Hello guys,

I get strange spindle noises. When I warm up the spindle, nothing happens, everything is ok with it. When I run the program, in first couple of minutes, I get some strange noises that seems to comes out of the spindle nose area. After few minutes, it disappears and the spindle is running as usual. It is not happening every time I run the program. Also it can appear in the middle of the program, lasts few minutes and disappear. The sound itself is not a high pitch, sounds like when you have coins and tiny screws in cocktail shaker, but lightly shaking.

I do not think I have bad spindle bearings, it would have been constantly high pitch noise.
The noise is not too loud, but it is noticable. It is not rpm depending, but it is kinda random in appearing.

Any ideas?

I am thinkig now, draw bar, floater...

Thanks in advance, guys.