Which grade aluminium?

[JAZZCNC]

Surely it's milled not ground, not that is really concerns us.

So why bother saying it Numb nuts.!!! . . . .

The stuff I've got here certainly looks ground or they must have 8ft fly cutter looking at the radius of the machine lines.?? But I won't argue if somebody who knows better says other wise.!!. . . All I do know it's very very very flat.

[Jonathan]

Fair enough, it is surface ground:

http://bbs.homeshopmachinist.net/sho...1&postcount=10

I wasn't aware that grinding aluminium was realistic, so assumed it was done with something like a fly-cutter as the finish does look like it.

Learn something every day...