Quote Originally Posted by Molo1818 View Post
Hi Roger,
Thanks, as I was learning yesterday, I had an early visit from Santa!!!
Well at least from rudolf and his glowing red nose!!!!
�� Up on the cnc roof I heard a chatter, and when I looked I was blinded by a super red glow!!! And with a puff of smoke my bit was toast !! Hahahaha
I had set my cnc to run at 200ipm and a depth cut of .005”. Needless to say the first bit snapped. So I slowed the feed to 60ipm and got a lot of it cut until that bit wore out. Same with second bit but it went faster due to the fact that the wd40 started soaking into the mdf that I spray glued the sheet toand swelled up causing the bit to dig in to deep.
I don’t think the bits I have can take a single pass cut.
"200IPM" that would of been good to see, what RPM was the Spindle running at??

Other posts said you will just burn up the cutters, WD40 is not a cutting fluid for cutting steel sheet like this, it won't help your cutters at all, try some better real cutting fluid and a max of 7000RPM and 10 IPM