If you want to cut a round hole in the plywood or other rigid sheet material, but no jigsaw or handsaw pointed, easy to assemble witty prisposoblenie that will replace these tools. Only need two metal cores, one of which is pointed, the other sharpened like a cutting torch. Clamped in the vise at the required distance from each other, the first rod will serve as the axis on which will be pressed to rotate the plywood on top, and the second is from the bottom to cut the necessary hole.
Recommend to read
MODULAR POWER SUPPLY
In Amateur practice when developing or building a device often require multiple power sources at different voltages. For example, structures made in operational amplifiers and working in...
THE EASTERN “MARTIAL ARTS”
A crushing defeat of Japan in 1945 radically changed the geopolitical situation in the far East, however, does not make this part of the globe calm. A series of bloody wars in China,...
