Underground 3000mm Mixer Microtunneling Boring Pipe Jacking Machine for Sewage Pipeline. Cone Crusher for Mixed Soil: Excavation chamber equipped with cone crusher to handle rock and mixed composition soil effectively. High Wear Resistance Design: Wear layer height 3-5mm, hardness above HRC56, with tungsten carbide brazing strength over 245Mpa. Robust Shell Construction: Shell thickness not less than 25mm, made as a whole part to avoid deformation. Advanced PLC Control System: Intelligent control with motor protection, 5-second delay stop, and 3-day deviation record logging. Ultrasonic Flaw Detection: Triple flaw detection ensures no cracks in main axle material (42CrMo) and gear integrity. Swing Bearing Main Drive: Adopts swing bearing design similar to Herrenknecht/MTS for high torque and reliability at low cost. Comprehensive After-Sales Support: Overseas commissioning engineers, 12-month warranty, and 24/7 hotline support available.