AND DRILL AND COUNTERSINK BIT

DRILL BIT, AND COUNTERSINK BITHoles 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 simultaneous drilling with chamfer
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

  • CASTING OF PLASTICSCASTING OF PLASTICS
    The details of the models are usually made of plastic or metal by machining. However, when they have much better detail molding plastic in a plaster mold. To prepare plastic from acrylic...
  • AUTOMATIC ON-OFFAUTOMATIC ON-OFF
    This device is designed to automatically turn on exterior lighting after dark, and, accordingly, the automatic switch-off at dawn, which is always important, especially in terms of...