軸，柱樞軸

The tolerances on this pivot are spot on—my column swings side to side with zero wobble now, and the swap took maybe twenty minutes. Fits exactly like the original, which is all I really needed.

Had to swap out the original pivot on my mini mill after it wore down, and this replacement lined up perfectly with the column bore. The fit was snug without any forcing, and now the swing from side to side feels solid with no play.

The pivot action is much smoother than the old one it replaced, which was getting pretty sticky. Installed it in about fifteen minutes and now the column doesn't bind at all when I swing it side to side. Exactly what my mini mill needed.