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
NOT A BINDER, AND A CASSETTE
For convenient storage of magazines, clippings and other printed matter manufacture of a special cassette. Run them from any sheet material. For quick search edition paint the backs in...
THREE WHEELS TO TWO
You will hardly find at least one kid who will refuse to ride on a motorcycle. Here guys we have on ascension syut constructed "Cheburashka". Guys micromatics this very much: it is...
