I have some tight tolerance work coming up and will be using some very small end mills. I measured my run out on the spindle and its .001". For a new machine with not a lot of hours on it this seems like a bit much to me. I measured the inside of the spindle taper with a dial indicator for the first measurement. Then I measured about 1" from the spindle using a carbide rod in a tts holder. Run out remained the same. If I side load the spindle (light push by hand) I get about the same amount of indicated flex. So my question is how much is beyond normal. Is it adjustable in any way?

Maybe I'm being too fussy. Have any of you guys checked your run out and if so what did you find?

Tom