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
THE INSTRUMENTAL AT THE GARDEN
Have a gardener to care for plants, a lot of small additional tools, which need to have on hand while working in the garden. Here's a simple box will not only serve as a convenient...
TABLE-CLAMSHELL
After construction work in the suburban area is over, usually remains a lot of unused material: bars, rods, metal profiles, pipes. All this will be useful in further equipment built...
