1
G-Code, CAD, and CAM discussions / Speed Feed and Depth per pass question
« on: June 10, 2008, 10:17:54 AM »
Hello,
I have a Bostomatic 312 Milling Center I Converted to Mach and Rutex. Pretty stout machine. I'm having a problem calculating the proper speed feed and depth of cut. I've been staring at formula after formula but I think I am missing something along the way. Here's my question:
I want to pocket mill some 304 stainless .1875 thick with a 3 flute .375 carbide end mill, coolant on.
Textbook calculations look like this:
(numbers are tool manufacturer recommendation)
RPM: 150 x 3.82 / .375 =1528 (SFM x 3.82 / tool diameter)
Feed: 1528 x .001 x 3 = 4.584 (RPM x chip load per tooth x number of flutes)
My question:
Is the .001 x 3 or .003 chip load the same as the depth of cut per pass?
This seems to light of a cut and to slow of a speed to me.
Confused...
Robert
I have a Bostomatic 312 Milling Center I Converted to Mach and Rutex. Pretty stout machine. I'm having a problem calculating the proper speed feed and depth of cut. I've been staring at formula after formula but I think I am missing something along the way. Here's my question:
I want to pocket mill some 304 stainless .1875 thick with a 3 flute .375 carbide end mill, coolant on.
Textbook calculations look like this:
(numbers are tool manufacturer recommendation)
RPM: 150 x 3.82 / .375 =1528 (SFM x 3.82 / tool diameter)
Feed: 1528 x .001 x 3 = 4.584 (RPM x chip load per tooth x number of flutes)
My question:
Is the .001 x 3 or .003 chip load the same as the depth of cut per pass?
This seems to light of a cut and to slow of a speed to me.
Confused...
Robert