roughing endmill speeds

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umahunter

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When setting up to use roughing endmills do you use the standard speed formula or is there a different formula you use thanks for any help :) :)
 
I typically drop the spindle speed about 10% and increase the depth of cut up to 2 to 3 x the diameter, using a 45% stepover. I leave the feed rate the same to keep the chip load up. But the feed rate and depth of cut might be limited by machine horsepower and stability.
 
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