How to choose a drill for metal, concrete, wood

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Contents

  • 1 Selecting a drill bit for metal
  • 2 Choosing a drill bit for concrete
  • 3 Drill bits for wood: how to choose?
How to choose a drill for metal, concrete, wood photo Choosing a tool for apartment repairs. Choose the correct drill bit.

Drill - a universal tool, without which you simply can not do when carrying out repairs of all kinds of complexity. To date, there are many types of drills, and therefore it is very important not to make a mistake and make the right choice, so that later you do not have to replace or even throw out such a tool in case of its premature failure. Website repair apartments with their own hands will tell you how to make the right choice.

Essentially all drills differ only in their appearance( diameter and length), as well as with the material for which they are designed and, as a result, sharpened. Accordingly, it is necessary to initially choose the size of the drill( it is necessary that such a tool corresponds to the thickness of the material to be bored, or self-tapping screws, anchors, etc.).Next, you should choose a drill, depending on the work to be done.

Selecting a drill bit for metal

Drills for metal from conventional( meaning those that are used for woodworking) are distinguished by their versatility. Such a tool is indispensable when working with metals and with its help it is possible to create holes in alloyed and non-alloyed steels, cermets, cast iron and non-ferrous metals.

The most common today are spiral drills for metal. As a rule, such metal drills are a cylindrical rod in which two screw grooves are formed, forming cutting edges. These grooves are made at an angle of 10-45 ° to the axis of the cutting tool.

It is also necessary to pay attention to the material from which the drill is made. To date, the most high-quality tool for metal processing is made from high-speed steel( for example, P6M5) or alloyed( 9ХС).These drills have increased durability and strength, and also provide the opportunity to achieve maximum results during operation.

Choosing a drill bit for concrete

Concrete is a strong and powerful material, which is very difficult to process, especially to drill a hole. As a rule, special drills are used for drilling concrete with tungsten and cobalt hard alloy soldering( "win").In addition, thanks to the use of modern technologies in the manufacture of cutting tools, drills made from modified tungsten-cobalt alloys have appeared on the market.

Instruments
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For the treatment of bricks or concrete, drills are used, in which the tips are soft or of medium softness. In the same case, if it is necessary to treat granite or other solid materials( for example, the same tile), then without using the winning drills with medium and high hardness plates( in addition, a series of teeth and back sharpening are performed on them) is simply indispensable. Drill bits for wood: how to choose?

For the treatment of wood, the modern market offers the widest choice of highly specialized cutting tools. In particular, it is simply impossible to imagine working with a tree without the use of three basic types of drills:

  • Spiral drills are sharply sharpened metal spirals, which are used to create holes in wood with a small diameter( 8-28 mm), but rather significant depth( 300-600mm).Due to its spiral shape, such a tool is very easily removed from the working area after completion of work.
  • Felt drills are generally used in cases where it is necessary to create any blind hole in wood with a diameter of 10 mm or more. It should be noted that such a drill can only be used to create holes, because in view of the absence of cutting edges on the lateral surface, it is simply impossible to ream the already existing one.
  • Cylindrical( ring, core) drills are widely used to create large diameter holes( from 26 mm).The main advantage of using such drills is the possibility of obtaining a neat hole without scoring and other defects, as well as high processing efficiency.

General recommendations when choosing drill bits

When choosing drills for work, it is necessary to pay attention to their appearance. The tool, if it is a question of really high-quality, should not have chips, dents, scratches and other defects. Cutting edges should be high-quality sharpened along the entire length and have a uniform color.

When choosing drills, regardless of the material for which they are designed, you need to pay attention to their color - it is easy to determine the final hardening treatment that was carried out:

  1. Gray-steel - processing was not carried out.
  2. Black - the drill was treated with superheated steam for hardening.
  3. Golden - the drill has passed the tempering treatment to relieve the internal stresses of the metal.
  4. Bright gold - on the surface of the instrument a layer of titanium nitride is applied, designed to strengthen it and prolong the service life.

It is not superfluous to note the fact that when choosing a drill, you need to pay attention to the company - the manufacturer. It is best to give preference to eminent companies that are on the market for more than one year. Only in this case it is possible to avoid fakes and extra spending of money.

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