Wow, I didn’t expect this part to print!
It’s a u-groove wheel for 624 bearings to ride on a linear shaft. It is essentially a huge over-hang. I expected the print to fail.
But, the garage is cold. PLA layers are cooling so fast, that the arch is enough support.
Easymaker is able to print perfect circles. The Z radius is too large, but the part works!!! Rolling is perfect!