Hace 30 años (año más, año menos) yo necesitaba urgentemente una mecha radial, pero cuando la fui a comprar me acobardé por el precio. Como la necesidad es la madre del ingenio, pensé y pensé, hasta que me decidí a intentar hacer una mecha radial improvisada.
30 years ago (year more, year less) I desperately needed a radial bit, but when I went to buy it, I chickened out for the price. As necessity is the mother of invention, thought and thought until I decided to try to make a makeshift radial bit.
Step 1: Consiguiendo materiales (getting materials)
At the same hardware store where they sold the tool that I found very expensive, I bought a steel screw with high brass nut, which are used to tighten the exhaust manifolds of car engines. The screw was standard, not like the photo that shows why I not find another.
Step 2: Agujereando (drilling)
I put the nut on the screw, about two cm from the end. I marked the place and made a 5 mm hole trying to stay as focused as possible. This was not critical, luckily, because my pulse and my eyes were never outstanding.