Few of the tinkerers complete today without an electric drill. Due to the different types of bits manufactured by the industry, this tool is skilled in runes becomes truly universal, turning it into a circular saw, grindstone, grinding machine… However, not all the features of the drill have already been implemented. For example, it took me to do hidden wiring, and for this we need to “chew” in concrete and wood deep grooves. There’s even a drill with pobeditovym tip proved to be ineffective. Then was born the idea to make a special mortising attachment — to turn the drill into a mini drill.
But how to convert a rotational motion of the output shaft of the drill to reciprocating move the gouge or chisel? Upon reflection, I decided to create a shock wave to use balls made from conventional bearing.
The principle of operation of the nozzle is as follows. On the shaft of the electric drill rotates the firing pin, with sockets four-ball Ø 4,5 mm. From the return part bumper also has four similar ball, but he does not rotate the notched cutout of the guide flange. Therefore, at the moment of impact of the balls bump sharply moves forward; back it returns a specially installed spring. The progress of the bump is determined by what are the balls from the sockets; my fit — 3 mm. After planting bulbs, so they don’t fall out, the edges of the nests should resciniti.