by Malcolm » Wed Jun 22, 2011 2:02 pm
Do you have access to/know how to use a lathe? A suitably sized bar of 4340 steel should only be around $80 IIRC, if you can machine to size yourself then it's just the cost of splining and heat treating. I've never had to pay for heat treating so don't know how much that's worth (I'd guess a pair of shafts would be $50-100 to harden and temper), and I used to pay $40-50 per spline from Gear Cutters before they decided to be dicks, I think their normal prices are around $80 per spline.