what coolant to use when milling copper?(3d design inside)
Hi, im about to mill some copper blocks, heres some 3d designs and figures
the block Is 2x2x.75 the channels are .65 deep and I will be using a 1/8 carbide tip router bit, but im unsure of what coolant to use, can I use water, and how would I apply the coolant, I read its hell to mill copper, but im doing this to cool my computer, this is my first time, thx a lot!
The only copper I have worked with was 510 alloy. It had a very bad habit of 'gumming' up in the tools. We ended up using a oil based coolant, and machining in small steps to make the parts. We seemed to have most of the problems when the material would get hot, we would make a pass (slot cut) and the material would 'grow' and close up the slot by .01-.015. Try cutting it slow, small steps with plenty of coolant.
yeah, i think i would rather use aluminum, i can get it for one half the price, but its not as good for cooling, its thermal conductivity at around -40C which is around wat my block is gonna be used for will perform a lot better with copper
I would use Master Chemical's Trim C320, Its sold by quite a few dealers, or you can get it on-line at www.jlindustrial.com. I would start at 65 sfm and .003-.010 per rev for drilling and 125 sfm and .002 per tooth feedrate.