4mm MDF cutting on CNC...Advice please

[EddyCurrent]

Hi, I do quite a lot of routing with 3.2 and 6.3mm HDF/MDF. I mainly use 2mm PCB endmills and run the spindle at 2400+ rpm and a feed of about 2M/min. I do sometimes (if in a hurry) run at 3or4m/min, but worry a bit about tool breakage. at 2M/min the tools last for ages.

That's a very slow speed, "2400+", what depth of cut do you use ?

[Clive S]

That's a very slow speed, "2400+", what depth of cut do you use ?

I think that might be a typo for 24,000 rpm. ..Clive

[GEOFFREY]

Yes, thanks Clive, of course I did mean 24000rpm. the slowest my spindle will run is 1500rpm.

I always cut HDF/MDF in a single pass, but only cut up to 9.2mm. For the 9.2mm I use a 3.172 cutter. G.