Signalwoman posted:Lou N posted:A suggestion. When drilling into material that thin there are drill bits referred to as sheet metal bits or brad point bits. I have a set of English and metric bits just for that purpose.The woodworkers stores carry them. Look for stores under the names Woodcraft or Rockler.
Lou N
good advice, i use to have some, but i kept blunting the ends, for these i drilled a small pilot then ran a step bit through it to enlarge the holes and remove the burrs. the slots were done by drilling 2 holes and opening the space between with a dremel.
it’s really satisfying to see in motion, but of course, it would be, considering the time put in.
i still need to come up with some rods to run to the cylinders, but it’s becoming quite a looker.
Very well done. Very well drilled!
When I was an R&D Engineer I would head out to our tool room and ask one of the machinists to make me a particular size sheet metal bit. They could shape the brad point perfectly on a diamond wheel and as much as I watched I was never able to grasp the technique.
Lou N
