Originally Posted by
oneclick
The hole was made - possibly tapered - but round; then the taper was machined. What you see is the part of the hole not removed as the taper was made - that's why you see it of the outer part of the taper flat and the bolt seat (the taper is smaller there).
It's not a problem, the crank doesn't bear on the axle at that place but on the corners.
That is exactly what I was wondering, especially seeing it on many others. If I was to ever sell this bike in the future, I wanted to not hide flaws, so this is the answer I suspected.
As a side note, these cranks seem quite light with a sort of delicate look and feel. 144bcd doesn’t do it for me though.