Sometimes the drills, especially in the already served, without distinction, the marking indicating the diameter. It would seem that to define it is only possible with a micrometer. But here’s a simple and fairly accurate method of measurement with… grip. Drill clamped in their jaws, and remaining between them a gap corresponding to the diameter of the already available ordinary ruler with millimeter divisions.
Recommend to read
Mounted and suspended water jets
The advantages of an outboard waterjet were already discussed in the article «Water instead of a propeller». Now we will tell you about its design. The waterjet installation we developed...
IF THE FILM IN ROLL
Many photographers prefer to buy film in roll, get the same and its various laboratories. And if one tape charge is not a problem (although for beginners and it's not easy), when you...
