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(Fdmorrison) wrote in
:

"Ed Huntress"

Yes, although it's pretty rare. Ground surfaces on machine tool ways
are best used with pressure oil systems. When you don't have oil
pressure, it is possible, with an exceptional grinding job, to get
high friction.

The cure used in most machine tools is to "frost" the way surfaces,
which is a sort of after-the fact scraping job, usually done with a
power scraper to produce a decorative surface effect. You want it to
be very shallow and you aren't scraping to a standard here. You're
just trying to reduce the bearing area and leave some low areas (by
millionths, not by tenths) to hold oil and to reduce the contact area.

Final scraping called "frosting," or "flaking" is used for hand
scraping of ways for decoration (allegedly to hold oil), but would you
want to use it after final grinding (other than for decoration)?

If the surfaces here related "stuck" together dry (as Jo blocks) on
wringing, that would be one thing, but that's not the case so far
related. FM

too flat of a surface can create a hydraulic lock between parts. The ways
need to be scraped. The oil gets squeezed out of two really flat surfaces
and the parts adhere just like wringing jo blocks. Which is why it
occured after moving the slide back and forth a few times. Scraping keeps
pockets of oil between the metal surfaces.

--
Anthony

You can't 'idiot proof' anything....every time you try, they just make
better idiots.

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