On 04/14/2020 12:48 PM, John Dammeyer wrote:
Thanks. The last bit of LinuxCNC milling with a 6mm carbide plunging into HRS
broke two of them. I'm really not doing this right yet. So any examples of
feeds, speeds and coolant are really helpful.
If the end mill is center-cutting, then you should be able
to do it, but chip clearance and stresses
on the carbide may be a problem.
If NOT center-cutting, then you have to do a circular
ramp-down cut, and make it enough bigger than
the end mill's diameter so that the non-cutting area in the
center of the tool doesn't leave a bump
in the middle of the hole.
Jon
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