What is this weird reamer? Answered
So I found this in the shop the other day. It looks like a normal reamer but it's not round. Four flutes extend to a larger diameter while four extend to a shorter diameter. The shorter flutes are sharpened just like the outer ones so they were clearly designed to cut something, even though they appear to have no clearance with which to do so. The tool has a keyed taper meaning it was intended for use in a heavy machine. The dimple in the tip of the tool does not go through the tool body.
Can anyone identify this weird tool? None of the professors or machinists I have shown it to have any idea what it is.