Axial play

Hi everyone. Just wondering, what is a nornal axial play that can be expected when a milling tool is unclamped (M252 on MTPro) or clamped (M219; M253) ? Mine is 0.03 mm and it's seems too much as I can notice the consequences on workpieces. But I didn't measure when machine was new, so I can't say what is the "nominal" play. If someone can be so kind to check on his machine, I'll be greatful

The tool should be held tightly in the turret, no decernable play. Sounds like there is some runnout in the spindle nose. Can you check without a tool? Please advise.

Thanks for reply, 123. The tool is held tightly. Yes, the test is the same without a tool: ATC MAINTE menu, when going from MILLAXIS CLAMP to MILLAXIS UNCLAMP, the spindle nose shift 0.03 mm toward outside. Runout (radial play) is zero, so drilling and 2D contouring is still fine. I guess the bearing preload is going south and a spindle refurbishing will happen someday, however, looking at the drawings I wash thinking some kind of play is necessary if the clamping bang should not be absorbed by the bearings, just don't know how much on a new machine

I'm not sure you have any problem here at all.......let me do some checking....I'll get back tp you.

0.03mm is not too bad. you can adjust it much closer by adjusting mill clamp/unclamp coupling (may be Mazak123 can help with a procedure from Japanese site :). the best i had it adjusted is down to 0.015mm (0.0006"), but if you want it perfect you will need to spend more time on it.

your question is not very clear. as far as i understood you have a discrepancy between when the mill spindle is oriented and when the mill spindle is oriented and clamped. if you orient the mill spindle, put an indicator on the end of a tool and then clamp the mill spindle you are seeing 0.03mm jump. is this correct? if so an adjustment as described above could be performed.

There is a procedure for ajusting coupling to agree with orient position. I'll check.