high feed machining recomendations....

[JG]

Hi All,

 

I'm looking for speed/feed/doc/stepover recomendations cutting A2 (not hardened) on a 40 taper machine, the tool is a Kennametal 4 fl insert mill with EC1408EGD inserts KC 725M grade. I don't have iserted tool or grade options but I could possible go with a 1" solid carbide em. I would really appreciate any help as I have not run A2 before....

 

thanks,

 

JG

[jeff]

What type of toolpath?

Are you cutting an outer form?

Are you cutting a pocket?

How deep?

I'm not an expert on HSM, but some more details might help others give you better advice.

[JG]

Hi Jeff,

 

I see your point, it would be a hsm path, the overall depth is about 2" and the shape has both crowned and dished type features. overall it is a large piece of stock, about 24 x 42, and so far it's making me a little nervous.....

[JG]

no ideas? should i just approach this conventionally?

[BenK]

If you can get a 1" solid carbide with that length of cut I would use dynamic mill or optirough.

[Goldorak]

like BenK but on a CAT40 i would use a 3/4 end mill, it will be smoother on the spindle and it will keep same cutting time

[JG]

any recomendations on sfm and ipt?

[Leigh @ Kodiak]

With a 3/4 solid carbide, I would go with two 1" depth passes. Dynamic mill. 1450RPM, 40IPM and .06" stepover.

[MrFish]

With a 3/4 solid carbide, I would go with two 1" depth passes. Dynamic mill. 1450RPM, 40IPM and .06" stepover.

 

Hi Leigh, a bit off topic , sorry for the hijack , but whats happening with RACE FACE, are you guys still manufacturing, who owns you ?