Since you didn’t say, I assumed that you were cutting slots (0.25" WOC). Based on my experience cutting Baltic Birch (likely harder to cut than oak plywood), you’re cuts should take a cutting force less than 1.33 lbf. My cuts with a 2 flute 1/8" endmill at 1/8" DOC and 60 IPM took 3.71 lbf came out fine.
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