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
INSTEAD OF BRUSH — NAIL FILE
Fall on the overgrown around the pond Bank on clothes to nacelles seeds series. Brush cleans the clothes from seed very bad. Helps file with an average (not small) notch. Sliding...
BOAT? MOTORCYCLE? CAR!
Doctor of technical Sciences Professor A. G. Ignatov enthusiasts of technical creativity known as the author of a number of original designs of micro cars, party contests and...
