Reply by DS

A 12” wide requires a minimum cut depth in a lunchbox.

If this were a 3” to 4” wide board you’d get away with up to 1/8” per pass.
That poor motor just can’t pull that much load.

Often, if I know I have thicker stock, I’ll adjust my plans to use 1” boards instead of 3/4”. Saves time, looks beefier. If it doesn’t make any difference functionally or asthetically, why bother with all the wood chips?

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251