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High Strength Harden Gearbox for Sale. Certified Quality Standards: Products certified by BV, SGS, CE, and TUV for reliability. Advanced CNC Manufacturing: Utilizes Fanuk series CNC computer-controlled milling machines. Custom Design Capability: We can design and manufacture screw barrels per customer requirements. Professional Heat Treatment: Long-term nitriding and heating treatment by our own facility. 12 Months Warranty: Comprehensive 12-month warranty with test before delivery. Multiple Size Options: SZ series available in sizes 45, 50, 55, 60, 65, 80, 92. OEM/ODM Service: Supports OEM and ODM services with 6 R&D engineers. Prompt After-Sale Service: Dedicated support team ensuring timely assistance.