Johnford Double Columns are made from solid Meehanite iron castings. These bridge mills feature a long base casting with full table support throughout the entire X-axis travel, allowing massive loads to be machined. The Y and Z axes maintain fixed loads at all times, while the X-axis carries the only dynamic load, allowing for tight machining and close tolerances during high speed machining. Because there is no table overhang, X-axis pitch and yaw are eliminated. The distance from the spindle centerline to the column is minimized, providing further rigidity.