Just purchased a "new" lathe........ 1950's American Pacemaker. The
owners manual calls for a high grade machine oil with a viscosity of
275-290 seconds Saybolt at 100* F. My local distributor is telling me
to use Febis K 68 as both an internal lubricant and as the slideway
oil. According to a chart that I found online, the Febis K 68 has a
Saybolt viscosity rating of 315 seconds Saybolt at 100* F (the correct
ISO numbers for the viscosity called for would be between 59 and
63....I don't think there are any in production with any of those
numbers). I am unsure as to whether it is safe to use this internally.
It is advertised as a slideway oil, so I think it would be fine there.
It probably is fine for the head and gearbox, but I just want the
advice of others with experience in these matters. Thanks!!