I received my B.Sc. and M.Sc. degrees from School of Electrical Engineering & Automation.
My interests are in electrical and mechanical engineering, power electronics and control technologies.
I've created the blog to share my ideas and find new friends with similar interests.
You probably know that there are large-diameter openings circular saws, but the edge of the cut leaves them much to be desired. Therefore, if you are faced with such a problem, then your choice is a Forstner bit:
Forrestner Wood Drill Bit - For Whom Does It Need?
The advantages of the bit:
Conveniently "drill" into a tree
Long service life
Wide size range (up to 60 mm in diameter)
It is possible to "extend" the drill using special extensions
Not particularly expensive
It is designed to work with a drill. The tip is expanded, and the drill is more like a cutter. With it, you can drill holes with smooth and smooth edges. Most often this is necessary in those cases where the hole will "in mind", is not closed at all. Very often these drills are used when it is necessary to drill openings (deaf holes) for door hinges (which go in all modern furniture).
The main advantage is that when working out "deaf" holes, because the tip of the drill has almost no centering edge (only a couple of millimeters), the bottom of the hole is flat. For example, one of my friends has long wanted to make a glass stand (with special hollows for them). I do not know why he needed it, he said that the glass did not fall and did not roll. Something like a skeleton. And with the help of the Forstner drill, he made a beautiful, level hollow in a wood (https://bestdrillbit.com/wood-drill-bits/best-forstner-bits/).
The dimensional series starts at 10 mm. Of course, such small drill rarely use, most often use large diameters. For example, to drill "deaf" holes in a tree / dsp for inserting loops, you need to use a diameter of 35 mm. Available on sale and quite large (50, 55, 60 mm), although quite rarely, it is most likely due to the fact that such holes people prefer to drill with circular saws.
The length of the drill is small, 10 centimeters, so sometimes it is necessary to extend it. Especially for this, there are extensions, usually 300 mm. So if you need to drill a thick deep hole (for example, to pipe 1 "through a wooden wall), then before you run away to buy a screw long drill (which, if large diameter, is very expensive), consider buying a drill and an extension cord, so it will be cheaper, and the work will be done one and the same.