Offer homebrew. engaged in the manufacture or have manufactured furniture with doors mounted on piano hinges to replace them on domestic furniture, because the presence of piano hinges, even on well made furniture clearly indicates its self-made origin is unsightly.
However, the house master, who wished to use invisible from outside of door furniture hinge, faces the challenge of manufacturing on the inner side of the door for every fly round recesses with a diameter of 36 mm with flat bottom and a depth of 11 mm when the thickness of the chipboard 15 mm. in which interference should enter the door part of the furniture hinge.
At the furniture factory the groove is drilled on a special machine tool resembling a finger milling cutter. I drilled a normal drill with a simple drill of their own making, which offer homebrew.
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