A 31mm long prototype part with 6mm diameter in one end and 3mm at the other. From an M12 stainless steel threaded rod (the only stainless at hand...)
Lathe work
Tag: steel
Steel Fin Moulds
Jari machined these steel fin moulds for the PIKANTO over the weekend. The fin will be moulded with a clear glecoat, one 200g carbon layer as a surface layer, and one 250g/m2 UHM UD carbon layer. We are going to use either cnc-machined balsa cores, or a 2-component epoxy foam core. The bulb attaches with an M3 threaded rod which will be moulded into the lower end of the fin. At the boat end we'll insert a metal piece with M4 threads so the fin can be attached to the boat with an M4 hex screw.
Milling Steel
And here some pocketing in aluminium:
Bulb Milling Videos
Jari shot some videos during the milling of the beaver-tail bulb. They now appear on YouTube.
For a mostly home-built cnc minimill of this size, this is pretty 'hard core' stuff...
Steel bulb nr3
Jari made this steel bulb over the weekend. It has a slightly triangular cross section in the beginning which flattens out to a 'beaver-tail' at the end.