I've just received some Chinese 1204 ballscrews that I ordered a couple of weeks back for the CNC conversion project on my Chester 16V mill. I bought them with no machining because I thought I could just machine the ends myself to fit the mill. I knew the screws would be hardened but I didn't appreciate just how hard ! My regular HSS lathe tools just bounce. Is it possible to machine these ballscrews with carbide inserts or should I find a machine shop to grind them for me (though that would probably cost more than the screws themselves).
Any suggestions would be appreciated