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
ON A FLOAT – ON FOOT, OARING AND SAILING
You will probably agree that it is difficult to imagine more accessible and healthy stadiums than small and large rivers, lakes and reservoirs scattered throughout our country. But today,...
“ACUPUNCTURE” FOR METAL
In the Soviet Union it issued certificate number 365089. Obtained patents in Italy, Sweden and France. License was purchased by the famous firms in the United States, and Japan; they are...
