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
GIDROSTROITEL A6M2-N “RUTH”
In the period between the First and Second world wars, aviation was developing rapidly. After analyzing the experience of the last war, countries with long Maritime borders, much...
SCOOTER-BABY
I have designed a small moped in contrast to the series sits in the passenger Elevator. This is probably one of its main advantages because the two-wheeled kid's (educational, by the...
