try this for the video link
I can't view the video for some reason, but if it is a clattering sort of sound it is likely to be the quill splines rather than the gearbox. If you pull the quill down a bit and then check the noise and it goes away or changes significantly then that would be it.
LongRat
www.fulloption.co.uk
try this for the video link
Hm, that doesn't sound like I was expecting. Most likely something else then. Just check it does the same thing with the quill lowered. If the sound goes away then it isn't a bearing problem I would suggest.
LongRat
www.fulloption.co.uk
I have come to realise its actually some vibration in the drawbar. I changed the collet chuck and all of a sudden the noise was happening at a different RPM and yet it was consistent to that initial RPM while I only changed collets. More on this as I solve this.
Hey
it is okay for the spindel to get 60-70´C
if you losen the upper nut to mutch is will result in bad finish,