Holes in wood, plastic or duralumin parts are usually done in two steps: first, through drilling, and then chamfering with the core drill or drill bits of large diameter. I suggest a simple device that allows you to combine these operations.
A device for simultaneously drilling with chamfer:
1 — mandrel, steel 40H, 2 — cutter, 3— check, 4 — fixing screw M4
A small chisel made from a piece of drill or tap is fixed on the working tool by means of a spindle with a diamond-shaped hole. After the drill bit deepens the distance specified by the position of the cutter, the edge is removed chamfer.
And, ALIMOV, Moscow
Recommend to read
“ETERNAL” BRUSH
Commercially available brushes have durable plastic pile, and cover with the mounting node of thin plastic is weak. To extend sluzby brush, you need the screws to install the metal...
WITHOUT DAMAGING THE WALLS
As a rule, bathroom accessories: soap, washcloths, shampoo, etc., on the bathroom wall strengthen special shelf. Made of wooden bars of circular cross section such a simple design, which...
