Chipload and DOC for small endmills

[M250cnc]

The slots I'm cutting are 1.4mm wide and 1.3mm deep. (see my Gcode thread and look at timing pulleys program if you want to know exactly what's what...)


I think you meant stronger axially.

I think it's center cutting, not sure ... quite a big change to the code to do that but worth it I guess.

Where do you get the 0.01mm chipload number from, experience (if so good)? It's about the average value I found from checking various websites. I've used 0.025m chipload with 2mm 3 flute endmill successfully:

http://www.youtube.com/watch?v=p13LZ6IxmgY
(wrong title on that video!)

I may just grind a form tool to do this in the end, but it'll be nice to try it.

Experience! Only 7 years...much less than yourself I guess.

Yeah axially sorry, luckily you knew what I meant.

As you increase cutter diameter you can push harder but with only one cutter I would play it safe.

When drilling you can go slightly higher chipload.

You could use a proper drill to rough out the slot maybe use a 1.2mm drill.

Then use the mill to thin the web and cleanup the walls.

I would go the full depth on the walls.

All my experience comes in an industrial environment over 20 years.

Phil

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