Hi all, I have a Sieg SX2.3 Mill and just learning how to. I put the supplied 1-16mm-JT6 Drill chuck in and was surprised at the run out with a 4" test bar (home made in a lathe). What would be an acceptable error ?. The mill is new and I contacted the supplier for some help. They came back with this comment. "The general runout of the drill chuck alone is 0.08mm. However, considering the runout of the spindle which should be under 0.015 and the drill chuck arbor, the actual runout can be more than that. A test bar should be certified by the manufacturer as the runout of the test bar should be under 0.005 and some test bar runout is around 0.0015mm. If you use lathe machined bar stock, the runout will be more than the standard of a test bar. I can tell you it's a lot more than what they quote. Anyone else had this issue ?.