Genmitsu 4040-PRO CNC Machine: Increase your work output with faster milling and increased stability. Whether you're a CNC beginner, a hobbyist, or a small business owner looking for enterprise quality for commercial purposes, this is an excellent choice. 15-Min Frame Assembly: All main parts are pre-assembled and it just takes about 15 minutes to finish the whole machine assembly. Adding more grooves and locating pins on the main assembly parts will help you to locate the parts, avoid inaccurate alignment, and makes assembly easier. New Structure: Each axis is composed of two 16mm Steel HSS linear tubes and a lead screw motion drive. The design of a dual Y axis makes the CNC machine run with higher accuracy and better rigidity than Belt-driven. No Additional Parts Required: The 4040-PRO CNC machine includes all of the essential accessories and components you need to get started, including X, Y, Z axis limit switches, emergency stop switches, and Z-probe. The Z-probe that comes with the 4040-PRO CNC machine is the Photoelectric Z-probe, which works more accurately. Enhanced Stability, Accuracy, and Service Life: Achieving Higher Performance. Screw drives provide better positioning accuracy compared to belt drives, as they are less affected by elastic deformation and swing clearance. Additionally, screw drives are easier to maintain during use, eliminating the need for tedious belt leveling and offering greater durability.