Way Oiler: Automatic Machinery Lubrication [ + Vactra 2 ...
The 4 lines going the opposite way feed the Zaxis ways, Zaxis ballscrew, and Yaxis ballscrew. Oil comes in via the heavy black hose from the pump. Thomas mentions he wishes he had cut some oil channels into the ways. Now that I own 2 IH mills, I can use one to cut the grooves in the other with a small ball mill.