Comfortable and high-performance tool — the jigsaw is much easier and straight and curved sawing of wooden workpieces. Simple Supplement thereto, proposed by the Hungarian magazine “Earmaster” will allow to simplify such an operation as getting round parts, and any radius. It is reduced to a minimum preparatory actions: on the graduated scale set the required distance from the center of the future circle with the slide bar; its awl stick in the center, and with the opposite end in the slot of the guide handle install jig now his blade goes in a circle, as attached.
To manufacture such a device is not difficult, especially because its constituent parts do not require special materials or complex processing all the main components are made of wood.
The only complex element may seem like a slider, but it is on closer examination it appears simple-a prefabricated Assembly consisting of two wooden pieces: top, body, running from block section 45×30 mm, the bottom sole is made of plywood, which thickness must be equal to the thickness of the sole guide of the handle with the lining. In the case of the slide drilled the holes for the clamping screw with nut and handle with an awl (wood screw), and the bottom out with a chisel two slots: lateral — under the metal spacer, the thickness of the line and cross under the very bar so it could slide freely when setting the desired radius. Slot nut clamping screw has a recess under the “coin” to protect the line from injury by the propeller.