Features step drill for metal , types and purpose

Step drills is also called the "cone" of the working part (not to be confused with conical) in shape.For the domestic market, where there are many different types of similar products, this product is a kind of novelty.Inexperienced people have a vague idea of ​​why do we need this tool and will not acquire it a waste of money if the choice of traditional, habitual patterns and so great for us.

Advantages

1. great resource that provides high strength cutting edges step drill.
2. exact delay required hole diameter.
3. resistance to overheating.
4. chips removed immediately.
5. versatility.Cone drill can simultaneously drill holes and chamfer.Time savings are obvious.
6. Usability.You can drill different diameters one tool.In the case of conventional drills they have to choose, change, and it is - a waste of time.
7. Ability to work with various sheet materials - plastic, metal, plywood and some other.

in various forums is quite a lot of debate about whether to purchase step drills.Some doubt the possibility of their self-sharpening, someone does not like the price, and some just can not understand the specifics (and, hence, convenience) of use.If we sum up the views of those who are called "skillful hands", has already tested the tool in action, we can conclude that the step drill has a number of advantages over conventional counterparts.

application features

• Possibility of any "ragged" opening, regardless of its configuration (triangular, square, and so on) to turn into a neat circular required diameter.
• indispensable thing when working with thin sheet metal, plastic, glass and several other materials.Step drill is perfect for use by professionals, installers, and at home it is desirable to have - as the saying goes, a tool "for all occasions".
• During drilling there is no such consequences as the edges of the material deformation (bending the edges), burrs, peeling paint.
• difficulties Sharpening is not - at least in the machine, even manually.
• State - is strictly perpendicular to the treated surface of the sample.
• The larger hole must be drilled out, the lower speed should be e / tool.In practice it is possible to use not only e / drill, but the screwdriver.Still, better to do it on the machine.Then the "verticality" of the drill will be provided for 100%.

Members noted a lack of 2:

• Small depth "passage", which is limited by the height of a "step".
• high cost of the tool.

Species cone drills

They differ only in the arrangement of the grooves, which are spiral or straight.Masters, who worked with that, and with another tool, a significant difference in the application can not see.It is only in the specifics of sharpening.Restore performance drills with straight grooves is much easier.

cost

It depends on the size and material of manufacture.impressive price range.For example, a sample of 4 - 20 mm with a titanium coating is sold at an average price of 445 rubles.The same type of drill bit with the parameters 4 - 30 should have about 1 200 rubles.But it is the product of the domestic producers.

Foreign counterparts have a higher price.For example, «Bosch» 4 - 20 will cost not less than 2 850 rubles, and the same tool with the size 6 - 39 should have about 5 000 rubles.

Practical recommendations

high cost often deters potential buyers.Still, you do not need to spare money for the purchase of step drills.However, provided that the instrument is not fake, but from the manufacturer with a proven track record.It is better to buy one for a long time, than to constantly run to the shops and buy another "cheapness."

Practice shows that if we consider all the inconveniences associated with the downtime spent time and money to purchase another "budget" option, then in general it turns out that the higher cost of high-quality tool pays for itself many times over.Especially that one drill step replaces a set of traditional cylindrical.

Do not forget that the price of imported goods, as a rule, laid the "cost" of the brand, his "untwisted".That is, we are in fact part of the money does not pay for the tool itself, but for its branding.Should I do this to you, dear reader.