When performing various maintenance and
construction work is often necessary to make a hole with large diameter in a
metal or plastic.
When drilling large holes, a number of
difficulties. If you buy enough powerful drill is not so difficult, you
have available all the necessary drill diameters are already becoming a
problem. Drills with diameter 10 - 40 mm are expensive, bulky, and their
shafts cannot always be clamped drill chuck available. BTW, you can buy the
hex shank drill chuck at Banggood. Besides, you can easily get other electronic
accessories (e.g. spacer screw) there with high quality and reasonable prices.
In addition, when drilling a conventional
thin metal drill hole is obtained irregular triangular shape. To overcome
these difficulties helps step drill. It is a cone with steps, each of
which is responsible for its diameter. The most frequently encountered in
the drill for sale are 9 - 12 sets of steps and allow to making holes from 4 to
36mm in diameter, allowed to drill holes in solid metal up to 2 mm, in
color and up to 5mm to 10mm in plastic. In order to make the opening step
drill, it is necessary to tighten the chuck and drill leaning against the edge
of the planned drilling site. Selected location is not necessary, as the
drill bit does not slip, and immediately cutting into the metal. Next, you need
to start drilling, gradually increasing with each step up to the required diameter
of the hole. Upon completion, the same drill can be chamfered.
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