Selecting a CNC press brake requires matching the machine's capabilities with your production needs. Key factors include Tonnage (Pressure) and Bending Length. You should calculate the maximum thickness and length of the material you intend to bend; for example, bending 6mm mild steel over 3 meters typically requires at least 100-125 tons. Additionally, evaluate the Number of Axes (Y1, Y2, X, R, Z1, Z2). A standard 3-axis machine handles basic tasks, but a 4-axis or 6-axis system is essential for complex parts and high-speed production. Ensure the machine features a Crowing System (Mechanical or Hydraulic) to compensate for deflection and ensure consistent bending angles across the entire length.