Upgrading my shop by buying a cnc mill so I can produce in house. However, I want to be able to mill steel, stainless, titanium and aluminum. The steel and titanium I know are lower rmp speeds for milling due to hardness. What is the minimum spindle rpm allowable so that I can buy a mill that will be capable of milling all of the above listed material?
2006-10-11 08:58:18 · 1 answers · asked by gpbullock 1 in Science & Mathematics ➔ Engineering
Depends on the tool size. For 2024-T4/T6, 2014, 6061-T6/T651, 7075-T6 types of aluminum, you want a cutting speed of 800-2000 FPM, which for a 1/4 " tool would be a minum of 12,200 RPM. For 440, 356, 380, C61300 types of aluminum, use 500-1000 FPM.
The formula for converting FPM tp RPM is:
Spindle Speed [RPM] = cutting speed (in inches) (pi*tool diameter). / Basically, find the circumference of the tool, divide the cutting speed by the tool circumference and that tells you how many times the tool will need to go around per minute to achieve the proper cutting speed. A larger diameter tool will go slower because it cuts more metal per revolution of the tool.
2006-10-11 09:59:41 · answer #1 · answered by Deirdre H 7 · 1⤊ 0⤋