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
WITH THE RUBBER MOTOR AND WITHOUT
Schematic model of the airframe and the aircraft, as you know, started flying much earlier than their full-size prototypes. Paving the real aircraft's path in the sky, they are now...
BIKE IS CHANGING THE SHOES
For a man, far from technical creativity, the expression "reinvent the wheel" has a negative connotation: a waste of time, repetition of already traversed. However, the designer-Amateur...
