Router bit recommendation, spindle speed and feed rate?

[JAZZCNC]

Sorry to say this but that machine won't be able to cut anywhere near those speeds & feeds.!! It's just not strong enough. If it did manage to do them it wouldn't handle them for very long before stressing the machine.

The spindle is a good brand but it's still low power at 1.1KW (1.5HP) and between the machine strength and this then you'll have to cut at much lower DOC and feeds.. . . OR . . . really low DOC and high feeds. . . Basicly you won't be able to have both deep DOC & high feeds.!

Regards cutters then yes spiral single flute will work good and actually would lower the required feed rate and spindle speeds.
The spiral upcut would work ok because they are designed to lift and clear chips and give a very clean cut with very little burning when plunging.! . . .BUT . . This depends on the material your cutting and it's thickness.? Because it's a upcut then it's trying to lift the material so if it's thinner material and wide with very little support in the middle then it will lift material off the bed. Upcuts and thinner material really need to be used with vacuum beds.

Down cuts are safer bet and best used for thin material with no vacuum and they give a very nice finish.! . . .BUT. . They require very good chip extraction due to the fact they are pushing the chips downwards which will clog and pack the cutter resulting in re-cutting chips leaving a poor finish or even breakage.

So basicly if the material is heavy then go for spiral up cut.! . . If thin then spiral downcut.
Just remember the biggest killer of tooling regards wear and even breakage is insufficient feed rates. Ideally you want to find the chipload for that particular cutter, Chipload is the most accurate way to judge feeds & speeds regards tool life and giving best finish. Most good tool suppliers should be able to supply this info or give a guide to feed & speeds for material being cut.

So here's another guide for you based on single flute carbide cutter in plywood in various DOC.
( I quote Carbide because they last the longest, esp in MDF and Ply)

Carbide standard single flute (not spiral) 6mm cutter full slot.
DOC= 1mm Feed=7600mm/min Spindle 24,250RPM
DOC= 2mm Feed=7300mm/min Spindle 23,300RPM
DOC= 3mm Feed=6650mm/min Spindle 21,200RPM
DOC= 4mm Feed=5850mm/min Spindle 20,900RPM

Opitmised for deflection 6mm carbide
DOC= 6mm Feed=5850mm/min Spindle 20,100RPM

Hope this helps.





L