Well the Material Selection isn't really all that important, it actually came down to me rummaging through stock till i found something that was a workable size, it tested Rockwell B 95 (100 ksi Tensile) I did have a piece of 4340 but it wasn't long enough to get 3 out of. But yeah if I did mill down a whole 1.5" and it didn't sit flat on a surface that'd be fine, I just think that would kind of be time intensive.
The objective of these spike is to stand up next to eachother in a circle so that they can be plunged into the ground below asphalt that has a approx 2" hole drilled in it. Then they take a pipe and force it down on the chamfered/tapered ends so that the spread out like an anchor so that when they're pulled on they'll grab the asphalt and stay put, I think they're aiming to hold 15,000 lbs to stop a car or something. So really my tolerances are loose and they just have to fold up n fit within a 2" hole but I'm trying to stay in tolerances n become a better machinist since this is one of my first few money earning jobs.
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-JWB
--We Ain't Building Pianos (TCNJ Baja 2008) |