calculating facemill rpm

[umahunter]

I have a 2 inch 75 degree facemill and I want to make sure I'm calculating right do you use the standard formula for 1018 1×1 steel 4 x 100 ÷ 2.000 = 200 rpm is this the correct formula? ??

 

[mikey]

Not sure on the answer but will bump this for you.

 

[Bob Korves]

I have a 2 inch 75 degree facemill and I want to make sure I'm calculating right do you use the standard formula for 1018 1×1 steel 4 x 100 ÷ 2.000 = 200 rpm is this the correct formula? ??

Yes, that formula would work for mild steel. I usually use 90 instead of 100, but close enough...