I would add machine weight to your table of accuracies.
The accuracies are just posistioning. Once you take into account cutter deflection and thermal growth it's hard to obtain those accuracies. But yes a machine with a higher posistional accuracy will have an much easier time machining a larger tolerance.
If your tolerances are only +/- .005" probably just about any mill will do. If you are going to be working to tenths every day then you need a very precise machine along with a good cmm to check the parts.
JP |