wrote in message
oups.com...
I have just become aware that at about 3000 rpm and above the headstock
bearings make an intermittent but sill rather coninuous popping chirp (
but not very high pitched ) racing sound. I have run the motor with out
the belt and it is quiet, so its not the motor. When you rotate the
headstock spindle by hand you can somewhat hear the bearings make noise
but it is neither a rough or high pitched sound. It just sounds like
the bearings are dry or something ( they are permanetly sealed bearings
). As I have more recently been using the lathe at higher speeds I do
not know it this is an old or new problem. There doesnt seem to be any
play in the spindle.
Any suggestions if the bearings need to be replaced?


Suggest the higher grade bearings. When you call your bearing place they'll
probably offer options within the same dimensions. Take the sealed higher
quality. You're purchasing one set, so the couple extra bucks won't mean
much, not like the manufacturer, who sees it as two less profit. Chirps
sound like binding, since loose or worn bearings rumble. Run it up, let it
chirp a while, turn off and touch the bearing gingerly. If it's warm,
replace.