The economy chucks are usually mainland China, the TIR can range quite a bit, the one that came originally with my 1340GT (before they upgraded to Taiwanese chucks) had a TIR of around 0.002-0.003 (but that was a long time ago). You can always take a small cut on the register and use the tap method to get the TIR down and then tighten the chuck. But, TIR you are measuring is typically at one point on the scroll, better chucks will have better linearity across chucking at different sizes. Less expensive chucks typically have 2 sets of solid jaws vs. 2 piece jaws, so this will also introduce more variation on the TIR. You can always upgrade your chuck to the Chandox Set-True Taiwanese 3J scoll with 2 piece jaws that QMT offers as an upgrade. Worth considering if it is your primary chuck.