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Feeds and speeds is a little bit of a science, but very important to properly machining stock and also not damaging the machine.  Here are some reference points to get get you started

Feeds and speeds spreadsheet

https://www.nyccnc.com/speeds-feeds-excel-worksheet/

General Rules of thumb

The following is a general starting point for regular endmills.  These starting values do not apply for fly cutters, shear hogs, drill bits, taps and other special endmills

Start conservative and work you way up.

MaterialIPTMinimum IPTStarting Depth of Cut (DOC)

Starting Width of Cut (WOC)

Called Optimal load in Fusion 360 Adaptive

RPM    
Aluminum.001.0005100% of the with of endmill. For example 1/4 endmill = .25 DOC20% of tool width. For example 1/4 endmill = .05 WOCFaster    
Steel.001.0005100% of the with of endmill. For example 1/4 endmill = .25 DOC20% of tool width. For example 1/4 endmill = .05 WOCSlower    

Too shallow of cut is actually bad for tools.  You want to make chips and not rub the tool.

Too fast or too much material will cause chatter producing a poor surface finish and damage.  If the tool is chattering to the machine shaking stop immediately.


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