Gantry rack double-drive fiber laser cutting machine with reinforced welded bed, large gantry precision milling, tempered and vibration-aged to eliminate stress. High-performance imported laser source cuts carbon steel, stainless steel, aluminum, copper and galvanized sheet as well as highly reflective materials with high precision. The beam is made of finite-element optimized aerospace-grade aluminum alloy, light, rigid and dynamically stable. Fully integrated design allows fast installation and compact footprint. Equipped with high-precision linear guides, precision reducers and ground racks for long-term accuracy. X/Y positioning speed up to 60 m/min, dual-drive acceleration up to 0.8 G. Models GPX3015-SJ, GPX4020-SJ and GPX6020-SJ cover cutting ranges from 1500x3000 mm to 2000x6000 mm, power 1000-20000 W, positioning accuracy +/-0.03 mm, cutting thickness 0.05-30 mm, 380 V 50/60 Hz. Widely used in machinery manufacturing and steel processing for food machinery, construction machinery, locomotives, agricultural and forestry machinery, kitchen and bathroom ware, elevator manufacturing, home appliances, grain machinery, textile machinery, tool processing, automobiles, decoration and advertising, aerospace, shipbuilding, electrical manufacturing and petroleum machinery, as well as laser job-shop services.