1.4mm DOC, slotting, 3mm tool, 23,000rpm, 370mm/min
1.4mm DOC, slotting, 6mm tool, 12,000rpm, 550mm/min

Having just been through this, I would pile in with these figures i think and keep my fingers crossed :)

Definitely use lube, WD40 etc, all the way, keep the chips clear.