The Big Green Thread (I'm gonna regret posting this in the morning)

[mixedgas]

Was this C145/7 or another free machining copper? Or was this the nasty hard copper? If the latter, maybe try some of the C145 or C147.

I'm going for a leaded free machining brass that I have a stick of. I'll Look into C145/7. I knew something existed, but I did not know the designator.
Thank you for that tip!

Steve

[macona]

FWIW, Milk and cream make good cutting fluids for copper. It is the fatty acids that do the trick. Just make sure you clean up after! For Copper you might stick with HSS or get a "For Aluminum" carbide end mill. These are way sharper than the run of the mill carbide end mills. I get mine from Lake Shore Carbide, the three flute variables are wonderful.

[james]

Steve,
I am not going to attempt to teach you to suck eggs.

What? I have no idea what that means, but it is hilarious!

James.

[mixedgas]

James, you have obviously never been to Scout summer camp with kids who leave the eggs out. Racoons love eggs.
It is something to behold, the way the Racoon loveingly looks at the egg. Then gently sucks the insides out.

Leave some Eggs out the next time a city Racoon is behind your dwelling, its good entertainment, but lock the Pugs in the basement first.

I know what the phase means. Its Eastern Seaboard for dont do too much polishing to a mirror finish and complaining, get the thing working.

Steve.

[mixedgas]

FWIW, Milk and cream make good cutting fluids for copper. It is the fatty acids that do the trick. Just make sure you clean up after! For Copper you might stick with HSS or get a "For Aluminum" carbide end mill. These are way sharper than the run of the mill carbide end mills. I get mine from Lake Shore Carbide, the three flute variables are wonderful.

Wow, thanks for the tip.

"Um, Mr X, I need to douse one of your your Bridgeports with heavy cream." I can't wait to see the look on his face.

I can guess the reply will be something along the lines of "This is Not the Culinary Institute of America"

Steve

[macona]

Lard also makes a good cutting compound. Also lard mixed with sulfur.

[masterpj]

Since this is a big green thread after all:
I've always wondered how much these krystals for 532 dpps modules go for.
I know it's dangerous to work with DPSS green, mostly because off course of the dangerously high levels of IR but it's more a matter of curiousity

[planters]

FWIW, Milk and cream make good cutting fluids for copper. It is the fatty acids that do the trick. Just make sure you clean up after! For Copper you might stick with HSS or get a "For Aluminum" carbide end mill. These are way sharper than the run of the mill carbide end mills. I get mine from Lake Shore Carbide, the three flute variables are wonderful.

Lard also makes a good cutting compound. Also lard mixed with sulfur.

That IS great to know. So rather than Tap Matic, I could just smear my cannoli on my work piece. Seriously, I will try the milk and cream, but I suspect the clean up will be nasty. Those small, very sharp and heavy copper burrs stuck to various surfaces with the liquid will probably defeat my shop vac (my first stage ) and penetrate thru my shop towels (ouch).

Also, the three flute, aluminum cutting carbide is good advise. I will pick up a few.

I've always wondered how much these krystals for 532 dpps modules go for.

The range is huge. For the YAG, vanadate etc pumped crystals it can run from $50 for an eBay crystal of uncertain origin to thousands for highly engineered crystals with multi wavelength coatings applied to more than the primary two in/out surfaces. For the SHG (doubler), the range is a little narrower. These can be purchased for between $30 and a couple of hundred for the most basic coated crystal to close to $1,000 for the highest quality or more exotic material such as LBO.

[macona]

This is an old video of a 1/2" 3 flute aluminum end mill from Lake Shore. Crummy video quality, it was a lot better but a couple years back youtube killed the high res version for some reason.

[planters]

That mill is not chewing thru COPPER like that?! Air cooled? Or is that an aluminum block( the video IS poor)?