On 02/19/2020 10:21 AM, dave engvall wrote:
Indeed WD-40 seems to work well for Al. I have some Al
that is plain touchy. Creates heat very quickly and then I
get adhesion. 6061-T6 seems to be OK.
With soft aluminum, the key is to take light cuts and keep
the feedrate up. The problem is that when the metal is
warmed even a little, it gets MUCH softer. So, you want to
keep the cut moving along as fast as possible to not allow
heat to build up in one spot. Coolant can also help with
this. Thick pieces of aluminum can draw the heat away, so
it is less of a problem.
6061-T6 (or -T651) cuts great, 5052 or 1100 is much trickier
in this regard.
Jon
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