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
TWO FIGHTING WING
Developed in the circle of aircraft modeling station of young technicians of the city of Berezniki of the Perm region and the following proposed model of "air combat" is designed for...
AMPHIBIAN MUSHROOM PICKER AND FISHERMAN
I want to introduce readers "To the" constructed me an amphibian. Constructed I, in practice, to solve a number encountered in the design of problems and contradictions. There were quite...
