Hi,
I have a job milling some slots in 1018 CRS.
Basically a flat plat 10mm thick. One 15mm wide slot, 5mm deep, right through from one edge to the other, so it's open ended.
The only success I've had on the 15mm wide slot is coated carbide 12mm 4F endmill at 0.5mm depth, 2600rpm and 1000mm/min feed. Flood coolant.
G wizard reckons on almost full depth of cut (4.4mm), 2538rpm and 645mm/min feed.
Basically I'm scared to come in a full DOC. I can't afford to scrap this job but it's taking too long.
Should I just go for it?
Flood it or dry with air? or?
Any help much appreciated.