[UpAllNight]

well on my CNC with flooded coolant its not to bad ...dont get me wrong its nothing like ALU. but it takes some time to work out feeds and speeds and endmills that are designed to cut Copper..if u guys wont to know what brand of carbide endmill to use that would be Garr Tools solid carbide EM....run it at a 1000 rpm 3 ipm feed rate with flooded coolant(makes alot of difference)
we use these every day cutting 4140 heat treated to 32-36 RC
straight through .500 thick plate 1 pass...they are very impressive..i guess i have tryed about one of every brand and this is the best for the money...your talking about 25.00 for a 3/8 double end...not coated but the coated will last much longer than the standard carbide....i think the coated are about 7.00 more though....it also makes a difference as to the rigidity of your part and your machine....all we have are CNC that are from a 100,000 dollars and up in price...

hey Wiss if u cant find any help i could wip that drawing out for ya...been using Autocad sence before Windows...probly could whip that out in a hour or so


If any of u guys need help machining or programing just let me know...