (rubber, wood).

They have a special tip in the form of a small metal ball, on the surface of which cutting teeth are placed.

Such models are most often used for processing glass surfaces. In the process of work, such drills will not move to other sides. Many varieties are available with a small diameter tip that makes it easy to make small holes in the glass that will hardly be visible. During manufacturing, the tip is also coated with a special diamond coating.

Before buying the desired model of tubular drill, it is better to pay attention to some rules for the selection of such building parts. So, first, decide what materials the tool will be used for.

• For drilling various glass structures, which have considerable strength and hardness, it is recommended to purchase models with a ball-shaped tip.
• If you are planning to take a sample for processing metal, concrete, rubber or wood, then you should pay attention to the size of the products, including their diameter.
• If you often do all kinds of assembly work with various materials, it is better to immediately buy a set with all types of tubular drills. You can also purchase a universal model of this tool.

Otherwise, defective drills will not only fail to make high-quality and even grooves, but also spoil the material itself.

Before starting work, the drill shank must be firmly fixed in the tool holder.Make sure that it is attached to it as tightly as possible, otherwise, during the drilling process, the product may simply shift to the other side and damage the material.

When drilling, remember that the rotation speed of the drill will directly depend on its diameter, as well as on the type of surface to be treated. In this case, the smaller the diameter value, the higher the speed can be set.

When installing, do not forget to promptly remove the chips formed on the surface of the material. It should not be hammered into the grooves made.

How to choose a drill for the job, see below.