by raimundo » 1 Feb 2008 11:27
alterantively, you could reverse engineer it from a lock or a key, the dimensions are there, you just have to know how to use them, do not make the cut as wide as the stem, but make it so that it catches the stem at a point between the 3 and 4 pin, that is almost but not completely halfway around the diameter, If you look into the inside of the key, measure the distance from the edge of the stempickup to the opposite inner wall, and make sure that the cut you make in the metal is less than this dimension by a bit. The tool pictured has a certain standoff above the end of the stem, you pay for every bit of standoff you put on it by having the additional problem of keeping it perpendicular to the stem while torque ing, You could design a better one by making it fit flat against the face of the lock and even having a part that bends out 90 degrees to brace against the face of the lock. Equally, you could modify a flat screwdriver to hold straight into the lock and tork it, so that your torque is held perpendicular while using it.
Wake up and smell the Kafka!!!