Groove of deep:0,39" thickness:0,02125"

[frad8]

Hi,
could any one tell me how to make a groove on wood of with a CNC:

0,39 inch deep and 0,02125 thickness

also: 0,787" on 0,0275"

you can see it in the photo

[frad8]

I forgot,
specifications of the spindle:
6000 to 30000 t/min
4KW

[aspenelm]

interesting. there are endmills that are that size such as http://www.microcutusa.com/decimal2flute.php but you will be limited in depth. Otherwise it sounds like a job for laser if the holes are all the way through.

[frad8]

Hi aspenelm,
you are right, the job is done by laser and the hole is all the way through. but i'm trying to figure out how to do it with a CNC. I've visited your link but like you said, I'm limited buy the depth and diam (the relation between the 2). I've tried the tried with hitachi tools : http://www.hitachitool-eu.com/fr/pro...lid/form/ball/
but the active part of the cutter is too short. I broke one after 3mm depth. the material that's worked was not eliminated and did not go up. it constitueted an obstacle to upper cutter and it broke (150$ for one cutter).
Even if I go down with a larger diameter and after change the tool and go further down it could be ok since the diffrence between the 2 is not to large.

that's what I'm trying to resolve since a month.

the simpliest the hardest.

Sorry for my English