On Sun, Sep 06, 2009 at 02:54:43PM -0400, Douglas Pollard wrote: > > > What is neat oil. I've never heard that term before?
Just an expression, like "I take my whiskey neat", i.e. unadulterated. There is, however, something called "Neatsfoot oil" (http://en.wikipedia.org/wiki/Neatsfoot_oil), but I wasn't thinking of that, just unemulsified 100% cutting oil. Since the pong of kero is more than I can endure, as well as being unhealthy due to up to 18% aromatics (see wikipedia's kerosene entry), I'll try the WD-40 when cutting any soft aluminium. There's also methylated spirits. Since it evaporates, there's neither mess nor rusting, I figure. The TCT sawblades being sold for use on aluminium are supposed to be used with beeswax, which they sell in stick form. I suppose that my speeds are pretty slow if I could't melt that. The diecast Al that I've just finished with cut fine dry, with only an occasional build-up on the tool edge, that came off under gentle fingernail pressure. The finish wasn't first grade, though. I'll have to put the tool to some age-hardening aluminium alloy castings I made about 30 years ago, mixing about 3% Cu and 3% Zn with the Al, IIRC. It hardened enough to be tough going for a small round-column mill-drill, but cut like butter after 2 hours in the kitchen oven at top temperature. (It's supposed to be possible to lift the tensile strength from 10 to 25 tons/sq. in. [1], but even if it only makes the casting easier to machine, I figure it's worth doing.) [1] Again, relying on memory from 30 years ago. (Oh - Oh, there goes another evening, googling for more current info.) Erik ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
