Endmills :)
 

.0135" precision carbide end mills ..Can we say true Micro channels :p lol

Now THAT would be a very interesting waterblock. You plan to use a generous amount of these, I assume?

hehe i dont know what i,m gona do with these yet but I picked up 100 of those for real cheap :)


I,v been picking up bits and peaces here and there but I,m still looking for a used universal mill table for the right price but not had any luck ..But i,m patience man lol

i just have to ask, what is the in/min those things can handle, it's gotta be near 0.

Your going to need about 16,000-20,000RPM for those to work in any type of metal. At least thats what the last chart I read said.

Actually, quite a bit higher than that even. ~20K would be a near absolute minimum. You'd probably want to be looking at ~30K RPM or so, and even then, the feed rate and depth would be astronomically slow.

I'm used to 1mm mill bits. With a ~0.4mm mill bit as talked about here, you need to feed at least 2.5x slower, you cut 2.5x as shallow, and you have to make 2.5x as many passes.

Basically it would take around 16x longer as it takes with 1mm mill bit to carve out an equivalently sized set of channels.

It'd be faster and cheaper to just EDM the channels into copper, than to actually cut them out. However, if you have the bits, the mill and the machine time is "free", then yeah, I guess spending ~10 hours of machine time to carve out a single micro-channel block would be quite an interesting experiment to see.

edit: this post was stupid

Damn thats crazy. Talk about phenomenal flow restriction! Why not just cast this?

The smallest endmill I have used was "slightly" larger than this...at .015". I used a special air driven spindle to turn it at 30,000 rpm & that was still not quite fast enough in aluminium...70,000 rpm would of been more adequate. Copper...ballpark guess would be 60,000. on a manual brigdeport...very light cuts & slow feed an alot of luck...will probabally get you a few broken bits. Damn...that thing looks like it has quite the length of cut for how small it is...

but what the hell...give the thing a try...could be fun to see what you dream up

I have heard of bits even smaller than these.... .005" in dia. I find its amazing that they can even make the damn things that small....& if you look under a magnifing glass at them...they are perfect...

Thats not an end mill!

Its a pcb drill standard twist effort. And there absolutely rock hard aswell and lateral movment at any depth will break it.

Although theyre not cheap ($5 each i would imagine) to buy so you probably hit a bargin.

]JR[

$5 a peace wow i did get a great deal hehe

I found those at this place i been picking up endmills up for a future mill i,m puting together ..They was on the same shelf as the endmills ......I still dont know what i,m gona do with those but at the price i got them for i couldnt pass them up :)



ps: less then 10 cents a peace :p