pgmrmike
Hot Rolled
- Joined
- Jun 24, 2010
- Location
- Plantersville, TX
I have a job that calls for engraving a logo, PO etc. I have engraved before but usually use a centerdrill or 1/16" etc ball nose em etc. The customer is very specific in what they want on this part. It calls out a .015" ball nose end mill, .01" deep. I have never used an end mill this small on anything. Recommended speeds and feeds ( best I can tell from several sources )are .00004" per tooth, .003-.03" DOC ( full slotting ).
Tool: 4 flute Altin coated .015" ball stub
Machine max RPM is 8000 but I usually run 6000 max
Material: 8620 soft
So, if I run 6000 ( which is way to low sfm of course ) that ends up at .96 IPM and 3 passes.
Does sound right? Seems crazy slow. At a .003" DOC I would be getting some chip thinning and it seems like the feedrate should be higher. (I do this with larger EMs but... )
Any advice would be appreciated.
Tool: 4 flute Altin coated .015" ball stub
Machine max RPM is 8000 but I usually run 6000 max
Material: 8620 soft
So, if I run 6000 ( which is way to low sfm of course ) that ends up at .96 IPM and 3 passes.
Does sound right? Seems crazy slow. At a .003" DOC I would be getting some chip thinning and it seems like the feedrate should be higher. (I do this with larger EMs but... )
Any advice would be appreciated.