This is a very difficult question to answer, because the answer is always part dependent. That takes into consideration material, part length to diameter ratio, tooling, etc. Most of our customers don’t have any issue holding +/- .001” almost anywhere on the part. This kind of tolerance should be under control using accepted tooling practices. Many of our customers are holding +/- .0005”, however they may be attending to the machine, changing offsets, etc. more often. The real issue here is usually tool wear. Also it depends on where the tight tolerance is located on the part. Closer than +/- .0005” will require close monitoring and 100% inspection, unless processes are established where the tooling performs under control. The LICO machines are built with the same parameters as most CNC lathes. The resolution is .0001” The cross slides use dovetail & gib designed slides, which give them rigidity and repeatability. The turret uses linear roller bearings and rails that are set extra wide. This provides a very stable Z-axis motion. Those are just some facts that you may want to use. Anything that you are not comfortable answering, refer to Phill, Frank, or Greg. Because the answer is often part dependent, getting a copy of a print is always advisable.