HeffaLump "Percussion Engineering" wrote:

The circles are easy to see but impossibly difficult to photo, you have
to catch the light just right but they appear to be 2-3mm apart. I
cannot tell if they are truly concentric or spiralling.

I'm thinking 2 things . . . either play in the head bearings or the
crossfeed leadscrew. Please don't let it be the head bearings but I
can't see how the leadscrew can affect the finish if the gibs are
correctly set????


Check the head stock bearings. Sounds like what recently happened to one of
our LB15 Okuma's.

Wes