Help for a fellow copper machinist

[tarek]

Hello every one, thi sis my first post and I really need some help from all of you copper machining professionals, I am having problems with a CNC machine custom made for n=my factory that drills a 5mm hole into a solid copper block, can any one tell me what is the suitable cutting speed and feed rate for this process and is there any thing taht I can do to prevent the braeking of the drill ( it breaks after an average of 200 holes). Thank you all.

[LUCKY13]

You might have better luck getting a anwser in this section ( post your tread in the listed section in this forum)

http://www.cnczone.com/forums/general_metalwork_discussion/


Its a section dedicated to machining operations to help people find how, and better ways of doing such a thing as your disscribing.


It would also help to give more info on the operation like,

How deep is the hole your drilling ?
What type of drill bit you are using ?
How many steppes are you drilling with ( starting drill size, next drill size )
What coolant/lubrication you are using?
What speeds and feeds have you tryed ?
And what was the results of these feeds/speeds ?


I cant anwser the question myself because I have not drilled any copper but if you will post it in the section I listed and give all the info you can these guys can probably help you do it better.


Good Luck, Jess

[jalessi]

Email this company.

http://www.cjtkoolcarb.com/index.html


ttrost@cjtkoolcarb.com

[ZipSnipe]

slow spindle speed, lots of coolant and lots of pecking, making sure to retract fully out of the hole to clear chips.