Originally Posted by noid Yes a supported thompson rail with the open blocks. I find a that in canada with the shipping and such the rails themselves are the expensive touch. Precision ground shafting is about 2.50/ foot this means of course a 10' bar costs 25.00 heat treating is about 1.00/pound so I can produce 2 5' rails for about 32.50. Now this is only a ballpark price so far but it blows the 125.00 usd/36inch length figure out of the water. |
I'll be interested to hear how the shafts turn out after hardening. Doubtlessly, they will use induction hardening methods, but I wonder how much warpage will occur, because they have to use a water quench (I believe) in order to harden precision shafting (typically grade C1045).