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September 14, 2016 23:03

How to choose a drill for metal , concrete, wood

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  • 1 Choice drills for metal
  • 2 Choosing a drill on concrete
  • 3 Drills on a tree: how to choose?
How to choose a drill for metal , concrete, wood photo Selection tool to repair the apartments.Choosing the right drill.

drill - a versatile tool, without which it simply can not do during the repairs of all kinds of complexity.Today, there are so many kinds of drills, and therefore it is very important not to make mistakes and make the right choice, so then do not have to be replaced, or simply throw away such a tool in the event of premature failure.Site Repair apartments with their own hands will tell how to make the right choice.

Substantially all drill only differ in their appearance (diameter and length), as well as the material for which they are intended and, as a result, sharpened.Accordingly, it is necessary to initially pick up drill size (need to match the thickness of a tool material to be drilled, or the screws, anchors, etc.).Next, you should choose the drills depending on the work to be carried out.

Selection of drill b
its for metal

Drills for metal from the usual (meaning those that are used for treatment of wood) are characterized by their versatility.Such a tool is indispensable when working with metals and it can be used to create holes in alloyed and unalloyed steels, metal, cast iron and non-ferrous metals.

most common today are twist drills for metal.Typically, such drills are metal cylindrical rod, in which the two helical grooves forming cutting edges formed.These grooves run at an angle of 10-45 ° to the axis of the cutting tool.

need to pay attention also to the material of which the drill bit is made.To date, the best quality for the metal working tools made of high speed steel (eg, R6M5) or the same alloy (9XC).These drills have improved strength and durability, and enable maximum results in the process.

Selection of drill bits for concrete

Concrete - durable and strong material, which is very difficult to treat, especially to drill a hole.Generally, the concrete used for drilling special drill tipped with tungsten carbide and cobalt ( "win").Furthermore, through the use of modern technology in the manufacture of cutting tools, drill bits appeared on the market, made of modified volframokobaltovyh alloys.

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for processing brick or concrete, use a drill in which the tips of the soft or medium soft.In the same case, if you want to process granite or other solid materials (eg, the same tile), then without pobeditovye drills with plates of medium and high hardness (in addition to them, a series of teeth grinding and reverse) simply can not do.

Wood drills: how to choose?

for woodworking modern market offers a wide range of highly specialized cutting tools.In particular, work with wood is simply impossible to imagine without the use of the three main types of drills:

  • twist drills - sharpened metal spiral, which is used to create holes in the wood of small diameter (8-28 mm), but quite a significant depth (300-600 mm).Due to its helical shape such tool is very easy to deduce from the work area after completing the work.Fountain
  • drill usually applied in those cases when it is necessary to create any blind bore in the wood with a diameter of 10 mm or more.It should be noted that this bit can only be used to create openings, as in the absence of cutting edges on the side surface of already existing drilled impossible.
  • cylindrical (ring, crown) drills are widely used to create a large-diameter holes (26 mm).The main advantage of using such drills is possible to obtain accurate holes without burrs and other defects, and high processing efficiency.

General recommendations when selecting drills

Choosing a drill to work, you need to pay attention to their appearance.The tool, when it comes to really high quality, should not have chips, dents, scratches and other defects.The cutting edge must be sharpened quality over the entire length and have a uniform color.

When selecting drills, regardless of the material of which they are intended, it is necessary to pay attention to their color to process - for it is easy to determine the finish hardening treatment, which was carried out:

  1. Grey - steel - processing is carried out.
  2. Black - drill was treated with superheated steam for hardening.
  3. Gold - Drill passed treatment vacation to relieve internal stress of the metal.
  4. Bright gold - on the surface of the tool with a layer of titanium nitride, designed to cement and extend its service life.

not be amiss to mention the fact that when choosing a drill you need to pay attention also to the firm - manufacturer.It is best to give preference to eminent companies that are on the market for several years.Only in this way can avoid fraud and wasting money.