Dynamic milling question

[left coast lefty]

I noticed that in the Dynamic milling database every entry for aluminum used a 3 flute endmill. I was thinking about using a 5 flute 1" Data Flute with 2" LOC with a .1 stepover, flood coolant. More flutes, same chipload, higher feedrate. The obvious question- will it load up? Any help here would be much appreciated. I have a nice rigid 50 taper, 50 horse machine with 10K RPM.

[Hardmill]

I noticed that in the Dynamic milling database every entry for aluminum used a 3 flute endmill. I was thinking about using a 5 flute 1" Data Flute with 2" LOC with a .1 stepover, flood coolant. More flutes, same chipload, higher feedrate. The obvious question- will it load up? Any help here would be much appreciated. I have a nice rigid 50 taper, 50 horse machine with 10K RPM.

 

 

I say it will likey load up on you.

Horse power isnt going to help you any. Lighter chipload if anything but

i wouldnt try it myself.

 

 

 

 

 

 

 

 

 

 

PEACE

[gcode]

If you've got high pressure through spindle coolant and through coolant 5 flute endmills

you MIGHT get away with it... but you'll probably wind up with a big blob of molten

aluminum with $200 piece of carbide in the middle.

[Jroc85]

If you're cutting aluminum I would avoid a 5 flute endmill.

[Guest]

^^^^^^^

 

What he said, not enough chip evacuation clearance for ALuminum

[left coast lefty]

Thanks guys!

[Guest CNC Apps Guy 1]

4 flutes work well, 5 gets a little dicey with 10% stepover. I've done it on an HMC, but I had 20k on the RPM and 1900 IPM to play with and I only stepped over 7.5% Dia..

[left coast lefty]

I do have high pressure thru the spindle coolant...but absolutely no room for error. I'd better stick with 3 flutes.

[Guest CNC Apps Guy 1]

3 or 4 is fine.

[Goldorak]

If you've got high pressure through spindle coolant and through coolant 5 flute endmills

you MIGHT get away with it... but you'll probably wind up with a big blob of molten

aluminum with $200 piece of carbide in the middle.

 

like this ?

 

[left coast lefty]

I was not planning on plunging, but funny anyway!

[GoetzInd]

If 3 flutes are good, 5 are better

 

Mike

[gcode]

like this ?

 

 

 

that's pretty cool ... worthy of a place of honor on the wall of shame

[mr801]

I have cut aluminum with a 5 flute. I do it all the time.

 

[Chris In-House Solutions]

That picture is impressive you could maybe sell that as decorative art to someone.

[MIL-TFP-41]

Benchmark Carbide does make a 5 flute specifically for alum.....tho I would only use it to finish. Never tried it myself.....I found running with 3 flutes at 1200IPM was fast enough.

[Johnny M]

I have cut aluminum with a 5 flute. I do it all the time.

 

 

Mr 801,

 

What Machine are you running..

[Jroc85]

like this ?

 

That's an awesome picture.

[mr801]

Mr 801,

 

What Machine are you running..

 

That was with a Mori Seiki NH4000 DCG. I have run the same tool at double the RPM and Feeds with a DMG HSC 75 5 axis. Ofcourse I had double the hP and 2G of acceleration.