Copper milling

[eponyme-le]

Hi everybody, I am french also i have not a very good english.

I wonder if machines able to mill aluminium can too mill copper ??

[Rekd]

Yes they can. Nothing magical about it either Just need to adjust your speeds/feeds a little.

'Rekd teh To be, or not to be, those are the parameters

[CAMmando]

Oui quel rekd a indiqué. Pas un problème. Vous voudrez probablement le besoin de courir des vitesses inférieures cependant (25% d'aluminium).

Dave teh "oui oui = wee wee"

[eponyme-le]

lol thank you for these replies !

if I buy a "low cost" mill like a sherline or a taig, i will also have the possibility to mill copper ?

Do you know some shops which send these products in france without big shippings ?

[Rekd]

Oui, vous pourrez courir le cuivre sur une machine de basse extrémité. Je ne sais pas l'expédition à ou de la France, désolée.

'poissons de rumeur de teh de Rekd

[eponyme-le]

oki thank you a lot !!

[hardmill]

'Rekd
I did'nt know you could habla?

PEACE

[Klox]

Hardmill,
I'm so glad Rekd teh joined me on this forum! It is nice to know that he can help the french speaking members in their own lanuage. Well done Rekd teh!!

The only language i speak fluently is NONSENSE!! (chuckle)

See you guys

Klox

[Dan B]

FYI...

Keep in mind that some grades of copper are quite soft. For drilling, a normal twist drill will "bite" in and quite possibly break. For drilling this grade of copper, you need to grind a negative rake on your twist drill to prevent this from happening.

Just a tip from an old toolmaker...

Dan

[Rekd]

For drilling this grade of copper, you need to grind a negative rake on your twist drill to prevent this from happening. Just a tip from an old toolmaker...

Good point, Dan. Or rake, or what ever. I've had luck with 135 deg drills with copper before. Copper is one of those materials that seems easy to machine, but it often turns into a R&D project when you start dealing with that gum.

'Rekd teh Eagles may soar, but weasels don't get sucked into jet engines!

[Dan B]

Hi Rekd,

The 135° you refer to is the drill tip angle (as opposed to the standard 118°). I am referring to the rake angle, which is the angle of the cutting edge. Try and picture a drill as a saw tooth if that's possible. The rake angle would correspond to the part of the tooth that digs in to the material. A negative rake would mean grinding that back so that it doesn't dig in, but scrapes the material.

Does any of that make sense?

Dan

[Rekd]

I understood the rake angle. Was just trying to drill some humor in there.

I used to machine plastics a lot. You typically used 135 degree drills to keep from melting it and chipping the bottom on break-out. I carried that practice over into machining copper as well. This angle seems to help keep from gumming up the copper as well, although I doubt it's for the same reasons.

'Rekd teh " I'm sorry for the mistake....Yes, we'll put those missing holes in a bag and ship them out right away, Mr. Johnson."